subject:(digital equalization)

1. Paula, Amanda Souza de. Um estudo comparativo entre os sistemas OFDM e SCCP.

Degree: Mestrado, Sistemas Eletrônicos, 2010, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-162504/ ;

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Este trabalho trata da comparação entre os sistemas OFDM (orthogonal frequency division multiplexing) e SCCP (single carrier with cyclic prefix). Tais sistemas são analisados em… (more)

Subjects/Keywords: Codificação; Coding; Digital modulation; Equalização; Equalization; Modulação digital

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APA (6^th Edition):

Paula, A. S. d. (2010). Um estudo comparativo entre os sistemas OFDM e SCCP. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-162504/ ;

Chicago Manual of Style (16^th Edition):

Paula, Amanda Souza de. “Um estudo comparativo entre os sistemas OFDM e SCCP.” 2010. Masters Thesis, University of São Paulo. Accessed January 28, 2021. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-162504/ ;.

MLA Handbook (7^th Edition):

Paula, Amanda Souza de. “Um estudo comparativo entre os sistemas OFDM e SCCP.” 2010. Web. 28 Jan 2021.

Vancouver:

Paula ASd. Um estudo comparativo entre os sistemas OFDM e SCCP. [Internet] [Masters thesis]. University of São Paulo; 2010. [cited 2021 Jan 28]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-162504/ ;.

Council of Science Editors:

Paula ASd. Um estudo comparativo entre os sistemas OFDM e SCCP. [Masters Thesis]. University of São Paulo; 2010. Available from: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-11082010-162504/ ;

University of Melbourne

2. Zhu, Chen. Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems.

Degree: 2014, University of Melbourne

URL: http://hdl.handle.net/11343/42051

► Coherent optical communication systems have already been demonstrated as a promising technique for next-generation optical transport networks. Coherent reception not only supports advanced modulation formats… (more)

▼ Coherent optical communication systems have already been demonstrated as a promising technique for next-generation optical transport networks. Coherent reception not only supports advanced modulation formats and polarization division multiplexing (PDM) to enhance bandwidth efficiency, but also allows the use of digital signal processing (DSP) algorithms to compensate fibre channel impairments in the electrical domain. Single-carrier PDM quadrature-phase-shift-keying (QPSK) transmission scheme has already been commercialized as solution for 100-G Ethernet. In the meantime, the ever increasing bandwidth requirement is driving the research towards high spectrum-efficient transmission, which leads to the combination of higher-order quadrature-amplitude-modulation (QAM) formats and advanced spectrum shaping techniques. For commercial PDM-QPSK systems, the receiver’s DSP process mainly involves linear fibre channel impairment compensation and carrier recovery, where chromatic dispersion (CD) compensation and polarization de-multiplexing (pol-demux) are realized with separate filters. In particular, the CD filter is with static coefficients and is identical for both polarizations, while pol-demux is usually a multiple-input-multiple-output (MIMO) adaptive process using constant modulus algorithm (CMA). This typical structure has two main issues: (i) the two-stage equalization process is computationally expensive, since in principle these two linear filters can be combined in one step to save the computational circuits; (ii) the CMA algorithm cannot achieve optimal adaptation with high-order QAM formats with non-constant modulus, which requires feedback process or otherwise will cause performance penalty. We first consider optimizing the system performance for the conventional two-stage system with high-order QAM format (especially 16-QAM format). The mis-adjustment between CMA and 16-QAM is derived, and we propose to use multi-modulus algorithm (MMA) in 16-QAM system with fewer mis-adjustment errors. We experimentally verify that with pre-frequency offset compensation, MMA achieves more than 1-dB Q improvement compared to the CMA algorithm. Furthermore, in order to cope with the residual adaptive error, we propose a phase insensitive method namely decision-directed MMA for steady state optimization. Experimental results show that DD-MMA achieves the best performance among all the steady state algorithms. We then present the work to design the DSP circuits with feed-forward, modulation format flexible channel estimation (CE) technique based on training-aided technique (TA-CE). We first derive the optimal TS criterion to achieve minimum mean square error (MMSE) CE performance, and then reliable and robust approaches for frame timing synchronization (FTS) and frequency offset compensation (FOC) are addressed. Then the linear noise removal technique is provided by windowing the time-domain CE taps while reducing the training overhead ratio effectively. Furthermore, we propose to use the polyphase equalizer to achieve…

Subjects/Keywords: optical communication; coherent optical transmission system; digital equalization; digital signal processing

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APA (6^th Edition):

Zhu, C. (2014). Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems. (Doctoral Dissertation). University of Melbourne. Retrieved from http://hdl.handle.net/11343/42051

Chicago Manual of Style (16^th Edition):

Zhu, Chen. “Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems.” 2014. Doctoral Dissertation, University of Melbourne. Accessed January 28, 2021. http://hdl.handle.net/11343/42051.

MLA Handbook (7^th Edition):

Zhu, Chen. “Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems.” 2014. Web. 28 Jan 2021.

Vancouver:

Zhu C. Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems. [Internet] [Doctoral dissertation]. University of Melbourne; 2014. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11343/42051.

Council of Science Editors:

Zhu C. Advanced equalization and performance monitoring techniques in single-carrier coherent optical systems. [Doctoral Dissertation]. University of Melbourne; 2014. Available from: http://hdl.handle.net/11343/42051

University of Oklahoma

3. Lake, John. Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality.

Degree: PhD, 2019, University of Oklahoma

URL: http://hdl.handle.net/11244/319666

► The microwave band is well suited to wireless applications, including radar, communications, and electronic warfare. While radar operations currently have priority in a portion of… (more)

▼ The microwave band is well suited to wireless applications, including radar, communications, and electronic warfare. While radar operations currently have priority in a portion of the microwave band, wireless companies are lobbying to change that; such a change would force current operators into a smaller total bandwidth. Interference would occur, and has already occurred at the former National Weather Radar Testbed Phased Array Radar. The research in this dissertation was motivated by this interference – it occurred even without a change to radar's primacy in the microwave band. If microwave operations had to squeeze into a smaller overall bandwidth, such interference, whether originating from other radars or some other source, would only become more common. The radio frequency interference (RFI) present at the National Weather Radar Testbed Phased Array Radar altered the statistical properties at certain locations, causing targets to be erroneously detected. While harmless enough in clear air, it could affect National Weather Service decisions if it occurred during a weather event. The initial experiments, covered in Chapter 2, used data comprised of a single channel of in-phase and quadrature (IQ) data, reflecting the resources available to the National Weather Service's weather radar surveillance network. A new algorithm, the Interference Spike Detection Algorithm, was developed with these restrictions in mind. This new algorithm outperforms several interference detection algorithms developed by industry. Tests on this data examined algorithm performance quantitatively, using real and simulated weather data and radio frequency interference. Additionally, machine learning classification algorithms were employed for the first time to the RFI classification problem and it was found that, given enough resources, machine learning had the potential to perform even better than the other temporal algorithms. Subsequent experiments, covered in Chapter 3, used spatial data from phased arrays and looked at methods of interference mitigation that leveraged this spatial data. Specifically, adaptive beamforming techniques could be used to mitigate interference and improve data quality. A variety of adaptive digital beamforming techniques were evaluated in terms of their performance at interference mitigation for a communications task. Additionally, weather radar data contaminated with ground clutter was collected from the sidelobe canceller channels of the former National Weather Radar Testbed Phased Array Radar and, using the reasoning that ground clutter is simply interference from the ground, adaptive digital beamforming was successfully employed to mitigate the impact of ground clutter and restore the data to reflect the statistics of the underlying weather data. Tests on digital equalization, covered in Chapter 4, used data from a prototype receiver for Horus, a digital phased array radar under development at the University of Oklahoma. The data suffered from significant channel mismatch, which can… Advisors/Committee Members: Yeary, Mark (advisor), Fulton, Caleb (committee member), Goodman, Nathan (committee member), Sigmarsson, Hjalti (committee member), Homeyer, Cameron (committee member).

Subjects/Keywords: radio frequency interference; adaptive digital beamforming; digital equalization; radar

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APA (6^th Edition):

Lake, J. (2019). Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality. (Doctoral Dissertation). University of Oklahoma. Retrieved from http://hdl.handle.net/11244/319666

Chicago Manual of Style (16^th Edition):

Lake, John. “Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality.” 2019. Doctoral Dissertation, University of Oklahoma. Accessed January 28, 2021. http://hdl.handle.net/11244/319666.

MLA Handbook (7^th Edition):

Lake, John. “Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality.” 2019. Web. 28 Jan 2021.

Vancouver:

Lake J. Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality. [Internet] [Doctoral dissertation]. University of Oklahoma; 2019. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11244/319666.

Council of Science Editors:

Lake J. Temporal and Spatial Interference Mitigation Strategies to Improve Radar Data Quality. [Doctoral Dissertation]. University of Oklahoma; 2019. Available from: http://hdl.handle.net/11244/319666

Universitat Politècnica de València

4. Rodrigues De Lima, Eduardo. Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases .

Degree: 2016, Universitat Politècnica de València

URL: http://hdl.handle.net/10251/61967

► [EN] The first generation of Terrestrial Digital Television(DTV) has been in service for over a decade. In 2013, several countries have already completed the transition… (more)

▼ [EN] The first generation of Terrestrial Digital Television(DTV) has been in service for over a decade. In 2013, several countries have already completed the transition from Analog to Digital TV Broadcasting, most of which in Europe. In South America, after several studies and trials, Brazil adopted the Japanese standard with some innovations. Japan and Brazil started Digital Terrestrial Television Broadcasting (DTTB) services in December 2003 and December 2007 respectively, using Integrated Services Digital Broadcasting - Terrestrial (ISDB-T), also known as ARIB STD-B31. In June 2005 the Committee for the Information Technology Area (CATI) of Brazilian Ministry of Science and Technology and Innovation MCTI approved the incorporation of the IC-Brazil Program, in the National Program for Microelectronics (PNM) . The main goals of IC-Brazil are the formal qualification of IC designers, support to the creation of semiconductors companies focused on projects of ICs within Brazil, and the attraction of semiconductors companies focused on the design and development of ICs in Brazil. The work presented in this thesis originated from the unique momentum created by the combination of the birth of Digital Television in Brazil and the creation of the IC-Brazil Program by the Brazilian government. Without this combination it would not have been possible to make these kind of projects in Brazil. These projects have been a long and costly journey, albeit scientifically and technologically worthy, towards a Brazilian DTV state-of-the-art low complexity Integrated Circuit, with good economy scale perspectives, due to the fact that at the beginning of this project ISDB-T standard was not adopted by several countries like DVB-T. During the development of the ISDB-T receiver proposed in this thesis, it was realized that due to the continental dimensions of Brazil, the DTTB would not be enough to cover the entire country with open DTV signal, specially for the case of remote localizations far from the high urban density regions. Then, Eldorado Research Institute and Idea! Electronic Systems, foresaw that, in a near future, there would be an open distribution system for high definition DTV over satellite, in Brazil. Based on that, it was decided by Eldorado Research Institute, that would be necessary to create a new ASIC for broadcast satellite reception. At that time DVB-S2 standard was the strongest candidate for that, and this assumption still stands nowadays. Therefore, it was decided to apply to a new round of resources funding from the MCTI - that was granted - in order to start the new project. This thesis discusses in details the Architecture and Algorithms proposed for the implementation of a low complexity Intermediate Frequency(IF) ISDB-T Receiver on Application Specific Integrated Circuit (ASIC) CMOS. The Architecture proposed here is highly based on the COordinate Rotation Digital Computer (CORDIC) Algorithm, that is a simple and efficient algorithm suitable for VLSI implementations. The receiver copes with the… Advisors/Committee Members: Almenar Terré, Vicenç (advisor), Flores Asenjo, Santiago José (advisor).

Subjects/Keywords: Digital Television; Digital Receivers; OFDM; Digital Signal Processing; Synchronization; Integrated Circuits Design; ASIC; FPGA; DTTV; Satellite Receivers; DVB-S2; ISDB-T; ISDB-Tb; Wireless; Equalization; Adaptive Equalization

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APA (6^th Edition):

Rodrigues De Lima, E. (2016). Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases . (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/61967

Chicago Manual of Style (16^th Edition):

Rodrigues De Lima, Eduardo. “Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases .” 2016. Doctoral Dissertation, Universitat Politècnica de València. Accessed January 28, 2021. http://hdl.handle.net/10251/61967.

MLA Handbook (7^th Edition):

Rodrigues De Lima, Eduardo. “Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases .” 2016. Web. 28 Jan 2021.

Vancouver:

Rodrigues De Lima E. Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases . [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2016. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10251/61967.

Council of Science Editors:

Rodrigues De Lima E. Architecture and algorithms for the implementation of digital wireless receivers in FPGA and ASIC: ISDB-T and DVB-S2 cases . [Doctoral Dissertation]. Universitat Politècnica de València; 2016. Available from: http://hdl.handle.net/10251/61967

Northeastern University

5. He, Jin. Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems.

Degree: PhD, Department of Electrical and Computer Engineering, 2010, Northeastern University

URL: http://hdl.handle.net/2047/d20002063

► Proliferation of mobile data applications has increased the demand for wireless communication systems offering high throughput, wide coverage, and improved reliability. The main challenges in… (more)

▼ Proliferation of mobile data applications has increased the demand for wireless communication systems offering high throughput, wide coverage, and improved reliability. The main challenges in the design of such systems are the limited resources – such as constrained transmission power, scarce frequency bandwidth, and limited implementation complexity – and the impairments of the wireless channels, including noise, interference, and fading effects. Multiple-Input Multiple-Output (MIMO) communication has been shown to be one of the most promising emerging wireless technologies that can efficiently boost the data transmission rate, improve system coverage, and enhance link reliability. MIMO is now widely adopted by many mainstream wireless industry standards including 3GPP WCDMA/HSDPA, LTE, EVDO, WiFi, and WiMAX. By employing multiple antennas at both transmitter and receiver sides, MIMO techniques enable a new dimension – the spatial dimension – that can be utilized in different ways to combat the impairments of wireless channels. Spatial diversity provided by multiple antennas is one of the diversity techniques, which are known to be the most effective tool against fading effects of wireless channels. Spatial multiplexing exploits independent fading effects to create additional degrees of freedom, thus achieving higher capacity. Spatial diversity benefits different systems and channel types, from single user systems to multi-user systems, and from flat-fading to frequency-selective channels.; This thesis focuses on precoding and equalization techniques, for flat-fading MIMO broadcast channels, with their applications in spread spectrum communication systems. First, a novel linear precoding technique, Coordinated Interference-aware Beamforming (CIB) that utilizes channel side information at the transmitter for transmit beamforming is introduced in Chapter 2. With constrained transmitted power, CIB balances multi-user interference, spatial channel interference, and noise effects. Both analysis and the simulation results show that the achievable sum-rate of CIB bridges the rates of zero-forcing precoding and matched filtering techniques at high and low signal to noise ratios, respectively. The complexity of CIB is similar to that of other linear non-adaptive techniques; however, in addition to featuring a closed-form solution, it also allows flexible configurations on the number of antennas at the transmitter and receiver sides. In Chapter 3, we show that for the more complicated spread-spectrum systems with frequency-selective broadcast channels, the properly extended CIB can precode the signals well and inherits the some of the benefits of CIB for flat-fading channels. The role of CIB in maximizing the signal to interference plus noise ratio results in improved performance in error rates compared with other linear techniques. In Chapter 4 we introduce an innovative nonlinear eigenvalue-decomposition based lattice precoding technique (EDLP), designed for precoding and equalization for single user flat-fading channels.…

Subjects/Keywords: broadcast channel; equalization; MIMO; precoding; spread spectrum; MIMO systems; Signal processing; Digital Communications and Networking

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

He, J. (2010). Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems. (Doctoral Dissertation). Northeastern University. Retrieved from http://hdl.handle.net/2047/d20002063

Chicago Manual of Style (16^th Edition):

He, Jin. “Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems.” 2010. Doctoral Dissertation, Northeastern University. Accessed January 28, 2021. http://hdl.handle.net/2047/d20002063.

MLA Handbook (7^th Edition):

He, Jin. “Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems.” 2010. Web. 28 Jan 2021.

Vancouver:

He J. Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems. [Internet] [Doctoral dissertation]. Northeastern University; 2010. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/2047/d20002063.

Council of Science Editors:

He J. Precoding and equalization for MIMO broadcast channels with applications in spread spectrum systems. [Doctoral Dissertation]. Northeastern University; 2010. Available from: http://hdl.handle.net/2047/d20002063

Université Catholique de Louvain

6. Oguz, Onur. Unified analysis of communication receivers using a Bayesian approach.

Degree: 2011, Université Catholique de Louvain

URL: http://hdl.handle.net/2078.1/106870

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A digital communication system is defined mainly by three entities, namely, transmitter, communication medium and receiver. Particular descriptions of the transmitter and the communication medium… (more)

Subjects/Keywords: Bayes; MIMO; Estimation; Detection; Receiver; Factor graph; Graph; Belief propagation; Digital communication; Coding; Decoding; Equalization

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APA (6^th Edition):

Oguz, O. (2011). Unified analysis of communication receivers using a Bayesian approach. (Thesis). Université Catholique de Louvain. Retrieved from http://hdl.handle.net/2078.1/106870

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Oguz, Onur. “Unified analysis of communication receivers using a Bayesian approach.” 2011. Thesis, Université Catholique de Louvain. Accessed January 28, 2021. http://hdl.handle.net/2078.1/106870.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Oguz, Onur. “Unified analysis of communication receivers using a Bayesian approach.” 2011. Web. 28 Jan 2021.

Vancouver:

Oguz O. Unified analysis of communication receivers using a Bayesian approach. [Internet] [Thesis]. Université Catholique de Louvain; 2011. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/2078.1/106870.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Oguz O. Unified analysis of communication receivers using a Bayesian approach. [Thesis]. Université Catholique de Louvain; 2011. Available from: http://hdl.handle.net/2078.1/106870

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Toronto

7. Jalali, Mohammad Sadegh. Circuits for Blind ADC-based CDRs and Frequency Detectors.

Degree: PhD, 2015, University of Toronto

URL: http://hdl.handle.net/1807/72062

► This thesis presents three contributions in the area of clock and data recovery (CDR). Two of these three contributions focus on the design of frequency… (more)

Subjects/Keywords: Analog to Digital Converter; Clock and data recovery; Equalization; Frequency detector; SerDes; Wireline; 0537

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jalali, M. S. (2015). Circuits for Blind ADC-based CDRs and Frequency Detectors. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/72062

Chicago Manual of Style (16^th Edition):

Jalali, Mohammad Sadegh. “Circuits for Blind ADC-based CDRs and Frequency Detectors.” 2015. Doctoral Dissertation, University of Toronto. Accessed January 28, 2021. http://hdl.handle.net/1807/72062.

MLA Handbook (7^th Edition):

Jalali, Mohammad Sadegh. “Circuits for Blind ADC-based CDRs and Frequency Detectors.” 2015. Web. 28 Jan 2021.

Vancouver:

Jalali MS. Circuits for Blind ADC-based CDRs and Frequency Detectors. [Internet] [Doctoral dissertation]. University of Toronto; 2015. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/1807/72062.

Council of Science Editors:

Jalali MS. Circuits for Blind ADC-based CDRs and Frequency Detectors. [Doctoral Dissertation]. University of Toronto; 2015. Available from: http://hdl.handle.net/1807/72062

Ohio University

8. Hoerig, Craig. A flexible system for digital waveform shaping and equalization.

Degree: MS, Electrical Engineering & Computer Science (Engineering and Technology), 1991, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183730288

► This thesis presents new precision baseband pulse shaping to reduce intersymbol interference (ISI) in a satellite system. This new pulse shaping is accomplished via a… (more)

Subjects/Keywords: Flexible System; Digital Waveform Shaping; Equalization

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APA (6^th Edition):

Hoerig, C. (1991). A flexible system for digital waveform shaping and equalization. (Masters Thesis). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183730288

Chicago Manual of Style (16^th Edition):

Hoerig, Craig. “A flexible system for digital waveform shaping and equalization.” 1991. Masters Thesis, Ohio University. Accessed January 28, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183730288.

MLA Handbook (7^th Edition):

Hoerig, Craig. “A flexible system for digital waveform shaping and equalization.” 1991. Web. 28 Jan 2021.

Vancouver:

Hoerig C. A flexible system for digital waveform shaping and equalization. [Internet] [Masters thesis]. Ohio University; 1991. [cited 2021 Jan 28]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183730288.

Council of Science Editors:

Hoerig C. A flexible system for digital waveform shaping and equalization. [Masters Thesis]. Ohio University; 1991. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1183730288

9. Acácio, Luís Carlos Lorenzo. Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing.

Degree: Mestrado, Sistemas Eletrônicos, 2004, University of São Paulo

URL: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/ ;

►

Esta dissertação trata da equalização no domínio do tempo de sistemas de comunicações digitais baseados em orthoghonal frequency-division multiplexing (OFDM), normalmente referida na literatura técnica… (more)

▼

Esta dissertação trata da equalização no domínio do tempo de sistemas de comunicações digitais baseados em orthoghonal frequency-division multiplexing (OFDM), normalmente referida na literatura técnica como equalização pré-FFT. Tais sistemas foram originalmente projetados de modo a não necessitar de equalização, porém podem se beneficiar com seu uso, como mostrado a seguir. Foi implementado, em programa de computador, um simulador não codificado do sistema de televisão digital terrestre utilizado na Europa, o digital video broadcasting (DVB-T), que é baseado em OFDM e se encontra implantado com sucesso há alguns anos. Diversas simulações foram executadas comparando o método tradicional de recepção do sistema DVB-T com a versão equalizada proposta. Foram utilizadas várias técnicas de processamento digital de sinais para simular: a geração do sinal, sua passagem por um canal de comunicação com multipercurso, presença de ruído branco Gaussiano aditivo, equalização LMS (Least Mean Square), entre outros fenômenos importantes. Para um firme embasamento, o trabalho apresenta estudos matemáticos sobre a teoria geral do OFDM, modelos de canais de comunicação e o princípio básico do algoritmo LMS. Tendo-se utilizado o DVB-T como estudo de caso prático, não poderia deixar de constar uma descrição técnica desse sistema em que são apresentados vários dos detalhes e problemas envolvidos na geração e recepção do sinal. Com a finalidade de posicionar o leitor histórica e tecnologicamente, o texto inclui ainda uma revisão dos principais fatos que marcaram o desenvolvimento do OFDM desde os estudos iniciais até os dias de hoje.

This dissertation deals with time-domain equalization of digital communications systems based on orthoghonal frequency-division multiplexing (OFDM), usually referred as pre-FFT equalization in the technical literature. Such systems were originally designed to require no time equalization but can profit from its use, as is shown in this work. An uncoded simulator of the OFDM-based European system for terrestrial digital television transmission, the digital video broadcasting (DVB-T), was implemented in software. Many simulations were run to compare the performance of the traditional DVB-T reception method with the equalized version proposed. Several digital signal processing techniques were used to simulate as diverse fenomena as: generation of the source signal, effect of multipath communications channels, presence of additive white Gaussian noise, LMS (Least Mean Square) equalization, among others. In order to develop a solid base, the work includes mathematical studies about the general OFDM theory, models of communications channels and the basic principle of operation of the LMS algorithm. Since the DVB-T was used as a practical study case, a technical description of the system is presented, in which many problems and aspects about its generation and reception are discussed. To provide the reader with a historical and technological insight on the subject, this work also includes a summary of the landmarks…

Advisors/Committee Members: Nascimento, Vitor Heloiz.

Subjects/Keywords: digital TV; equalização; equalization; OFDM; OFDM; TV digital

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APA (6^th Edition):

Acácio, L. C. L. (2004). Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing. (Masters Thesis). University of São Paulo. Retrieved from http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/ ;

Chicago Manual of Style (16^th Edition):

Acácio, Luís Carlos Lorenzo. “Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing.” 2004. Masters Thesis, University of São Paulo. Accessed January 28, 2021. http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/ ;.

MLA Handbook (7^th Edition):

Acácio, Luís Carlos Lorenzo. “Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing.” 2004. Web. 28 Jan 2021.

Vancouver:

Acácio LCL. Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing. [Internet] [Masters thesis]. University of São Paulo; 2004. [cited 2021 Jan 28]. Available from: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/ ;.

Council of Science Editors:

Acácio LCL. Equalização pré-FFT de sistemas baseados em orthogonal frequency-division multiplexing. [Masters Thesis]. University of São Paulo; 2004. Available from: http://www.teses.usp.br/teses/disponiveis/3/3142/tde-17122004-154902/ ;

10. Amado, Sofia Batalha de Oliveira Pascoal. Digital equalization for optical coherent transmission systems .

Degree: 2019, Universidade de Aveiro

URL: http://hdl.handle.net/10773/28532

► This thesis focus on the digital equalization of fiber impairments for coherent optical transmission systems. New efficient and low-complexity equalization and mitigation techniques that counteract… (more)

▼ This thesis focus on the digital equalization of fiber impairments for coherent optical transmission systems. New efficient and low-complexity equalization and mitigation techniques that counteract fiber nonlinear impairments are proposed and the tradeoff between performance and complexity is numerically assessed and experimentally demonstrated in metro and long-haul 400G superchannels-based transmission systems. Digital backpropagation (DBP) based on low-complexity split-step Fourier method and Volterra series nonlinear equalizers are experimentally assessed in an uniform superchannel system. In contrast with standard DBP methods, these techniques prove to be able to be implemented with larger step-sizes, consequently requiring a reduced number of multiplications, and still achieve a significant reach extension over linear equalization techniques. Moreover, given its structure, the complexity of the proposed Volterra-based DBP approach can be easily adjusted by changing the nonlinear filter dimension according to the system requirements, thus providing a higher flexibility to the nonlinear equalization block. A frequency-hybrid superchannel envisioning near-future flexible networks is then proposed as a way to increase the system bit-rate granularity. The problematic of the power-ratio between superchannel carriers is addressed and optimized for linear and nonlinear operation regimes using three distinct FEC paradigms. Applying a single FEC to the entire superchannel has a simpler implementation and is found to be a more robust approach, tolerating larger uncertainties on the system parameters optimization. We also investigate the performance gain provided by the application of different DBP techniques in frequency-hybrid superchannel systems, and its implications on the optimum power-ratio. It is shown that the application of DBP can be restricted to the carrier transporting the higher cardinality QAM format, since the DBP benefit on the other carriers is negligible, which might bring a substantially complexity reduction of the DBP technique applied to the superchannel. Advisors/Committee Members: Pinto, Armando Nolasco (advisor), Muga, Nelson de Jesus Cordeiro (advisor).

Subjects/Keywords: Optical communication systems; High-order modulation formats; Coherent detection; Digital signal processing; Superchannels; 400G; Nonlinear equalization; Digital backpropagation

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APA (6^th Edition):

Amado, S. B. d. O. P. (2019). Digital equalization for optical coherent transmission systems . (Thesis). Universidade de Aveiro. Retrieved from http://hdl.handle.net/10773/28532

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Amado, Sofia Batalha de Oliveira Pascoal. “Digital equalization for optical coherent transmission systems .” 2019. Thesis, Universidade de Aveiro. Accessed January 28, 2021. http://hdl.handle.net/10773/28532.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Amado, Sofia Batalha de Oliveira Pascoal. “Digital equalization for optical coherent transmission systems .” 2019. Web. 28 Jan 2021.

Vancouver:

Amado SBdOP. Digital equalization for optical coherent transmission systems . [Internet] [Thesis]. Universidade de Aveiro; 2019. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10773/28532.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Amado SBdOP. Digital equalization for optical coherent transmission systems . [Thesis]. Universidade de Aveiro; 2019. Available from: http://hdl.handle.net/10773/28532

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

11. Lee, Keytaek. High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques.

Degree: MS, Electrical Engineering, 2012, Texas A&M University

URL: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11000

► High-speed serial input-output (I/O) link has required advanced equalization and modulation techniques to mitigate inter-symbol interference (ISI) caused by multi-Gb/s signaling over band-limited channels. Increasing… (more)

▼ High-speed serial input-output (I/O) link has required advanced equalization and modulation techniques to mitigate inter-symbol interference (ISI) caused by multi-Gb/s signaling over band-limited channels. Increasing demands for transceiver power and area complexity has leveraged on-going interest in analog-to-digital converter (ADC) based link, which allows for robust equalization and flexible adaptation to advanced signaling. With diverse options in ISI control techniques, link performance analysis for complicated transceiver architectures is very important. This work presents advanced statistical modeling for ADC-based link, performance comparison of existing modulation and equalization techniques, and proposed hybrid ADC-based receiver that achieves further power saving in digital equalization. Statistical analysis precisely estimates high-speed link margins at given implementation constrains and low target bit-error-rate (BER), typically ranges from 1e-12 to 1e-15, by applying proper statistical bound of noise and distortion. The proposed statistical ADC-based link modeling utilizes bounded probability density function (PDF) of limited quantization distortion (4-6 bits) through digital feed-forward and decision feedback equalizers (FFE-DFE) to improve low target BER estimation. Based on statistical modeling, this work surveys the impact of insufficient equalization, jitter and crosstalk on modulation selection among two and four level pulse amplitude modulation (PAM-2 and PAM-4, respectively) and duobinary, and ADC resolution reduction performance by partial analog equalizer (PAE). While the information of channel loss at effective Nyquist frequency and signaling constellation loss initially guides modulation selection, the statistical analysis results show that PAM-4 best tolerates jitter and crosstalk, and duobinary requires the least equalization complexity. Meanwhile, despite robust digital equalization, high-speed ADC complexity and power consumption is still a critical bottleneck, so that PAE is necessitated to reduce ADC resolution requirement. Statistical analysis presents up to 8-bit resolution is required in 12.5Gb/s data communications at 46dB of channel loss without PAE, while 5-bit ADC is enough with 3-tap FFE PAE. For optimal ADC resolution reduction by PAE, digital equalizer complexity also increases to provide enough margin tolerating significant quantization distortion. The proposed hybrid receiver defines unreliable signal thresholds by statistical analysis and selectively takes additional digital equalization to save potentially increasing dynamic power consumption in digital. Simulation results report that the hybrid receiver saves at least 64% of digital equalization power with 3-tap FFE PAE in 12.5Gb/s data rate and up to 46dB loss channels. Finally, this work shows the use of embedded-DFE ADC in the hybrid receiver is limited by error propagation. Advisors/Committee Members: Palermo, Samuel (advisor), Silva-Martinez, Jose (committee member), Narayanan, Krishna R. (committee member), Walker, Duncan M. (committee member).

Subjects/Keywords: Analog-to-digital converter (ADC); equalization; modulation; I/O link; link analysis tools; statistical signaling analysis

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APA (6^th Edition):

Lee, K. (2012). High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques. (Masters Thesis). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11000

Chicago Manual of Style (16^th Edition):

Lee, Keytaek. “High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques.” 2012. Masters Thesis, Texas A&M University. Accessed January 28, 2021. http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11000.

MLA Handbook (7^th Edition):

Lee, Keytaek. “High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques.” 2012. Web. 28 Jan 2021.

Vancouver:

Lee K. High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques. [Internet] [Masters thesis]. Texas A&M University; 2012. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11000.

Council of Science Editors:

Lee K. High-Speed Link Modeling: Analog/Digital Equalization and Modulation Techniques. [Masters Thesis]. Texas A&M University; 2012. Available from: http://hdl.handle.net/1969.1/ETD-TAMU-2012-05-11000

McMaster University

12. Taylor, Desmond Patrick. Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels.

Degree: PhD, 1972, McMaster University

URL: http://hdl.handle.net/11375/19424

►

This thesis deals with the problem of digital communication over noisy dispersive channels. The dispersion causes the overlapping of successive received pulses thus creating… (more)

▼

This thesis deals with the problem of digital communication over noisy dispersive channels. The dispersion causes the overlapping of successive received pulses thus creating intersymbol interference which severely limits the performance of conventional receivers designed to combat only additive interference or noise. In this thesis Bayes estimation theory has been applied to obtain a new, optimum, unrealizable receiver structure for the improved reception of noisy, dispersed, pulse amplitude-modulated (PAM) signals. By making certain approximations, a realization of this structure, known as the estimate feedback receiver or equalizer, is obtained. It consists of the combination of a matched filter and a nonlinear, recursive equalizer having, in the case of binary signals, a hyperbolic tangent nonlinearity in the feedback path. The well known decision feedback equalizer is shown to be a small noise limiting case of the estimate feedback equalizer. A saturating limiter is also considered as an approximation to the hyperbolic tangent nonlinearity. A new adaptive algorithm for the iterative adjustment of the estimate feedback equalizer is derived. It incorporates an extrapolation process which has the purposes of accelerating convergence of the equalizer's parameters to their optimum values and of maintaining the equalizer's frame of reference. It is constrained so that the equalizers parameters always move toward their optimum values. Computer simulations are used to demonstrate the properties of the adaptive estimate feedback equalizer and to compare them to those of presently known equalizers. When the estimate feedback equalizer is used, without a matched filter preceding it, to equalize phase distorted channels, its performance is seen to be superior to that of existing equalizers. The performance of an equalizer using a saturating limiter in place of the optimum hyperbolic tangent nonlinearity is seen to be almost as good as that of the estimate feedback equalizer.

Thesis

Doctor of Philosophy (PhD)

Advisors/Committee Members: Gladwin, A. S., Electrical Engineering.

Subjects/Keywords: nonlinear; feedback; equalization; digital; signals; transmitted; dispersive; channels; pulse

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Taylor, D. P. (1972). Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/19424

Chicago Manual of Style (16^th Edition):

Taylor, Desmond Patrick. “Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels.” 1972. Doctoral Dissertation, McMaster University. Accessed January 28, 2021. http://hdl.handle.net/11375/19424.

MLA Handbook (7^th Edition):

Taylor, Desmond Patrick. “Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels.” 1972. Web. 28 Jan 2021.

Vancouver:

Taylor DP. Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels. [Internet] [Doctoral dissertation]. McMaster University; 1972. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11375/19424.

Council of Science Editors:

Taylor DP. Nonlinear Feedback Equalization of Digital Signals Transmitted Over Dispersive Channels. [Doctoral Dissertation]. McMaster University; 1972. Available from: http://hdl.handle.net/11375/19424

13. Nolan, John Edward. Equalization methods to improve performance of low cost copper ethernet channels.

Degree: MS, Computer Engineering, 2014, California State University – Sacramento

URL: http://hdl.handle.net/10211.3/131782

► High speed serial links that connect devices are becoming increasingly difficult to design as link speed increases. Insertion loss, Inter Symbol Interference (ISI), noise and… (more)

Subjects/Keywords: Equalization; SerDes; Transceiver; High speed digital design

…23 3.2 Equalization and the ideal filter… …31 4. RECEIVER EQUALIZATION… …71 4.4 Receiver equalization summary… …74 5. TRANSMITER EQUALIZATION… …FIR eye height equalization ........................... ��. �� 79 4. TX FIR eye…

10 more images…

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APA (6^th Edition):

Nolan, J. E. (2014). Equalization methods to improve performance of low cost copper ethernet channels. (Masters Thesis). California State University – Sacramento. Retrieved from http://hdl.handle.net/10211.3/131782

Chicago Manual of Style (16^th Edition):

Nolan, John Edward. “Equalization methods to improve performance of low cost copper ethernet channels.” 2014. Masters Thesis, California State University – Sacramento. Accessed January 28, 2021. http://hdl.handle.net/10211.3/131782.

MLA Handbook (7^th Edition):

Nolan, John Edward. “Equalization methods to improve performance of low cost copper ethernet channels.” 2014. Web. 28 Jan 2021.

Vancouver:

Nolan JE. Equalization methods to improve performance of low cost copper ethernet channels. [Internet] [Masters thesis]. California State University – Sacramento; 2014. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10211.3/131782.

Council of Science Editors:

Nolan JE. Equalization methods to improve performance of low cost copper ethernet channels. [Masters Thesis]. California State University – Sacramento; 2014. Available from: http://hdl.handle.net/10211.3/131782

Michigan State University

14. Deaton, Phillip J. Digital accessibility in higher education : a review and survey of professionals.

Degree: 2018, Michigan State University

URL: http://etd.lib.msu.edu/islandora/object/etd:16359

►

"This study focuses broadly on addressing the issue of digital accessibility for persons with disabilities in higher education. This study presents a review of research… (more)

Subjects/Keywords: College students with disabilities – Services for; Educational equalization; Digital divide; Internet in education; Higher education administration; Technical communication; Higher education

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APA (6^th Edition):

Deaton, P. J. (2018). Digital accessibility in higher education : a review and survey of professionals. (Thesis). Michigan State University. Retrieved from http://etd.lib.msu.edu/islandora/object/etd:16359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Deaton, Phillip J. “Digital accessibility in higher education : a review and survey of professionals.” 2018. Thesis, Michigan State University. Accessed January 28, 2021. http://etd.lib.msu.edu/islandora/object/etd:16359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Deaton, Phillip J. “Digital accessibility in higher education : a review and survey of professionals.” 2018. Web. 28 Jan 2021.

Vancouver:

Deaton PJ. Digital accessibility in higher education : a review and survey of professionals. [Internet] [Thesis]. Michigan State University; 2018. [cited 2021 Jan 28]. Available from: http://etd.lib.msu.edu/islandora/object/etd:16359.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Deaton PJ. Digital accessibility in higher education : a review and survey of professionals. [Thesis]. Michigan State University; 2018. Available from: http://etd.lib.msu.edu/islandora/object/etd:16359

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

15. Magueta, Roberto Louro. Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems .

Degree: 2020, Universidade de Aveiro

URL: http://hdl.handle.net/10773/29714

► Millimeter wave communications (mmWave) and massive MIMO will be two of the keys enabling technologies for future wireless communication systems. The combination of these technologies… (more)

▼ Millimeter wave communications (mmWave) and massive MIMO will be two of the keys enabling technologies for future wireless communication systems. The combination of these technologies will allow to achieve multi Gb/s needed to meet the quality of service requirements. In this research work we design solutions for mmWave massive MIMO systems, where a set of users equipped with a large number of antennas transmit data to a receiver also equipped with a massive number of antennas. Since we consider a large number of antennas, we cannot use one dedicated RF chain per antenna, due to power consumption and hardware costs. The solution is the use of a hybrid architecture, where the number of RF chains is lower than the number of antennas. In such architecture the processing is distributed by the analog and digital domains (contrary to the conventional fully digital systems). Thus, the conventional fully digital approaches cannot be used in this hybrid architecture where an additional analog filter must be computed and we have additional hardware constraints. Therefore, this research work explores the design of beamforming and equalization techniques assuming massive antenna terminals for mmWave based systems, and to cope with the hardware limitations inherent to this type of systems, three hybrid analog-digital architectures are considered: the fully connected, and the subconnected with fixed or dynamic subarray antennas. A major advantage of the exploration of mmWave bands is to allow larger bandwidths, which lead to larger number of subcarriers for multicarrier based systems. Therefore, the orthogonal frequency division multiplexing (OFDM) technique, which is very efficient to mitigate the effects of inter-symbol interference (ISI) in frequency selective channels, results in a signal with higher amplitude fluctuations, making the large peak-to-average power ratio (PAPR) a problem that should be taken into account for mmWave mMIMO systems. A high PAPR results in strong nonlinear distortions caused by the power amplifier, degrading system performance. To solve the PAPR problem, constant envelope modulations which present a PAPR equal to 0 dB, such as the constant envelope OFDM (CE-OFDM), can be used. Therefore, this research work explores the design of an equalization technique for hybrid analog-digital systems using the CE-OFDM as modulation technique. Additionally, there is significant interest in the design of nonlinear equalizers, that have been considered to efficiently separate the spatial streams and mitigate the inter-carrier-interference (ICI) problem in the current MIMO systems, and that can be extremely efficient in a mMIMO scenario. Iterative block decision feedback equalization (IB-DFE) approach is one of the most promising nonlinear equalization schemes. Therefore, this work explores the IB-DFE principles for the hybrid analog-digital systems. The first part of the thesis is focused on the development of efficient precoding/beamforming and equalization algorithms… Advisors/Committee Members: Silva, Adão Paulo Soares da (advisor), Dinis, Rui Miguel Henriques Dias Morgado (advisor), Castanheira, Daniel Filipe Marques (advisor).

Subjects/Keywords: 5G; Massive MIMO; Millimeter-wave communications; Hybrid analog-digital architectures; Constant envelope OFDM systems; Iterative block equalization

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APA (6^th Edition):

Magueta, R. L. (2020). Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems . (Thesis). Universidade de Aveiro. Retrieved from http://hdl.handle.net/10773/29714

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Magueta, Roberto Louro. “Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems .” 2020. Thesis, Universidade de Aveiro. Accessed January 28, 2021. http://hdl.handle.net/10773/29714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Magueta, Roberto Louro. “Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems .” 2020. Web. 28 Jan 2021.

Vancouver:

Magueta RL. Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems . [Internet] [Thesis]. Universidade de Aveiro; 2020. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10773/29714.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Magueta RL. Hybrid precoding and equalizer techniques for mmWave and massive MIMO based wireless systems . [Thesis]. Universidade de Aveiro; 2020. Available from: http://hdl.handle.net/10773/29714

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

16. Estevan Marcelo Lopes. Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC.

Degree: 2002, Instituto Nacional de Telecomunicações

URL: http://tede.inatel.br/tde_busca/arquivo.php?codArquivo=51

►

A finalidade da presente tese é otimizar o desempenho do sistema de equalização em receptores de televisão digital do padrão ATSC (modulação 8 VSB), tornando-os… (more)

Subjects/Keywords: padrão ATSC; blind equalization.; Equalização adaptativa; Adaptive equalization; TELEINFORMATICA; digital filter; ATSC standard; filtro digital; equalização cega.

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APA (6^th Edition):

Lopes, E. M. (2002). Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC. (Thesis). Instituto Nacional de Telecomunicações. Retrieved from http://tede.inatel.br/tde_busca/arquivo.php?codArquivo=51

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Lopes, Estevan Marcelo. “Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC.” 2002. Thesis, Instituto Nacional de Telecomunicações. Accessed January 28, 2021. http://tede.inatel.br/tde_busca/arquivo.php?codArquivo=51.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Lopes, Estevan Marcelo. “Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC.” 2002. Web. 28 Jan 2021.

Vancouver:

Lopes EM. Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC. [Internet] [Thesis]. Instituto Nacional de Telecomunicações; 2002. [cited 2021 Jan 28]. Available from: http://tede.inatel.br/tde_busca/arquivo.php?codArquivo=51.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Lopes EM. Técnicas de alocação adaptativa do comprimento dos filtros digitais de equalizadores para sistema de HDTV no padrão ATSC. [Thesis]. Instituto Nacional de Telecomunicações; 2002. Available from: http://tede.inatel.br/tde_busca/arquivo.php?codArquivo=51

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Texas A&M University

17. Shafik, Ayman Osama Amin Mohamed. Equalization Architectures for High Speed ADC-Based Serial I/O Receivers.

Degree: PhD, Electrical Engineering, 2016, Texas A&M University

URL: http://hdl.handle.net/1969.1/156875

► The growth in worldwide network traﬃc due to the rise of cloud computing and wireless video consumption has required servers and routers to support increased… (more)

▼ The growth in worldwide network traﬃc due to the rise of cloud computing and wireless video consumption has required servers and routers to support increased serial I/O data rates over legacy channels with signiﬁcant frequency-dependent attenuation. For these high-loss channel applications, ADC-based high-speed links are being considered due to their ability to enable powerful digital signal processing (DSP) algorithms for equalization and symbol detection. Relative to mixed-signal equalizers, digital implementations oﬀer robustness to process, voltage and temperature (PVT) variations, are easier to reconﬁgure, and can leverage CMOS technology scaling in a straight-forward manner. Despite these advantages, ADC-based receivers are generally more complex and have higher power consumption relative to mixed-signal receivers. The ensuing digital equalization can also consume a signiﬁcant amount of power which is comparable to the ADC contribution. Novel techniques to reduce complexity and improve power eﬃciency, both for the ADC and the subsequent digital equalization, are necessary. This dissertation presents eﬃcient modeling and implementation approaches for ADC-based serial I/O receivers. A statistical modeling framework is developed, which is able to capture ADC related errors, including quantization noise, INL/DNL errors and time interleaving mismatch errors. A novel 10GS/s hybrid ADC-based receiver, which combines both embedded and digital equalization, is then presented. Leveraging a time-interleaved asynchronous successive approximation ADC architecture, a new structure for 3-tap embedded FFE inside the ADC with low power/area overhead is used. In addition, a dynamically-enabled digital 4-tap FFE + 3-tap DFE equalizer architecture is introduced, which uses reliable symbol detection to achieve remarkable savings in the digital equalization power. Measurement results over several FR4 channels verify the accuracy of the modeling approach and the eﬀectiveness of the proposed receiver. The comparison of the fabricated prototype against state-of-the-art ADC-based receivers shows the ability of the proposed archi-tecture to compensate for the highest loss channel, while achieving the best power eﬃciency among other works. Advisors/Committee Members: Palermo, Samuel (advisor), Silva-Martinez, Jose (committee member), Chamberland-Tremblay, Jean-Francois (committee member), El-Halwagi, Mahmoud (committee member).

Subjects/Keywords: ADC-Based Receiver; Analog-To-Digital Converter (ADC); Bit-Error Rate (BER); Decision Feedback Equalizer (DFE); Digital Equalization; Embedded Equalization; Feed-Forward Equalizer (FFE); Statistical Modeling; Successive Approximation Register (SAR); Time Interleaving

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APA (6^th Edition):

Shafik, A. O. A. M. (2016). Equalization Architectures for High Speed ADC-Based Serial I/O Receivers. (Doctoral Dissertation). Texas A&M University. Retrieved from http://hdl.handle.net/1969.1/156875

Chicago Manual of Style (16^th Edition):

Shafik, Ayman Osama Amin Mohamed. “Equalization Architectures for High Speed ADC-Based Serial I/O Receivers.” 2016. Doctoral Dissertation, Texas A&M University. Accessed January 28, 2021. http://hdl.handle.net/1969.1/156875.

MLA Handbook (7^th Edition):

Shafik, Ayman Osama Amin Mohamed. “Equalization Architectures for High Speed ADC-Based Serial I/O Receivers.” 2016. Web. 28 Jan 2021.

Vancouver:

Shafik AOAM. Equalization Architectures for High Speed ADC-Based Serial I/O Receivers. [Internet] [Doctoral dissertation]. Texas A&M University; 2016. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/1969.1/156875.

Council of Science Editors:

Shafik AOAM. Equalization Architectures for High Speed ADC-Based Serial I/O Receivers. [Doctoral Dissertation]. Texas A&M University; 2016. Available from: http://hdl.handle.net/1969.1/156875

Universidade Estadual de Campinas

18. Nose-Filho, Kenji, 1986-. Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection.

Degree: 2015, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260845

► Abstract: The blind deconvolution and blind source separation problems are of great relevance due to their interesting theoretical and practical aspects. Moreover, their unsupervised characteristic… (more)

Subjects/Keywords: Separação cega de fontes; Prospecção sismica; Desconvolução; Processamento digital de sinais; Blind equalization; Blind source separation; Seismic prospecting; Deconvolution; Digital signal processing

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APA (6^th Edition):

Nose-Filho, Kenji, 1. (2015). Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/260845

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nose-Filho, Kenji, 1986-. “Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection.” 2015. Thesis, Universidade Estadual de Campinas. Accessed January 28, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260845.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nose-Filho, Kenji, 1986-. “Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection.” 2015. Web. 28 Jan 2021.

Vancouver:

Nose-Filho, Kenji 1. Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection. [Internet] [Thesis]. Universidade Estadual de Campinas; 2015. [cited 2021 Jan 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260845.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nose-Filho, Kenji 1. Desconvolução e separação cega de sinais esparsos e aplicações em sísmica de reflexão: Blind deconvolution and blind source separation of sparse signals and its applications in seismic reflection. [Thesis]. Universidade Estadual de Campinas; 2015. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260845

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

19. Sousa Júnior, Celso de. Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study.

Degree: 2011, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260851

► Abstract: The problem of adaptive equalization is related to the search for iterative solutions that allow the reduction or the elimination of the noxious effects… (more)

▼ Abstract: The problem of adaptive equalization is related to the search for iterative solutions that allow the reduction or the elimination of the noxious effects of a communication channel on a transmitted signal of interest. Since adaptive systems are based on algorithms capable of adjusting the parameters of a filter, the combination between equalizer and learning algorithm can be considered to form a dynamical system, which relates the possibility of obtaining a satisfactory solution to the convergence issue. The analysis of the convergence of adaptive equalization algorithms was developed, typically, considering certain simplifying hypotheses that, however, are not always strictly valid. A classical example that illustrates this assertion is the use of the so-called independence theory. In this work, it has been investigated a distinct approach to the study of stability conditions of classical methods based on Lyapunov theory. This theory is generally employed in the study of nonlinear systems, and presents a significant framework of sound results in the field of adaptive control, which motivates its use in the context of signal processing. The first contribution of this work consists of determining, by means of Lyapunov theory, the range of step-size values that ensure stability of the equalization system for algorithms based on the Wiener criterion and for the constant modulus algorithm. Using the obtained stability results, the convergence region for the parameters estimated via LMS is also investigated, which establishes an interesting connection with the notion of misadjustment. In a second line of study, we present an analysis of the lower bound for the attainable CM cost and an initialization heuristic capable of increasing the probability of convergence to the best optimum engendered by the constant modulus criterion. This strategy is based on a formulation of the unsupervised linear filtering criterion in terms of the application of the Wiener criterion to a polynomial structure. The obtained results reveal that the proposal is able to effectively lead to a performance level that is better than that achieved using the classical center spike method and a random approach Advisors/Committee Members: UNIVERSIDADE ESTADUAL DE CAMPINAS (CRUESP), Romano, João Marcos Travassos, 1960- (advisor), Romano, João Marcos Travassos (advisor), Attux, Romis Ribeiro de Faissol, 1978- (coadvisor), Universidade Estadual de Campinas. Faculdade de Engenharia Elétrica e de Computação (institution), Programa de Pós-Graduação em Engenharia Elétrica (nameofprogram), Cavalcante, Charles Casimiro (committee member), Nascimento, Vitor Heloiz (committee member), Gonçalves, Alim Pedro de Castro (committee member), Val, João Bosco Ribeiro do (committee member).

Subjects/Keywords: Equalizadores (Eletrônica); Estabilidade; Lyapunov, Funções de; Processamento digital de sinais; Algoritmos on-line; Equalization (Electronics); Stability; Lyapunov Theory; Digital signal processing; Online algorithms

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sousa Júnior, C. d. (2011). Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/260851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sousa Júnior, Celso de. “Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study.” 2011. Thesis, Universidade Estadual de Campinas. Accessed January 28, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/260851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sousa Júnior, Celso de. “Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study.” 2011. Web. 28 Jan 2021.

Vancouver:

Sousa Júnior Cd. Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study. [Internet] [Thesis]. Universidade Estadual de Campinas; 2011. [cited 2021 Jan 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260851.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sousa Júnior Cd. Análise de estabilidade de Lyapunov de algoritmos adaptativos com contribuições ao estudo do critério de módulo constante: Lyapunov stability analysis for adaptative algorithms with contributions to constant modulus criteria study. [Thesis]. Universidade Estadual de Campinas; 2011. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/260851

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

20. Šafer, Radim. Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/10719

► The aim of the thesis is to create a digital equalizer with dynamic range compression. The master's thesis is focused on the comparison of functions… (more)

Subjects/Keywords: Digitální signálový procesor; digitální ekvalizace; AD1953; dynamická komprese; UDA1361TS; FT232BM; OP275; Delphi; SigmaStudio; Digital signal processor; digital equalization; AD1953; dynamic range compression; UDA1361TS; FT232BM; OP275; Delphi; SigmaStudio

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Šafer, R. (2019). Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/10719

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Šafer, Radim. “Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression.” 2019. Thesis, Brno University of Technology. Accessed January 28, 2021. http://hdl.handle.net/11012/10719.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Šafer, Radim. “Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression.” 2019. Web. 28 Jan 2021.

Vancouver:

Šafer R. Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11012/10719.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Šafer R. Digitální ekvalizér s kompresorem dynamiky: Digital equalizer with dynamic range compression. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/10719

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brigham Young University

21. Hollis, Timothy Mowry. Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication.

Degree: PhD, 2007, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=2066&context=etd

► This dissertation presents methods for modeling and mitigating voltage noise and timing jitter across high-speed chip-to-chip interconnects. Channel equalization and associated tuning schemes have been… (more)

▼ This dissertation presents methods for modeling and mitigating voltage noise and timing jitter across high-speed chip-to-chip interconnects. Channel equalization and associated tuning schemes have been developed to target the distinct characteristics and signal degradation exhibited in the clock and data signals of multi-Gigabit/second digital communication links. Multiple methods for generating realistically degraded signals for the purpose of simulation are also presented and used to verify the proposed equalization and filtering topologies. Specifically, a new technique for modeling high-speed jittery clocks in the frequency domain is presented and shown to reduce transient simulation time and memory requirements, while simultaneously improving the timing resolution and accuracy of the simulation by minimizing the dependence on the transient simulation time-step. The technique is further developed to provide unprecedented control over the timing characteristics of the generated signals, and is then extended to the generation of random data signals with definable jitter statistics. Through these techniques,realistic clock and data waveforms are constructible, providing for the visualization of the combined effects of voltage and timing degradation, while at the same time tracking the phase relationship between the clock and data signals as they pass across their respective channels and through the receiving circuitry of the communication link. New methods for the automated tuning of second-order continuous-time channel equalizers are proposed based on the simulated or measured single pulse and double pulse responses of the transmission channel. Using only one degree of freedom, the methods target the reduction of inter-symbol interference (ISI) as identified in the single and double pulses. Through tuning either the circuit quality factor (Q), the peaking frequency, or the frequency zero, the methods are shown to adapt to a variety of channel lengths and datarates from the same original equalizer transfer function, implying a good degree of generality, while offering a simple, yet effective, method for ISI reduction. Finally, the design of an active 5 Gigahertz (GHz) bandpass filter, employed for high-speed clock conditioning, is presented and shown to address both random and deterministic components of the clock signal degradation. The bandpass transfer function is achieved through a combination of AC coupling and a resonant LC tank consisting of on-chip interleaved spiral inductors and a tunable capacitor array. Through adjusting the load capacitance in parallel with the inductors, the center frequency of the filter is tunable over a range of nearly 5GHz. The design targets a supply voltage of 1.2 volts and draws approximately 5.7 milliamps of current.

Subjects/Keywords: jitter; signaling; digital communication; circuits; channel equalization; filtering; Electrical and Computer Engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Hollis, T. M. (2007). Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication. (Doctoral Dissertation). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=2066&context=etd

Chicago Manual of Style (16^th Edition):

Hollis, Timothy Mowry. “Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication.” 2007. Doctoral Dissertation, Brigham Young University. Accessed January 28, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=2066&context=etd.

MLA Handbook (7^th Edition):

Hollis, Timothy Mowry. “Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication.” 2007. Web. 28 Jan 2021.

Vancouver:

Hollis TM. Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication. [Internet] [Doctoral dissertation]. Brigham Young University; 2007. [cited 2021 Jan 28]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=2066&context=etd.

Council of Science Editors:

Hollis TM. Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication. [Doctoral Dissertation]. Brigham Young University; 2007. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=2066&context=etd

Universidade do Rio Grande do Sul

22. Aita, Andre Luiz. Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado.

Degree: 1995, Universidade do Rio Grande do Sul

URL: http://hdl.handle.net/10183/25623

►

Este trabalho tem dois propósitos principais. O primeiro compreende o estudo de um equipamento transceptor para viabilizar a transmissão digital de dados duplex a dois… (more)

▼

Este trabalho tem dois propósitos principais. O primeiro compreende o estudo de um equipamento transceptor para viabilizar a transmissão digital de dados duplex a dois fins na malha telefônica comercial instalada. Um estudo inicial da linha de assinante e dos principais métodos de transmissão duplex e realizado. O método de cancelamento de eco e sugerido por conferir ao transceptor melhor desempenho. O transceptor tem a sua estrutura abordada e definida. Além do cancelador, todos os demais circuitos, julgados pelo autor como importantes, são analisados. Dentre os principais estão o codificador 2B1Q, os equalizadores adaptativos e a referencia adaptativa. O segundo propósito compreende o estudo de uma arquitetura capaz de implementar o cancelador do transceptor e sua especificação e simulação. Inicialmente, junto a proposta do equipamento, tipos de canceladores, formas de cancelamento e demais características relacionadas são abordadas. O algoritmo utilizado para a adaptação dos coeficientes e exposto, e, através de simulações, validado. Os problemas decorrentes do use de palavra finita em sistemas digitais sac. considerados. Os procedimentos da operação de cancelamento são especificados e as tarefas distribuídas. Após, finalizando este trabalho, propõe-se a parte operativa, composta por dois processadores, por um banco de registradores e por uma interface de entrada e saída. A arquitetura e descrita em linguagem HDC de descrição de hardware e apos simulada funcionalmente para validação das funções pretendidas. A parte de controle, parcialmente descrita também em HDC, tem algumas características comentadas .

This work has two main goals. The first one is the study of a transceiver equipment to allow two-wire duplex data digital transmission over the existing telephonic network. An initial study of the subscriber line and of the main duplex transmission methods is done. The echo cancellation method is suggested since higher performance transceiver may be obtained. The structure of the transceiver is considered and defined. Besides the echo canceller, all the others circuits deemed important by the author are analysed. The second goal comprehends the study of an architecture capable of implementing the transceiver echo canceller, and its specification and simulation. Initially, gearing to the equipment proposal, the type of cancellers, ways of cancelling and other related characteristics are approached. The algorithm used for the adaptation of coefficients is exposed and validated through simulations. The problems due to the use of finite word length in digital systems are considered. The cancelling operation procedures are specified and the different tasks are distributed. Finally, at the end of this work, the data path, composed of two processors, of a register bank and of an I/O interface, is proposed. The architecture is described in the HDC hardware description language, and later it is simulated for validation of the proposed functions. The control path, partially described in HDC also, has some of its…

Advisors/Committee Members: Bampi, Sergio.

Subjects/Keywords: Echo cancelling; Comunicacao : Dados; Projeto : Circuitos integrados; Adaptive digital filtering; Cancelamento : Eco; Adaptive equalization; Architecture of digital systems

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Aita, A. L. (1995). Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado. (Thesis). Universidade do Rio Grande do Sul. Retrieved from http://hdl.handle.net/10183/25623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Aita, Andre Luiz. “Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado.” 1995. Thesis, Universidade do Rio Grande do Sul. Accessed January 28, 2021. http://hdl.handle.net/10183/25623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Aita, Andre Luiz. “Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado.” 1995. Web. 28 Jan 2021.

Vancouver:

Aita AL. Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado. [Internet] [Thesis]. Universidade do Rio Grande do Sul; 1995. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10183/25623.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Aita AL. Estudo de um transceptor com cancelamento de eco e projeto da arquitetura de um cancelador integrado. [Thesis]. Universidade do Rio Grande do Sul; 1995. Available from: http://hdl.handle.net/10183/25623

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universidade Estadual de Campinas

23. Arthur, Rangel, 1977-. Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments.

Degree: 2007, Universidade Estadual de Campinas

URL: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261230

► Abstract: This thesis deals with the optimization of Digital TV receivers based on OFDM, with performance evaluation in regional single frequency networks (SFN). Such environment… (more)

Subjects/Keywords: Televisão digital; Codificação; Sincronização; Digital TV; OFDM; Single frequency networks; Syncronism; Channel estimation; Adaptive equalization; Turbo coding

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Arthur, Rangel, 1. (2007). Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments. (Thesis). Universidade Estadual de Campinas. Retrieved from http://repositorio.unicamp.br/jspui/handle/REPOSIP/261230

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Arthur, Rangel, 1977-. “Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments.” 2007. Thesis, Universidade Estadual de Campinas. Accessed January 28, 2021. http://repositorio.unicamp.br/jspui/handle/REPOSIP/261230.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Arthur, Rangel, 1977-. “Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments.” 2007. Web. 28 Jan 2021.

Vancouver:

Arthur, Rangel 1. Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments. [Internet] [Thesis]. Universidade Estadual de Campinas; 2007. [cited 2021 Jan 28]. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261230.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Arthur, Rangel 1. Novas propostas para otimização de receptores de TV digital baseados em OFDM em ambientes de redes de frequencia unica regionais: New proposals for optmization of digital TV receivers based on OFDM in regional single frequency network environments. [Thesis]. Universidade Estadual de Campinas; 2007. Available from: http://repositorio.unicamp.br/jspui/handle/REPOSIP/261230

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Pontifical Catholic University of Rio de Janeiro

24. BERNARDO RODRIGUES DA COSTA. [en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS.

Degree: 2008, Pontifical Catholic University of Rio de Janeiro

URL: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11845

►

[pt] A necessidade pela transmissão em altas taxas, por exemplo nos novos sistemas de TV Digital de alta definição, telefonia celular de terceira e quarta… (more)

▼

[pt] A necessidade pela transmissão em altas taxas, por exemplo nos novos sistemas de TV Digital de alta definição, telefonia celular de terceira e quarta geração, DSL e etc, trazem consigo um problema: o aumento dos múltiplos percursos no canal de comunicações (principalmente nas interfaces áereas), dando origem ao fenômeno de interferência intersimbólica (IES). Este trabalho investiga o desempenho de sistemas de transmissão com uma única portadora (SC ou single-carrier) com equalização linear no domínio da freqüência. Diferentes algoritmos recursivos são apresentados para implementar estes filtros FIR. Além dos equalizadores lineares, uma estrutura não-linear é introduzida, onde decisões passadas do decisor de mínima distância são utilizadas para mitigar os efeitos da IES na detecção dos símbolos subseqüentes. Este arranjo é conhecido como equalização/filtragem com decisões realimentadas (DFE ou Decision Feedback Equalizers). Por último, os resultados obtidos com o sistema SC nas diferentes configurações de filtragem na recepção são comparados com os resultados do já estabelecido sistema OFDM. A transmissão OFDM se dá com múltiplas portadoras, onde as freqüências das sub-portadoras são ortogonais entre si, permitindo que a informação seja enviada de forma paralela. Resultados mostram que os sistemas SC-FDE tem desempenho superior aos sistemas OFDM.

[en] The demand for high rate transmission systems, for example in HDTV, third and fourth generation cellular telephony, DSL and so on, causes the rise of a problem: The multipath communications channel (specially in wireless communications), which leads to intersymbol interference phenomenon (ISI). The present work investigates the performance of single-carrier (SC) transmission systems with frequency-domain linear equalization. Different recursive algorithms are presented in order to implement these FIR filters. Besides the linear equalizers, a non- linear structure is introduced, where the past decisions made by the detectors are used to mitigate the effect of ISI on the detection of the forthcoming symbols. This set is known as Decision Feedback Equalizers (DFE). Finally, the results of the aforementioned systems are compared to the well-known OFDM. OFDM transmission relies on sub-carriers, frequency orthogonal to each other, in which the data is sent in a parallel basis. The results obtained show that SC- FDE systems outperform OFDM systems.

Advisors/Committee Members: RAIMUNDO SAMPAIO NETO.

Subjects/Keywords: [pt] TRANSMISSAO DIGITAL; [en] DIGITAL TRANSMISSION; [pt] EQUALIZACAO; [en] EQUALIZATION; [pt] FILTRAGEM ADAPTATIVA; [en] ADAPTIVE FILTERING; [pt] OFDM; [en] OFDM

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

COSTA, B. R. D. (2008). [en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS. (Thesis). Pontifical Catholic University of Rio de Janeiro. Retrieved from http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11845

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

COSTA, BERNARDO RODRIGUES DA. “[en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS.” 2008. Thesis, Pontifical Catholic University of Rio de Janeiro. Accessed January 28, 2021. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11845.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

COSTA, BERNARDO RODRIGUES DA. “[en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS.” 2008. Web. 28 Jan 2021.

Vancouver:

COSTA BRD. [en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS. [Internet] [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2008. [cited 2021 Jan 28]. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11845.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

COSTA BRD. [en] CHANNEL EQUALIZATION IN BLOCK TRANSMISSION SYSTEMS. [Thesis]. Pontifical Catholic University of Rio de Janeiro; 2008. Available from: http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=11845

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Brno University of Technology

25. Málek, Pavel. Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab.

Degree: 2019, Brno University of Technology

URL: http://hdl.handle.net/11012/25406

► Digital Video Broadcasting (standard DVB) is a system for transmission of the television signals in the digital form. There are used a various types of… (more)

Subjects/Keywords: digitální televizní vysílání; digitální modulace; scrambler; konstelační diagram; přenosový mód; ochranný interval; ekvalizace; aditivní šum; vícecestné šíření; digital video broadcasting; digital modulations; scrambler; constellation diagram; transmitting mode; guard interval; equalization; additive noise; multipath transmitting

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Málek, P. (2019). Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/25406

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Málek, Pavel. “Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab.” 2019. Thesis, Brno University of Technology. Accessed January 28, 2021. http://hdl.handle.net/11012/25406.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Málek, Pavel. “Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab.” 2019. Web. 28 Jan 2021.

Vancouver:

Málek P. Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab. [Internet] [Thesis]. Brno University of Technology; 2019. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11012/25406.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Málek P. Modelování vlastností digitálních modulace pro DVB-T v Matlabu: Simulation of the DVB-T digital modulation in Matlab. [Thesis]. Brno University of Technology; 2019. Available from: http://hdl.handle.net/11012/25406

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Rhodes University

26. Dalvit, Lorenzo. Multilingualism and ICT education at Rhodes University: an exploratory study.

Degree: Faculty of Education, Education, 2010, Rhodes University

URL: http://hdl.handle.net/10962/d1003556

► In South Africa, the linguistic hegemony of English over the African languages in the academic field reproduces unequal power relationships between their speakers. The present… (more)

Subjects/Keywords: Educational technology – South Africa; Educational equalization – South Africa; Digital divide – South Africa; Information technology – Social aspects – South Africa; Educational innovations; Information technology – Study and teaching; Language and education – South Africa; Native language and education – South Africa; Rhodes University – Students – Attitudes; Computer science – Study and teaching (Higher)

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Dalvit, L. (2010). Multilingualism and ICT education at Rhodes University: an exploratory study. (Thesis). Rhodes University. Retrieved from http://hdl.handle.net/10962/d1003556

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dalvit, Lorenzo. “Multilingualism and ICT education at Rhodes University: an exploratory study.” 2010. Thesis, Rhodes University. Accessed January 28, 2021. http://hdl.handle.net/10962/d1003556.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dalvit, Lorenzo. “Multilingualism and ICT education at Rhodes University: an exploratory study.” 2010. Web. 28 Jan 2021.

Vancouver:

Dalvit L. Multilingualism and ICT education at Rhodes University: an exploratory study. [Internet] [Thesis]. Rhodes University; 2010. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/10962/d1003556.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dalvit L. Multilingualism and ICT education at Rhodes University: an exploratory study. [Thesis]. Rhodes University; 2010. Available from: http://hdl.handle.net/10962/d1003556

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

27. Song, Zhiguo. Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio.

Degree: Docteur es, Electronique (STIC), 2010, Supélec

URL: http://www.theses.fr/2010SUPL0005

►

Les futures applications de radio cognitive requièrent des systèmes de numérisation capables de convertir alternativement ou simultanément soit une bande très large avec une faible… (more)

▼

Les futures applications de radio cognitive requièrent des systèmes de numérisation capables de convertir alternativement ou simultanément soit une bande très large avec une faible résolution soit une bande plus étroite avec une meilleure résolution, ceci de manière versatile (i.e. par contrôle logiciel). Pour cela, les systèmes de numérisation basés sur les Bancs de Filtres Hybrides (BFH) sont une solution attractive. Ils se composent d'un banc de filtres analogiques, un banc de convertisseurs analogique-numérique et un banc de filtres numériques. Cependant, ils sont très sensibles aux imperfections analogiques. L'objectif de cette thèse était de proposer et d’étudier une méthode de calibration qui permette de corriger les erreurs analogiques dans la partie numérique. De plus, la méthode devait être implémentable dans un système embarqué. Ce travail a abouti à une nouvelle méthode de calibration de BFH utilisant une technique d'Égalisation Adaptative Multi-Voies (EAMV) qui ajuste les coefficients des filtres numériques par rapport aux filtres analogiques réels. Cette méthode requiert d'injecter un signal de test connu à l'entrée du BFH et d'adapter la partie numérique afin de reconstruire le signal de référence correspondant. Selon le type de reconstruction souhaité (d’une large-bande, d’une sous-bande ou d’une bande étroite particulière), nous avons proposé plusieurs signaux de test et de référence. Ces signaux ont été validés en calculant les filtres numériques optimaux par la méthode de Wiener-Hopf et en évaluant leurs performances de ces derniers dans le domaine fréquentiel. Afin d’approcher les filtres numériques optimaux avec une complexité calculatoire minimum, nous avons implémenté un algorithme du gradient stochastique. La robustesse de la méthode a été évaluée en présence de bruit dans la partie analogique et de en tenant compte de la quantification dans la partie numérique. Un signal de test plus robuste au bruit analogique a été proposé. Les nombres de bits nécessaires pour coder les différentes données dans la partie numérique ont été dimensionnés pour atteindre les performances visées (à savoir 14 bits de résolution). Ce travail de thèse a permis d'avancer vers la réalisation des futurs systèmes de numérisation basés sur les BFH.

The future applications of cognitive radio require digitization systems being capable to perform a flexible conversion in terms of bandwidth and Resolution. The digitization systems based on Hybrid Filter Bancs (HFB) provide an attractive solution for achieving this purpose. The HFBs consist of a bank of analog filters, a bank of analog/digital converters and a bank of digital filters. However, they are so sensitive that the presence of analog errors renders them impossible to carry out. Therefore, the goal of the thesis was to propose and study a calibration method for the analog errors to be corrected in the digital part. Furthermore, the proposed method had to be implementable in an embedded system. Based on Multichannel Adaptive Equalization (MCAE), we proposed a new…

Advisors/Committee Members: Bénabes, Philippe (thesis director).

Subjects/Keywords: Conversion analogique/numérique; Bancs de filtres hybrides; Focalisation spectrale; Sensibilité aux erreurs analogiques; Égalisation adaptative multi-voies; Calibration; Robustesse au bruit additif; Implémentation d'algorithmes; Analog-digital conversion; Hybrid filters bancs; Spectral focusing; Analogs errors; Multichannel Adaptive Equalization (MCAE),; Calibration; Additive noise; Algorithm; 378.242

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Song, Z. (2010). Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio. (Doctoral Dissertation). Supélec. Retrieved from http://www.theses.fr/2010SUPL0005

Chicago Manual of Style (16^th Edition):

Song, Zhiguo. “Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio.” 2010. Doctoral Dissertation, Supélec. Accessed January 28, 2021. http://www.theses.fr/2010SUPL0005.

MLA Handbook (7^th Edition):

Song, Zhiguo. “Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio.” 2010. Web. 28 Jan 2021.

Vancouver:

Song Z. Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio. [Internet] [Doctoral dissertation]. Supélec; 2010. [cited 2021 Jan 28]. Available from: http://www.theses.fr/2010SUPL0005.

Council of Science Editors:

Song Z. Systèmes de numérisation hautes performances – Architectures robustes adaptées à la radio cognitive. : High performance digitization systems - robust architecture adapted to the cognitive radio. [Doctoral Dissertation]. Supélec; 2010. Available from: http://www.theses.fr/2010SUPL0005

28. Skidén, Ottar Pehrson. Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images.

Degree: The Institute of Technology, 2010, Linköping UniversityLinköping University

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56630

► To properly display digital X-ray images for visual diagnosis, a proper display range needs to be identified. This can be difficult when the image… (more)

Subjects/Keywords: image processing; weight; histogram equalization; digital X-ray image; contrast setting; local; Medical engineering; Medicinsk teknik

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APA (6^th Edition):

Skidén, O. P. (2010). Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images. (Thesis). Linköping UniversityLinköping University. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56630

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Skidén, Ottar Pehrson. “Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images.” 2010. Thesis, Linköping UniversityLinköping University. Accessed January 28, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56630.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Skidén, Ottar Pehrson. “Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images.” 2010. Web. 28 Jan 2021.

Vancouver:

Skidén OP. Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images. [Internet] [Thesis]. Linköping UniversityLinköping University; 2010. [cited 2021 Jan 28]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56630.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Skidén OP. Automatic Exposure Correction And Local Contrast Setting For Diagnostic Viewing of Medical X-ray Images. [Thesis]. Linköping UniversityLinköping University; 2010. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-56630

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Lund

29. Prlja, Adnan. Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels.

Degree: 2013, University of Lund

URL: https://lup.lub.lu.se/record/3441332 ; https://portal.research.lu.se/ws/files/3525903/3447172.pdf

► Fast and reliable data transmission together with high bandwidth efficiency are important design aspects in a modern digital communication system. Many different approaches exist but… (more)

▼ Fast and reliable data transmission together with high bandwidth efficiency are important design aspects in a modern digital communication system. Many different approaches exist but in this thesis bandwidth efficiency is obtained by increasing the data transmission rate with the faster-than-Nyquist (FTN) framework while keeping a fixed power spectral density (PSD). In FTN consecutive information carrying symbols can overlap in time and in that way introduce a controlled amount of intentional intersymbol interference (ISI). This technique was introduced already in 1975 by Mazo and has since then been extended in many directions. Since the ISI stemming from practical FTN signaling can be of significant duration, optimum detection with traditional methods is often prohibitively complex, and alternative equalization methods with acceptable complexity-performance tradeoffs are needed. The key objective of this thesis is therefore to design reduced-complexity receivers for FTN and general linear channels that achieve optimal or near-optimal performance. Although the performance of a detector can be measured by several means, this thesis is restricted to bit error rate (BER) and mutual information results. FTN signaling is applied in two ways: As a separate uncoded narrowband communication system or in a coded scenario consisting of a convolutional encoder, interleaver and the inner ISI mechanism in serial concatenation. Turbo equalization where soft information in the form of log likelihood ratios (LLRs) is exchanged between the equalizer and the decoder is a commonly used decoding technique for coded FTN signals. The first part of the thesis considers receivers and arising stability problems when working within the white noise constraint. New M-BCJR algorithms for turbo equalization are proposed and compared to reduced-trellis VA and BCJR benchmarks based on an offset label idea. By adding a third low-complexity M-BCJR recursion, LLR quality is improved for practical values of M. M here measures the reduced number of BCJR computations for each data symbol. An improvement of the minimum phase conversion that sharpens the focus of the ISI model energy is proposed. When combined with a delayed and slightly mismatched receiver, the decoding allows a smaller M without significant loss in BER. The second part analyzes the effect of the internal metric calculations on the performance of Forney- and Ungerboeck-based reduced-complexity equalizers of the M-algorithm type for both ISI and multiple-input multiple-output (MIMO) channels. Even though the final output of a full-complexity equalizer is identical for both models, the internal metric calculations are in general different. Hence, suboptimum methods need not produce the same final output. Additionally, new models working in between the two extremes are proposed and evaluated. Note that the choice of observation model does not impact the detection complexity as the underlying algorithm is unaltered. The last part of the thesis is devoted to a different complexity reducing…

Subjects/Keywords: Electrical Engineering, Electronic Engineering, Information Engineering; Digital data transmission; receivers; decoders; channel modeling; intersymbol interference; ISI; MIMO; Faster-than-Nyquist signaling; complexity reduction; observation models; BCJR algorithm; turbo equalization; iterative detection; channel shortening

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Prlja, A. (2013). Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels. (Doctoral Dissertation). University of Lund. Retrieved from https://lup.lub.lu.se/record/3441332 ; https://portal.research.lu.se/ws/files/3525903/3447172.pdf

Chicago Manual of Style (16^th Edition):

Prlja, Adnan. “Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels.” 2013. Doctoral Dissertation, University of Lund. Accessed January 28, 2021. https://lup.lub.lu.se/record/3441332 ; https://portal.research.lu.se/ws/files/3525903/3447172.pdf.

MLA Handbook (7^th Edition):

Prlja, Adnan. “Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels.” 2013. Web. 28 Jan 2021.

Vancouver:

Prlja A. Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels. [Internet] [Doctoral dissertation]. University of Lund; 2013. [cited 2021 Jan 28]. Available from: https://lup.lub.lu.se/record/3441332 ; https://portal.research.lu.se/ws/files/3525903/3447172.pdf.

Council of Science Editors:

Prlja A. Reduced Receivers for Faster-than-Nyquist Signaling and General Linear Channels. [Doctoral Dissertation]. University of Lund; 2013. Available from: https://lup.lub.lu.se/record/3441332 ; https://portal.research.lu.se/ws/files/3525903/3447172.pdf

Brno University of Technology

30. Martišek, Karel. Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing.

Degree: 2018, Brno University of Technology

URL: http://hdl.handle.net/11012/11241

► The thesis is concerned with filters for visualization of high dynamic range images. In the theoretical part, the principle of confocal microscopy is described and… (more)

Subjects/Keywords: HDR obrazy – konfokální mikroskopie – PSF – digitální obraz – DFT – frekvenční filtry – adaptivní ekvalizace histogramu – aditivní šum – 3-D rekonstrukce objektu; HDR images – confocal microscopy – PSF – digital image – DFT – frequency filters – adaptive histogram equalization – additive noise – 3-D object reconstruction

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Martišek, K. (2018). Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing. (Thesis). Brno University of Technology. Retrieved from http://hdl.handle.net/11012/11241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Martišek, Karel. “Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing.” 2018. Thesis, Brno University of Technology. Accessed January 28, 2021. http://hdl.handle.net/11012/11241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Martišek, Karel. “Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing.” 2018. Web. 28 Jan 2021.

Vancouver:

Martišek K. Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing. [Internet] [Thesis]. Brno University of Technology; 2018. [cited 2021 Jan 28]. Available from: http://hdl.handle.net/11012/11241.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Martišek K. Adaptive Filters for 2-D and 3-D Digital Images Processing: Adaptive Filters for 2-D and 3-D Digital Images Processing. [Thesis]. Brno University of Technology; 2018. Available from: http://hdl.handle.net/11012/11241

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Open Access Theses and Dissertations