subject:(radio frequency interference)

Stellenbosch University

1. Wolfaardt, Cornelis Johannes. Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy.

Degree: MEng, Electrical and Electronic Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98464

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ENGLISH ABSTRACT: Radio frequency interference (RFI) presents a large problem for radio telescopes. Interference prevents observations from being made, or extends the duration required for… (more)

Subjects/Keywords: Radio astronomy; UCTD; Radio – Interference; Electromagnetic interference; Radio – Transmitters and transmission; Radio – Antennas; Radio - Recievers and reception; Radio frequency interference

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

APA (6^th Edition):

Wolfaardt, C. J. (2016). Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98464

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):

Wolfaardt, Cornelis Johannes. “Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy.” 2016. Thesis, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/98464.

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

MLA Handbook (7^th Edition):

Wolfaardt, Cornelis Johannes. “Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy.” 2016. Web. 19 Jan 2021.

Vancouver:

Wolfaardt CJ. Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/98464.

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

Council of Science Editors:

Wolfaardt CJ. Machine learning approach to radio frequency interference(RFI) classification in Radio Astronomy. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98464

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

University of Johannesburg

2. Wolmarans, Pieter Johannes. Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters.

Degree: 2009, University of Johannesburg

URL: http://hdl.handle.net/10210/2187

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M.Ing.

In power electronics most applications are custom designed. Even though similar topologies are used, each application is designed to fit specific requirements. Presently there… (more)

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M.Ing.

In power electronics most applications are custom designed. Even though similar topologies are used, each application is designed to fit specific requirements. Presently there is a move towards standard modules that can be connected together to perform the desired power conversion, in much the same way as IC’s have been used for a few decades now. It is important to ensure that the modules can work together without performance degradation. The close proximity of active, passive and logic devices in high power applications dramatically increases the risk of EMI between the various components. This document describes the design and characterisation of a planar conducted RF-EMI power line filter to be used between modules and between modules and power supplies. The filter consists of two sets of transmission lines in parallel. The first is a high permittivity material with nickel conductors, referred to as the attenuator. The second is a set of copper conductors that are placed on the outside of the attenuator. The filter must be able to remove conducted differential mode noise from power line to the module and from the module tot the power line. The filter dimensions are comparable to the wavelengths that have to be attenuated. This allows for a possible combination of RF filtering techniques and power line filtering techniques. The design of the filter and the electromagnetic effects that govern its behaviour is explained. The transfer characteristic of the filter is made possible by the choice of materials and their relation to each other. Each material is discussed and evaluated. Characterisation methods are described and results presented. The influence the materials have on the performance of the filter and the methods and problems of construction of the filter are discussed. The construction of the filter and the commercial processes available are discussed. A prototype filter was built to demonstrate the feasibility of the construction processes. The performance of the prototype filter was then measured. The various test set-ups for different applications are explained. Small signal tests in 50 W systems were used to allow for comparisons with other filter types. The prototype has minimal insertion loss in the pass band and an average slope of attenuation of 40 dB/decade beyond the corner frequency. The corner frequency is at 1 MHz. Transmission line theory is used to develop a distributed element model for the filter using the ABCD-matrix representation of transmission lines. From this matrix an equivalent P-model can be calculated. Applicable assumptions are made to simplify the equations and values for a lumped element P-model is calculated. Both models indicate the importance that the material parameters have on the performance of the simulation results. Good correlation between the measured performance and simulated performance is established. The material parameters are sensitive to temperature. A one-dimensional thermal model is presented to estimate the operating temperature of the filter. It…

Subjects/Keywords: Radio frequency; Electric current converters; Electromagnetic interference

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APA (6^th Edition):

Wolmarans, P. J. (2009). Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters. (Thesis). University of Johannesburg. Retrieved from http://hdl.handle.net/10210/2187

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):

Wolmarans, Pieter Johannes. “Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters.” 2009. Thesis, University of Johannesburg. Accessed January 19, 2021. http://hdl.handle.net/10210/2187.

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

MLA Handbook (7^th Edition):

Wolmarans, Pieter Johannes. “Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters.” 2009. Web. 19 Jan 2021.

Vancouver:

Wolmarans PJ. Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters. [Internet] [Thesis]. University of Johannesburg; 2009. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10210/2187.

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

Council of Science Editors:

Wolmarans PJ. Investigation of a class of distributed planar conducted RF-EMI filters for integration in power electronic converters. [Thesis]. University of Johannesburg; 2009. Available from: http://hdl.handle.net/10210/2187

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

Stellenbosch University

3. Combrink, Stephanus Lucas. Calibration of large Rogowski coils.

Degree: MEng, Electrical and Electronic Engineering, 2016, Stellenbosch University

URL: http://hdl.handle.net/10019.1/98550

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ENGLISH ABSTRACT: The Square Kilometre Array aims to be the world’s largest radio telescope. South Africa will host the mid to high frequency division of… (more)

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ENGLISH ABSTRACT: The Square Kilometre Array aims to be the world’s largest radio telescope. South Africa will host the mid to high frequency division of the SKA and the core site will be populated with 64 offset Gregorian radio telescopes for the first phase. To achieve a resolution 50 times higher than the Hubble Space Telescope, radio frequency interference (RFI) must be kept as low as possible. Past and present studies are committed to keep the introduced and already present RFI as low as possible. Our study stems from a previous study on RFI originating from lightning (induced) currents. The study examined KAT-7, the precursor to MeerKAT, extensively and from it valuable recommendations were made. This study also gave rise to the creation of a Rogowski coil (RC) for current measurements. The RC is physically large to be able to fit around antenna struts. However, calibration was not considered for that study. Since current measurements on antenna struts are still of interest, it gives rise to our investigation into the calibration of the large RC for accurate measurements. The study begins by analysing a frequency domain (FD) method commonly used by current probe manufacturers. Good agreement between a theoretical model, simulation and measurement is obtained, but without proper de-embedding, the method is only accurate at frequencies up to 100 MHz. To extend the frequency range, a time domain (TD) technique is applied where the signals are analysed in the TD and unwanted responses are gated out, providing accurate calibration to much higher frequency. Both approaches are verified with calibration data and measurements of two commercial current probes. To improve RC calibration accuracy, an attempt is made to reduce the main mismatch reflection between the measurement device and calibration fixture. A high permittivity dielectric is investigated which, unfortunately, produced inconclusive results. Using a larger diameter conductor with a matching profile resulted in a decrease in reflection magnitude as expected. However, the matching profile introduced sub-reflections. To avoid uncertainty due to sub-reflections, the large RC was calibrated without the matching profile. To achieve a good calibration over all frequencies, a hybridised method is applied which uses the results from the frequency ranges where each method provides the most accurate calibration results, low frequency from the FD method and the higher frequency from the TD method.

AFRIKAANSE OPSOMMING: Die Vierkante-Kilometer Reeks (VKR) gaan die wêreld se grootse radio teleskoop wees, waarvan Suid-Afrika die middel tot hoë frekwensie afdeling van die VKR huisves. Vir die eerste fase sal die kern area bevolk word met 64 Gregorian-afset radio teleskope. Om ’n resolusie van 50 keer hoër as die Hubble ruimte teleskoop te behaal moet die radio frekwensie steurings (RFS) so laag as moontlik behou word. Dit word verseker deur vorige en voortgaande studies. ’n Spesifieke vorige studie het gekyk na RFS van weerlig (geïnduseerde) strome op…

Advisors/Committee Members: Wiid, P. G., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: Rogowski coils – Calibration; Radio telescopes; Radio frequency; Radio – Interference; Radio – Transmitters and transmission; UCTD

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

APA (6^th Edition):

Combrink, S. L. (2016). Calibration of large Rogowski coils. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/98550

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):

Combrink, Stephanus Lucas. “Calibration of large Rogowski coils.” 2016. Thesis, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/98550.

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

MLA Handbook (7^th Edition):

Combrink, Stephanus Lucas. “Calibration of large Rogowski coils.” 2016. Web. 19 Jan 2021.

Vancouver:

Combrink SL. Calibration of large Rogowski coils. [Internet] [Thesis]. Stellenbosch University; 2016. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/98550.

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

Council of Science Editors:

Combrink SL. Calibration of large Rogowski coils. [Thesis]. Stellenbosch University; 2016. Available from: http://hdl.handle.net/10019.1/98550

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

Stellenbosch University

4. Koech, Jackline C. Modifed horn-type antennas for SKA RFI Monitoring.

Degree: MEng, Electrical and Electronic Engineering, 2019, Stellenbosch University

URL: http://hdl.handle.net/10019.1/107117

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ENGLISH ABSTRACT: Maintaining a site free of radio frequency interference (RFI) is an essential aspect in the performance of the Square Kilometre Array (SKA) radio… (more)

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ENGLISH ABSTRACT: Maintaining a site free of radio frequency interference (RFI) is an essential aspect in the performance of the Square Kilometre Array (SKA) radio telescope. Regular on-site RFI measurements have to be done to identify unwanted sources of RFI and to verify RFIcompliance of equipment within the operating frequencies of the telescope. To perform these measurements requires hyperband directional antennas that cover all the frequencies of the first phase of SKA-MID are required, ideally 200 MHz - 4 GHz, a bandwidth ratio of 20:1. In addition, they need to be mechanically robust and portable, since they often need to be mounted at a height for testing. For this application, we investigate three types of modified horn antennas: a doubleridged guide-horn (DRGH), a transverse electromagnetic (TEM) horn, and a Valentine antenna. These antennas are chosen because of their bandwidth and gain. A wideband coaxial to parallel-plate transition is also designed for feeding the Valentine and TEM horn antennas because of their symmetry. The three antennas are modelled, simulated in Dassault Systémes' CST Studio Suite and prototyped to analyse the complexity of construction and to compare measurement results with those simulated. The measured return loss, radiation patterns and gain results are a good replication of the simulated results. A surrogate-based optimization (SBO) scheme that uses Kriging model and Expected Improvement (EI) was used to optimize the antennas for return loss. Designing these structures using the normal supervised parametric sweeps is impractical due to the lengthy simulation times involved because of the wide bandwidth and large geometry. An SBO only requires a few full wave simulations of the structure to support the Kriging model, while each new simulation requested by the iterative process is selected at a position in the design space where the optimum solution is most likely, given the current estimation of the response. Using this technique, the return loss of the three antennas has been optimized and bandwidth ratio improved from 10 to 16. An analysis of the three antennas is done by comparing the fabrication process, the size, robustness and weight of the antennas, the ease of characterization and the performance of the antenna. Based on this analysis, the DRGH is recommended for RFI testing at the SKA radio telescope site.

AFRIKAANSE OPSOMMING: Die instandhouding van 'n terrein vry van radiofrekwensie-steurings (RFS) is 'n wesenlike aspek in die uitvoering van die Vierkante Kilometer Reeks (SKA). Gereëlde RFS-metings moet op die terrein gedoen word om ongewenste bronne van RFS te identifiseer en om die RFS-nakoming van toerusting binne die gebruiksfrekwensies van die teleskoop te verifieer. Om hierdie metings uit te voer, verg dit hiperband gerigte antennas wat al die frekwensies van die eerste fase van SKA-MID dek, verkieslik 200 MHz - 4 GHz, 'n bandwydteverhouding van 20:1. Daarbenewens moet hulle meganies robuust en draagbaar wees, aangesien hulle dikwels op 'n…

Advisors/Committee Members: De Villiers, Dirk I. L., Wiid, Gideon P., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Radio frequency interference; Radio telescopes; Electromagnetic waves; Transverse waves

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

APA (6^th Edition):

Koech, J. C. (2019). Modifed horn-type antennas for SKA RFI Monitoring. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/107117

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):

Koech, Jackline C. “Modifed horn-type antennas for SKA RFI Monitoring.” 2019. Thesis, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/107117.

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

MLA Handbook (7^th Edition):

Koech, Jackline C. “Modifed horn-type antennas for SKA RFI Monitoring.” 2019. Web. 19 Jan 2021.

Vancouver:

Koech JC. Modifed horn-type antennas for SKA RFI Monitoring. [Internet] [Thesis]. Stellenbosch University; 2019. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/107117.

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

Council of Science Editors:

Koech JC. Modifed horn-type antennas for SKA RFI Monitoring. [Thesis]. Stellenbosch University; 2019. Available from: http://hdl.handle.net/10019.1/107117

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

Stellenbosch University

5. Phiri, Temwani Joshua. Characterising the electromagnetic environment of MeerKAT.

Degree: PhD, Electrical and Electronic Engineering, 2017, Stellenbosch University

URL: http://hdl.handle.net/10019.1/101040

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ENGLISH ABSTRACT: MeerKAT is South Africa’s 64-dish precursor radio telescope to the Square Kilometre Array (SKA), currently under construction in the semi-desert Karoo region. As… (more)

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ENGLISH ABSTRACT: MeerKAT is South Africa’s 64-dish precursor radio telescope to the Square Kilometre Array (SKA), currently under construction in the semi-desert Karoo region. As these are new generation instruments, their specifications far exceed those of existing telescopes and thereby increases their susceptibility to radio frequency interference (RFI). So far, much has been accomplished in terms of electromagnetic compatibility (EMC) interventions. However, surveys in the recent past have indicated the need to examine signal propagation in the Karoo in greater detail. In particular, reliable predictive tools are essential in order to fully characterize the environment which is changing gradually as infrastructure development progresses. As a matter of first importance, selected empirical propagation models were statistically assessed by comparison to measurements in the Karoo. Based on the root mean square error (RMSE) values, the transmission loss predictions were deemed reliable. In spite of this, the limitations of empirical modelling were apparent: failure to accurately model real ground, inability to incorporate scattering phenomena and inadequacy in representing underlying physical processes. To meet the accuracy demands of the South African SKA Project (SKA-SA) pertaining to characterising the complex environment of MeerKAT, a deterministic model exploiting full-wave and asymptotic techniques was developed. Referred to simply as a ray model, this solution utilised the method of moments (MoM) to determine antenna characteristics and solve for real ground, while physical optics was utilised to address scattering from the dishes. With the software FEKO as the interface and simulation engine, the MeerKAT core was reproduced computationally. Analysis of the numeric data revealed the full extent of electromagnetic complexity in relation to multipath. Most notably, high spatial resolution attenuation maps were generated, revealing high and low risk regions. This has benefits for identification of potential RFI problems. The ray model showed very good performance when examined against measurements (RMSE <4 dB). This is highly advantageous since numerical modelling allows a lot more flexibility than physical testing permits. In particular, the novelty and significance of this research is the ability to reproduce an actual deployment scenario with precision and high accuracy.

AFRIKAANSE OPSOMMING: Meerkat is Suid-Afrika se 64-skottel voorloper tot die Square Kilometre Array (SKA) radioteleskoop, wat tans in die semi-woestyn Karoo gebied gebou word. Omdat hierdie nuwe generasie instrumente is, oorskry hul spesifikasies dié van bestaande teleskope by verre, dus is hul vatbaarheid vir beide radiofrekwensie steurings (RFS) verhoog. Tot dusver is daar baie vermag in terme van elektromagnetiese versoenbaarheid (EMV) stappe. Onlangse opnames het egter gelei tot die behoefte aan verdere ondersoek van seinvoortplanting in die Karoo. In besonder is daar ’n behoefte aan betroubare…

Advisors/Committee Members: Davidson, David, Wiid, Gideon, Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Electromagnetic fields; Radio telescopes; Radio frequency interference

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

APA (6^th Edition):

Phiri, T. J. (2017). Characterising the electromagnetic environment of MeerKAT. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/101040

Chicago Manual of Style (16^th Edition):

Phiri, Temwani Joshua. “Characterising the electromagnetic environment of MeerKAT.” 2017. Doctoral Dissertation, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/101040.

MLA Handbook (7^th Edition):

Phiri, Temwani Joshua. “Characterising the electromagnetic environment of MeerKAT.” 2017. Web. 19 Jan 2021.

Vancouver:

Phiri TJ. Characterising the electromagnetic environment of MeerKAT. [Internet] [Doctoral dissertation]. Stellenbosch University; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/101040.

Council of Science Editors:

Phiri TJ. Characterising the electromagnetic environment of MeerKAT. [Doctoral Dissertation]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/101040

6. Steeb, Jan-Willem W. Localization and ,litigation of radio frequency interference for interferometric arrays.

Degree: PhD, Electrical and Electronic Engineering, 2018, Stellenbosch University

URL: http://hdl.handle.net/10019.1/104989

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ENGLISH ABSTRACT: Radio telescopes have increased exponentially in sensitivity ever since the first single dish radio telescopes were built in the 1930's. This trend continues… (more)

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ENGLISH ABSTRACT: Radio telescopes have increased exponentially in sensitivity ever since the first single dish radio telescopes were built in the 1930's. This trend continues with the development of next generation telescopes such as the Square Kilometre Array (SKA). Parallel to the development of radio telescopes, has been the rapid expansion of telecommunication technologies. Consequently, radio telescopes are becoming more sensitive in an environment with ever increasing radio frequency interference (RFI). The ideal solution to RFI that is detected by a radio telescope is to locate its source and then have it removed. Removal of the source is usually only possible if it is occurring in a protected band or the radio telescope is in a radio quiet zone. Unfortunately, most of the radio spectrum has been allocated to active communication services and not all radio telescopes are in radio quiet zones. The alternative is to mitigate its effect using methods such as spatial RFI mitigation. The contributions of this PhD dissertation are twofold: firstly, a source localization algorithm that takes into account the constraints and advantages of the arrays used for radio astronomy has been developed; and secondly, existing spatial RFI mitigation techniques have been adapted to take into account the bandwidth of the RFI signals. The computationally efficient localization algorithm that was developed is best suited for interferometric arrays with low array beam sidelobes. Two variants of the algorithm were developed, one that works for sources in the near-field and the other for far-field sources. In the near-field, the computational complexity of the algorithm is linear with search grid size compared to cubic scaling of the state-of-the-art 3-D MUSIC method. The trade-off is that the proposed algorithm requires a once-off a priori calculation and storing of weighting matrices. In an experiment using a station of the Low Frequency Array (LOFAR) a hexacopter was flown around the array, at a mean radial distance of 190 m, broadcasting a signal. The mean error in distance between the estimated position of the hexacopter and the GPS position of the hexacopter was 2 m for a wavelength of 6.7 m. The non-narrowband RFI mitigation method developed consists of a second order filter that is used to mitigate powerful RFI with bandwidth sufficient to cause aberrations that are below the noise, but with power that competes with the astronomical sources. The second order filter consists of a first order subspace subtraction filter combined with a flat frequency response model for the RFI source. Taking into account mutual coupling as well as a calibration step to account for unknown complex gains, the algorithm was found to process approximately 1.6 times more bandwidth than using just a first order subspace subtraction filter.

AFRIKAANSE OPSOMMING: Sedert die eerste enkelskottel radioteleskope in die 1930's gebou is, het die sensitiwiteit van radioteleskope eksponensieël toegeneem. Hierdie tendens gaan voort met…

Advisors/Committee Members: Davidson, David B., Wijnholds, Stefan J., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Radio telescopes; Telecommunication systems; Radio frequency interference; Localized waves

12 more images…

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

APA (6^th Edition):

Steeb, J. W. (2018). Localization and ,litigation of radio frequency interference for interferometric arrays. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/104989

Chicago Manual of Style (16^th Edition):

Steeb, Jan-Willem W. “Localization and ,litigation of radio frequency interference for interferometric arrays.” 2018. Doctoral Dissertation, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/104989.

MLA Handbook (7^th Edition):

Steeb, Jan-Willem W. “Localization and ,litigation of radio frequency interference for interferometric arrays.” 2018. Web. 19 Jan 2021.

Vancouver:

Steeb JW. Localization and ,litigation of radio frequency interference for interferometric arrays. [Internet] [Doctoral dissertation]. Stellenbosch University; 2018. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/104989.

Council of Science Editors:

Steeb JW. Localization and ,litigation of radio frequency interference for interferometric arrays. [Doctoral Dissertation]. Stellenbosch University; 2018. Available from: http://hdl.handle.net/10019.1/104989

Georgia Tech

7. Omer, Mohammad. Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs.

Degree: PhD, Electrical and Computer Engineering, 2013, Georgia Tech

URL: http://hdl.handle.net/1853/51938

► This thesis has sought to provide another look at RF interference at the fundamental level. While previous interference control and regulation methods have existed in… (more)

Subjects/Keywords: RF; Nonlinear modeling; PAPR; Volterra series; Adaptive filters; Radio frequency integrated circuits; Radio Interference; Radio frequency; Wireless communication systems

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

APA (6^th Edition):

Omer, M. (2013). Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/51938

Chicago Manual of Style (16^th Edition):

Omer, Mohammad. “Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs.” 2013. Doctoral Dissertation, Georgia Tech. Accessed January 19, 2021. http://hdl.handle.net/1853/51938.

MLA Handbook (7^th Edition):

Omer, Mohammad. “Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs.” 2013. Web. 19 Jan 2021.

Vancouver:

Omer M. Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs. [Internet] [Doctoral dissertation]. Georgia Tech; 2013. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1853/51938.

Council of Science Editors:

Omer M. Towards harmonious coexistence : linear and nonlinear techniques for interference management in RFICs. [Doctoral Dissertation]. Georgia Tech; 2013. Available from: http://hdl.handle.net/1853/51938

Princeton University

8. Chang, Matthew. A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration .

Degree: PhD, 2017, Princeton University

URL: http://arks.princeton.edu/ark:/88435/dsp01c821gn289

► This thesis is a comprehensive portfolio of work on a Microwave Photonic Self-Interference Canceller (MPC), a specialized optical system designed to eliminate interference from radio-frequency… (more)

Subjects/Keywords: Interference Cancellation; Microwave Photonics; Photonic integrated circuits; Radio-Frequency Communications; Self-Interference

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

APA (6^th Edition):

Chang, M. (2017). A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration . (Doctoral Dissertation). Princeton University. Retrieved from http://arks.princeton.edu/ark:/88435/dsp01c821gn289

Chicago Manual of Style (16^th Edition):

Chang, Matthew. “A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration .” 2017. Doctoral Dissertation, Princeton University. Accessed January 19, 2021. http://arks.princeton.edu/ark:/88435/dsp01c821gn289.

MLA Handbook (7^th Edition):

Chang, Matthew. “A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration .” 2017. Web. 19 Jan 2021.

Vancouver:

Chang M. A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration . [Internet] [Doctoral dissertation]. Princeton University; 2017. [cited 2021 Jan 19]. Available from: http://arks.princeton.edu/ark:/88435/dsp01c821gn289.

Council of Science Editors:

Chang M. A Microwave Photonic Interference Canceller: Architectures, Systems, and Integration . [Doctoral Dissertation]. Princeton University; 2017. Available from: http://arks.princeton.edu/ark:/88435/dsp01c821gn289

University of Alberta

9. Lamey, Michael. Radio frequency noise studies for a linac-MRI system.

Degree: PhD, Department of Physics, 2010, University of Alberta

URL: https://era.library.ualberta.ca/files/n583xv11k

► A prototype system which has integrated a linear accelerator (linac) with a magnetic resonance imager (MRI) has been constructed at the Cross Cancer Institute. The… (more)

▼ A prototype system which has integrated a linear accelerator (linac) with a magnetic resonance imager (MRI) has been constructed at the Cross Cancer Institute. The real time operation of a linac-MRI system will require proper radio frequency (RF) shielding such that the MRI images can be acquired without extraneous RF noise from the linac. This thesis reports on the steps taken to successfully RF-shield the linac from the MRI such that the two devices can operate independently of one another. The RF noise from functioning multileaf collimators (MLC) is measured using near field probes and MRI images are acquired with the MLC near the MRI. This included measuring the RF noise as a function of applied magnetic field strength. Several measurement and simulation scenarios are discussed to determine the major sources of RF noise generation from the modulator of a linac. Finally RF power density levels are reported internally and externally to the RF cage which houses the linac and the MRI. The shielding effectiveness of the RF cage has been measured in the frequency range 1 – 50 MHz and is presented. MRI images of two phantoms are presented during linac operation. The MLC studies illustrate that the small RF noise produced by functioning MLC motors can be effectively shielded to avoid signal-to-noise degradation in the MRI image. A functioning MLC can be incorporated into a linac-MRI unit. The RF noise source investigations of the modulator of a linac illustrate that the major source of RF noise involves the operation of a magnetron. These studies also eliminate the pulse forming network (PFN) coil and the grid voltage spikes on the thyratron as possible major sources of RF noise. The main result is that for linac-MRI systems the modulator of a linac should be housed in a separate RF cage from the MRI. Finally imaging work with the linac operating illustrates that the accelerating structure of a linac and an MRI can be housed within the same RF cage. The 6 MV linac can be operated to produce radiation with no experientially measurable degradation in image quality due to RF effects.

Subjects/Keywords: interference; MRI; image guidance; Radio frequency; linac; IMRT

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APA (6^th Edition):

Lamey, M. (2010). Radio frequency noise studies for a linac-MRI system. (Doctoral Dissertation). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/n583xv11k

Chicago Manual of Style (16^th Edition):

Lamey, Michael. “Radio frequency noise studies for a linac-MRI system.” 2010. Doctoral Dissertation, University of Alberta. Accessed January 19, 2021. https://era.library.ualberta.ca/files/n583xv11k.

MLA Handbook (7^th Edition):

Lamey, Michael. “Radio frequency noise studies for a linac-MRI system.” 2010. Web. 19 Jan 2021.

Vancouver:

Lamey M. Radio frequency noise studies for a linac-MRI system. [Internet] [Doctoral dissertation]. University of Alberta; 2010. [cited 2021 Jan 19]. Available from: https://era.library.ualberta.ca/files/n583xv11k.

Council of Science Editors:

Lamey M. Radio frequency noise studies for a linac-MRI system. [Doctoral Dissertation]. University of Alberta; 2010. Available from: https://era.library.ualberta.ca/files/n583xv11k

Anna University

10. Manivannan S. Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;.

Degree: Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis, 2015, Anna University

URL: http://shodhganga.inflibnet.ac.in/handle/10603/32174

►

The ever increasing circuit density of Integrated Circuits IC newlinewith higher clock frequency generates heat in the electronics system chip newlineThe lifetime of electronic components… (more)

Subjects/Keywords: Electromagnetic Interference Electromagnetic Compatibility; Integrated Circuits; Radio Frequency; Taguchi based grey

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APA (6^th Edition):

S, M. (2015). Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;. (Thesis). Anna University. Retrieved from http://shodhganga.inflibnet.ac.in/handle/10603/32174

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):

S, Manivannan. “Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;.” 2015. Thesis, Anna University. Accessed January 19, 2021. http://shodhganga.inflibnet.ac.in/handle/10603/32174.

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

MLA Handbook (7^th Edition):

S, Manivannan. “Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;.” 2015. Web. 19 Jan 2021.

Vancouver:

S M. Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;. [Internet] [Thesis]. Anna University; 2015. [cited 2021 Jan 19]. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/32174.

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

Council of Science Editors:

S M. Multi objective optimization of flat Plate heat sink geometry using Taguchi based grey relational Analysis;. [Thesis]. Anna University; 2015. Available from: http://shodhganga.inflibnet.ac.in/handle/10603/32174

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

11. Tigga, Celine. Modelling of Measurement Equipment for High Frequency Electromagnetic Fields.

Degree: Mathematics and Natural Sciences, 2015, University of Gävle

URL: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894

► The aim of this thesis was to develop a model of a receiver which could be quickly used to analyze radiated interference levels from… (more)

Subjects/Keywords: radio frequency interference; HVDC convertor station; equipment modelling

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APA (6^th Edition):

Tigga, C. (2015). Modelling of Measurement Equipment for High Frequency Electromagnetic Fields. (Thesis). University of Gävle. Retrieved from http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894

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):

Tigga, Celine. “Modelling of Measurement Equipment for High Frequency Electromagnetic Fields.” 2015. Thesis, University of Gävle. Accessed January 19, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894.

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

MLA Handbook (7^th Edition):

Tigga, Celine. “Modelling of Measurement Equipment for High Frequency Electromagnetic Fields.” 2015. Web. 19 Jan 2021.

Vancouver:

Tigga C. Modelling of Measurement Equipment for High Frequency Electromagnetic Fields. [Internet] [Thesis]. University of Gävle; 2015. [cited 2021 Jan 19]. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894.

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

Council of Science Editors:

Tigga C. Modelling of Measurement Equipment for High Frequency Electromagnetic Fields. [Thesis]. University of Gävle; 2015. Available from: http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894

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

The Ohio State University

12. Aksoy, Mustafa. Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry.

Degree: PhD, Electrical and Computer Engineering, 2015, The Ohio State University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=osu1448989873

► Radio Frequency Interference (RFI) is a major issue in microwave radiometry and prevents correct estimation of geophysical parameters via remote sensing. This problem is reported… (more)

▼ Radio Frequency Interference (RFI) is a major issue in microwave radiometry and prevents correct estimation of geophysical parameters via remote sensing. This problem is reported even in the protected portion of the L-band (1400-1427MHz) which is allocated for only remote sensing of Earth from space. RFI contamination in radiometric measurements and the methods to mitigate it have previously been discussed in the literature. On the other hand, a comprehensive characterization of the RFI environment and an optimal RFI detection procedure which combines multiple RFI detection algorithms to effectively operate in that environment have yet to be presented. This dissertation aims to fill this gap for L-band microwave remote sensing research efforts. First, the RFI problem in microwave radiometry and previously developed RFI detection algorithms and their applications in current microwave radiometers are reported. Then, the L-band RFI environment is characterized in terms of its temporal, spectral, spatial, and statistical properties using space-borne and air-borne measurements from European Space Agency (ESA) and National Aeronautics and Space Administration (NASA) missions as well as local air-borne campaigns. It is demonstrated that RFI is a global problem, and its temporal, spectral and statistical properties may change significantly. Thus, classical RFI detection algorithms based on certain assumptions on these properties are insufficient to resolve the RFI problem and a more sophisticated approach is needed. This dissertation introduces NASA’s Soil Moisture and Active Passive (SMAP) radiometer which was launched on January 31, 2015 as one of the first radiometers which implements such a multifaceted RFI detection technique. SMAP’s comprehensive multi-domain RFI detection approach is summarized and analyzed in terms of its performance under different RFI exposure scenarios using pre-launch and post-launch RFI studies. Finally, several improvements to the SMAP baseline algorithm, and future investigations to obtain a more efficient RFI mitigation are discussed. Advisors/Committee Members: Johnson, Joel (Advisor).

Subjects/Keywords: Electrical Engineering; Remote Sensing; Microwave radiometry; radio frequency interference

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APA (6^th Edition):

Aksoy, M. (2015). Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry. (Doctoral Dissertation). The Ohio State University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=osu1448989873

Chicago Manual of Style (16^th Edition):

Aksoy, Mustafa. “Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry.” 2015. Doctoral Dissertation, The Ohio State University. Accessed January 19, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=osu1448989873.

MLA Handbook (7^th Edition):

Aksoy, Mustafa. “Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry.” 2015. Web. 19 Jan 2021.

Vancouver:

Aksoy M. Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry. [Internet] [Doctoral dissertation]. The Ohio State University; 2015. [cited 2021 Jan 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1448989873.

Council of Science Editors:

Aksoy M. Radio Frequency Interference Characterization and Detection in L-band Microwave Radiometry. [Doctoral Dissertation]. The Ohio State University; 2015. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=osu1448989873

University of Oklahoma

13. 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 19, 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. 19 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 19]. 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

14. Ait Allal, Dalal. Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system.

Degree: Docteur es, Automatique et traitement de signal, 2012, Université d'Orléans

URL: http://www.theses.fr/2012ORLE2056

►

Les travaux présentés dans ce mémoire s’inscrivent dans le cadre de la détection d’évènements impulsionnels intermittents en provenance de pulsars. Ces objets astrophysiques sont des… (more)

▼

Les travaux présentés dans ce mémoire s’inscrivent dans le cadre de la détection d’évènements impulsionnels intermittents en provenance de pulsars. Ces objets astrophysiques sont des étoiles à neutrons hautement magnétisées en rotation rapide, qui émettent un faisceau radio balayant l’espace comme la lentille d’un phare. Ils sont détectables grâce à une instrumentation spécifique. Depuis quelques années, on a découvert de nouvelles catégories de ces pulsars, aux caractéristiques extrêmes, avec en particulier des impulsions individuelles plus intenses et irrégulières comparé à la moyenne. Il faut pouvoir les détecter en temps réel dans un environnement radio perturbé à cause des signaux de télécommunications. Cette étude propose des algorithmes de traitement d’interférences radio fréquence (RFI) adaptés à ce contexte. Plusieurs méthodes de traitement de RFI sont présentées et comparées. Parmi elles, deux ont été retenues et comparées au moyen de simulations Monte Carlo, avec un jeu de paramètres simulant le pulsar et un signal BPSK avec des puissances et des durées différentes. Pour la recherche de nouveaux pulsars, une méthode alternative est proposée (SIPSFAR), combinant capacité de recherche en temps réel et robustesse contre les RFI. Elle est basée sur la transformée de Fourier 2D et la transformée de Radon. Une étude comparative théorique a permis de confronter et comparer la sensibilité de cette nouvelle méthode avec celle communément utilisée par les radioastronomes. La méthode a été implantée sur un GPU GTX285 et testée sur un grand relevé du ciel effectué au radiotélescope de Nançay. Les résultats obtenus ont donné lieu à une comparaison statistique complémentaire à partir de données réelles.

The work presented in this thesis is in the context of the intermittent impulsive event detection at Nançay Observatory. The pulsars are highly magnetized neutron stars in rapid rotation, which emit a radio beam scanning the space like a lighthouse. They are detectable with a specific instrumentation. In recent years, new classes of such pulsars were discovered. These pulsars with extreme features, especially with individual pulses more intense and irregular compared to the average, must be detected in real time in a disrupted radio environment because of telecommunication signals. This study presents some radio frequency interference (RFI) mitigation algorithms adapted to this context. Several methods are presented and compared. Among them, two were selected and compared using Monte Carlo simulations with a set of parameters to simulate the pulsar and a BPSK signal with power and different durations. In the case of researching new pulsars, an alternative method is proposed (SIPSFAR), combining research capacity in real time and robustness against RFI. It is based on 2D Fourier transform and the Radon transform. A theoretical comparative study has confronted and compared the sensitivity of this new method and the commonly method used by radio astronomers. SIPSFAR was implemented on a GPU GTX285 and tested on a large…

Advisors/Committee Members: Theureau, Gilles (thesis director).

Subjects/Keywords: Interférences radio fréquence; Détection; Radon; GPU; Pulsar; Radio frequency interference; Detection; Radon; GPU; Pulsar; Cyclostationnarity

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APA (6^th Edition):

Ait Allal, D. (2012). Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2012ORLE2056

Chicago Manual of Style (16^th Edition):

Ait Allal, Dalal. “Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system.” 2012. Doctoral Dissertation, Université d'Orléans. Accessed January 19, 2021. http://www.theses.fr/2012ORLE2056.

MLA Handbook (7^th Edition):

Ait Allal, Dalal. “Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system.” 2012. Web. 19 Jan 2021.

Vancouver:

Ait Allal D. Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system. [Internet] [Doctoral dissertation]. Université d'Orléans; 2012. [cited 2021 Jan 19]. Available from: http://www.theses.fr/2012ORLE2056.

Council of Science Editors:

Ait Allal D. Détection d’évènements impulsionnels en environnement radioélectrique perturbé : application à l’observation des pulsars intermittents avec un système temps réel de traitement du signal : Impulsive event detection in a disturbed radio environment : application to the observation of intermittent pulsars with real-time signal processing system. [Doctoral Dissertation]. Université d'Orléans; 2012. Available from: http://www.theses.fr/2012ORLE2056

Brigham Young University

15. Nygaard, Erich Johannes. Signal Transport and RF over Fiber Design for ALPACA.

Degree: MS, 2020, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=9775&context=etd

► The design of the RF over fiber signal transport system for the ALPACA receiver is described, with particular attention to the strict noise requirements as… (more)

Subjects/Keywords: radio astronomy; RF over fiber; phased array feeds; analog; radio frequency interference; Arecibo Telescope; Engineering

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APA (6^th Edition):

Nygaard, E. J. (2020). Signal Transport and RF over Fiber Design for ALPACA. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=9775&context=etd

Chicago Manual of Style (16^th Edition):

Nygaard, Erich Johannes. “Signal Transport and RF over Fiber Design for ALPACA.” 2020. Masters Thesis, Brigham Young University. Accessed January 19, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=9775&context=etd.

MLA Handbook (7^th Edition):

Nygaard, Erich Johannes. “Signal Transport and RF over Fiber Design for ALPACA.” 2020. Web. 19 Jan 2021.

Vancouver:

Nygaard EJ. Signal Transport and RF over Fiber Design for ALPACA. [Internet] [Masters thesis]. Brigham Young University; 2020. [cited 2021 Jan 19]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=9775&context=etd.

Council of Science Editors:

Nygaard EJ. Signal Transport and RF over Fiber Design for ALPACA. [Masters Thesis]. Brigham Young University; 2020. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=9775&context=etd

NSYSU

16. Liu, Yu-Hao. Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference.

Degree: Master, Electrical Engineering, 2014, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701114-141443

► This thesis focuses on the applications of complex near-field measurement technology base on the field scan system developed by our laboratory. The presented applications include… (more)

Subjects/Keywords: radio frequency interference; receiver mode; differential signaling; complex near-field measurement; network analyzer

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APA (6^th Edition):

Liu, Y. (2014). Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701114-141443

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):

Liu, Yu-Hao. “Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference.” 2014. Thesis, NSYSU. Accessed January 19, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701114-141443.

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

MLA Handbook (7^th Edition):

Liu, Yu-Hao. “Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference.” 2014. Web. 19 Jan 2021.

Vancouver:

Liu Y. Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference. [Internet] [Thesis]. NSYSU; 2014. [cited 2021 Jan 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701114-141443.

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

Council of Science Editors:

Liu Y. Complex Near-Field Measurement Technique for Detecting Radio-Frequency Interference. [Thesis]. NSYSU; 2014. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0701114-141443

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

University of Michigan

17. Misra, Sidharth. Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing.

Degree: PhD, Atmospheric and Space Sciences, 2011, University of Michigan

URL: http://hdl.handle.net/2027.42/86308

► Radio Frequency Interference (RFI) signals are man-made sources that are increasingly plaguing passive microwave remote sensing measurements. RFI is of insidious nature, with some signals… (more)

▼ Radio Frequency Interference (RFI) signals are man-made sources that are increasingly plaguing passive microwave remote sensing measurements. RFI is of insidious nature, with some signals low power enough to go undetected but large enough to impact science measurements and their results. With the launch of the European Space Agency (ESA) Soil Moisture and Ocean Salinity (SMOS) satellite in November 2009 and the upcoming launches of the new NASA sea-surface salinity measuring Aquarius mission in June 2011 and soil-moisture measuring Soil Moisture Active Passive (SMAP) mission around 2015, active steps are being taken to detect and mitigate RFI at L-band. An RFI detection algorithm was designed for the Aquarius mission. The algorithm performance was analyzed using kurtosis based RFI ground-truth. The algorithm has been developed with several adjustable location dependant parameters to control the detection statistics (false-alarm rate and probability of detection). The kurtosis statistical detection algorithm has been compared with the Aquarius pulse detection method. The comparative study determines the feasibility of the kurtosis detector for the SMAP radiometer, as a primary RFI detection algorithm in terms of detectability and data bandwidth. The kurtosis algorithm has superior detection capabilities for low duty-cycle radar like pulses, which are more prevalent according to analysis of field campaign data. Most RFI algorithms developed have generally been optimized for performance with individual pulsed-sinusoidal RFI sources. A new RFI detection model is developed that takes into account multiple RFI sources within an antenna footprint. The performance of the kurtosis detection algorithm under such central-limit conditions is evaluated. The SMOS mission has a unique hardware system, and conventional RFI detection techniques cannot be applied. Instead, an RFI detection algorithm for SMOS is developed and applied in the angular domain. This algorithm compares brightness temperature values at various incidence angles for a particular grid location. This algorithm is compared and contrasted with other algorithms present in the visibility domain of SMOS, as well as the spatial domain. Initial results indicate that the SMOS RFI detection algorithm in the angular domain has a higher sensitivity and lower false-alarm rate than algorithms developed in the other two domains. Advisors/Committee Members: Ruf, Christopher S. (committee member), De Roo, Roger Dean (committee member), England, Anthony W. (committee member), Moghaddam, Mahta (committee member), Skou, Niels (committee member).

Subjects/Keywords: Radio Frequency Interference; Microwave Radiometry; RFI; Remote Sensing; Atmospheric, Oceanic and Space Sciences; Science

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

APA (6^th Edition):

Misra, S. (2011). Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing. (Doctoral Dissertation). University of Michigan. Retrieved from http://hdl.handle.net/2027.42/86308

Chicago Manual of Style (16^th Edition):

Misra, Sidharth. “Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing.” 2011. Doctoral Dissertation, University of Michigan. Accessed January 19, 2021. http://hdl.handle.net/2027.42/86308.

MLA Handbook (7^th Edition):

Misra, Sidharth. “Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing.” 2011. Web. 19 Jan 2021.

Vancouver:

Misra S. Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing. [Internet] [Doctoral dissertation]. University of Michigan; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/2027.42/86308.

Council of Science Editors:

Misra S. Development of Radio Frequency Interference Detection Algorithm for Passive Microwave Remote Sensing. [Doctoral Dissertation]. University of Michigan; 2011. Available from: http://hdl.handle.net/2027.42/86308

Stellenbosch University

18. Langat, Philip Kibet. Power-line sparking noise characterisation in the SKA environment.

Degree: PhD, 2011, Stellenbosch University

URL: http://hdl.handle.net/10019.1/17970

► ENGLISH ABSTRACT: The Square Kilometre Array (SKA) and its demonstrator MeerKAT are being designed to operate over a wide frequency range and are expected to… (more)

▼ ENGLISH ABSTRACT: The Square Kilometre Array (SKA) and its demonstrator MeerKAT are being designed to operate over a wide frequency range and are expected to achieve greater sensitivity and resolution than existing telescopes. The radio astronomy community is well aware of the negative impact that radio frequency interference (RFI) has on observations in the proposed frequency band. This is because weak radio signals such as those from pulsars and distant galaxies are difficult to detect on their own. The presence of RFI sources in the telescope’s operating area can severely corrupt observation data, leading to inaccurate or misleading results. Power-line interference and radiation from electric fences are examples of RFI sources. Mitigation techniques for these interference sources in the SKA system’s electromagnetic environment are essential to ensure the success of this project. These techniques can be achieved with appropriate understanding of the characteristics of the noise sources. Overhead power-line interference is known to be caused mainly by corona and gap-type (commonly known as sparking noise) discharges. Sparking noise is the dominant interference for the SKA. It is mainly encountered on wooden pole lines, which are usually distribution lines operated at up to 66 kV AC in the South African network. At this voltage level, the voltage gradients on the lines are insufficient to generate conductor corona. The power requirements for SKA precursors will be below this voltage level. The aim of the research in this dissertation is to evaluate the power line sparking characteristics through measurements and simulation of line radiation and propagation characteristics. An artificially made sparking noise generator, which is mounted on a power line, is used as noise source and the radiation characteristics are measured. Measurements were carried out in different environments, which included a high-voltage laboratory (HV-Lab), a 40m test-line, and another 22-kV test line of approximately 1.5 km. The key sparking noise parameters of interest were the temporal and spectral characteristics. The time domain features considered were the pulse shape and the repetition rate. The lateral, longitudinal and height attenuation profiles were also quantified. Since sparking noise current pulses are injected or induced onto power line conductors, the line will act as an unintentional antenna. The far-field radiation characteristics of the line were evaluated through measurements on physical scale-model structures and simulations. 1/120th and 1/200th scaled lines, using an absorbing material and metallic ground planes, respectively, were simulated in FEKO. The measurements of the constructed scale models were taken in the anechoic chamber. Both measurements and simulations showed that the line exhibits an end-fire antenna pattern mode. Line length, pulse injection point and line configuration were some of the parameters found to affect the radiation patterns. The findings from this study are used… Advisors/Committee Members: Reader, H. C., University of Stellenbosch. Faculty of Engineering. Dept of Electrical & Electronic Engineering..

Subjects/Keywords: Electronic engineering; Square Kilometre Array (SKA); Radio frequency interference (RFI); Corona (Electricity)

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APA (6^th Edition):

Langat, P. K. (2011). Power-line sparking noise characterisation in the SKA environment. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/17970

Chicago Manual of Style (16^th Edition):

Langat, Philip Kibet. “Power-line sparking noise characterisation in the SKA environment.” 2011. Doctoral Dissertation, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/17970.

MLA Handbook (7^th Edition):

Langat, Philip Kibet. “Power-line sparking noise characterisation in the SKA environment.” 2011. Web. 19 Jan 2021.

Vancouver:

Langat PK. Power-line sparking noise characterisation in the SKA environment. [Internet] [Doctoral dissertation]. Stellenbosch University; 2011. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/17970.

Council of Science Editors:

Langat PK. Power-line sparking noise characterisation in the SKA environment. [Doctoral Dissertation]. Stellenbosch University; 2011. Available from: http://hdl.handle.net/10019.1/17970

University of Colorado

19. Chong, Joshua Wei Kuang. Manifold-Based System for Passive-Active Spectrum Sharing.

Degree: MS, Electrical, Computer & Energy Engineering, 2014, University of Colorado

URL: https://scholar.colorado.edu/ecen_gradetds/1

► A feasibility study for an automated scheme for spectrum sharing between passive and active users is presented. The needs of spectrum users can be… (more)

▼ A feasibility study for an automated scheme for spectrum sharing between passive and active users is presented. The needs of spectrum users can be represented by manifolds in a Euclidean hyperspace called electrospace which has 7 dimensions: frequency (f); Cartesian coordinates (x,y,z); angular coordinates (θ,ø), and time (t). The entire globe is tessellated into geographical areas containing spectrum users, called user domains. Each user domain is recursively tessellated into smaller user domains, or subdomains. A computer cluster, or broker, in each smallest subdomain performs the calculations necessary to determine if a particular user in the subdomain experiences interference. Throughout this thesis, the Chicago Loop (area of 4.09 km², population ~ 21, 000) is taken to be the representative example of a smallest subdomain. Within each subdomain, the number of users served by a broker is reduced to a manageable number by the process of culling. There are three orders of culling. In first-order culling, subdomain pairs without line of sight and not close enough to mutually interfere are culled, or removed from further consideration for interference calculations. In second-order culling, within each subdomain an intersection test of the electrospace manifolds of all user pairs is performed. User pairs whose manifolds do not intersect are culled. In third-order culling a Friis calculation is performed for all remaining user pairs. The output of third-order culling is an RFI flag bit for each user indicating whether interference is present or not. The computational complexity of first-, second-, and third-order culling calculations was determined. Three representative user classes will be discussed: WiFi access points, Terminal Doppler Weather Radars, and passive EESS satellites. The manifold descriptor language (MDL) for each of the three user classes was described. The computational complexity of broker calculations to determine electrospace parameters from the MDL was determined. Using this complexity and the complexity of culling calculations, the total computational requirements for a broker in a representative subdomain is determined in GFLOPS (Giga Floating Point Operations Per Second). Advisors/Committee Members: Albin J. Gasiewski, Dirk Grunwald, Youjian Liu.

Subjects/Keywords: Manifolds; Radio frequency interference; Spectrum sharing; Computer Sciences; Electrical and Computer Engineering

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APA (6^th Edition):

Chong, J. W. K. (2014). Manifold-Based System for Passive-Active Spectrum Sharing. (Masters Thesis). University of Colorado. Retrieved from https://scholar.colorado.edu/ecen_gradetds/1

Chicago Manual of Style (16^th Edition):

Chong, Joshua Wei Kuang. “Manifold-Based System for Passive-Active Spectrum Sharing.” 2014. Masters Thesis, University of Colorado. Accessed January 19, 2021. https://scholar.colorado.edu/ecen_gradetds/1.

MLA Handbook (7^th Edition):

Chong, Joshua Wei Kuang. “Manifold-Based System for Passive-Active Spectrum Sharing.” 2014. Web. 19 Jan 2021.

Vancouver:

Chong JWK. Manifold-Based System for Passive-Active Spectrum Sharing. [Internet] [Masters thesis]. University of Colorado; 2014. [cited 2021 Jan 19]. Available from: https://scholar.colorado.edu/ecen_gradetds/1.

Council of Science Editors:

Chong JWK. Manifold-Based System for Passive-Active Spectrum Sharing. [Masters Thesis]. University of Colorado; 2014. Available from: https://scholar.colorado.edu/ecen_gradetds/1

20. Hellbourg, Grégory. Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes.

Degree: Docteur es, Automatique et traitement du signal, 2014, Université d'Orléans

URL: http://www.theses.fr/2014ORLE2006

►

La radio astronomie étudie les sources cosmiques au travers de leur rayonnement dans le domaine radio. Les astronomes, utilisateurs passifs du spectre électromagnétique, ont à… (more)

▼

La radio astronomie étudie les sources cosmiques au travers de leur rayonnement dans le domaine radio. Les astronomes, utilisateurs passifs du spectre électromagnétique, ont à faire face à une pollution radio de plus en plus importante. Cette thèse s’intéresse particulièrement aux interférences radio d’origine humaine (RFI), et comment les observations radio astronomiques peuvent être réalisées en bandes de fréquences non-protégées. Les approches classiques consistent à contrôler les paramètres statistiques d’une observation. Une fois détectées, les données polluées sont retirées avant post-traitement. En plus d’autres avantages techniques par rapport aux radiotélescopes paraboliques classiques, les réseaux d’antennes offrent une information spatiale lors d’une observation astronomique. La diversité spatiale entre source cosmique d’intérêt (SCOI) et RFI peut être exploitée pour développer des traitements spatiaux d’interférences. Après la formulation d’un module de données multidimensionnel, une technique de soustraction de sous espace RFI est introduite. Cette technique consiste à soustraire la contribution des RFI aux données d’une observation. La projection orthogonale a déjà été considérée auparavant. Cependant, l’orthogonalité requise entre CSOI et RFI pour retrouver une source d’intérêt non biaisée ne peut vraisemblablement pas être satisfaite. Une approche basée sur une projection oblique est introduite afin de pallier à cette condition. Les techniques de projections sont comparées aux techniques classiques de beamforming en termes de réjection de l’interférence et de récupération de la source d’intérêt. Le sous-espace RFI est inconnu de manière générale et se doit d’être estimé. Plusieurs techniques permettant cette estimation, basées sur des propriétés statistiques des RFI et sources cosmiques, sont également présentées et comparées. Les différentes techniques ont été appliquées à des données astronomiques délivrées par le radio télescope Européen LOFAR. Enfin, une implémentation d’un algorithme de traitement spatial d’interférences sur le démonstrateur EMBRACE est présenté.

Radio astronomy studies cosmic sources through their radio emissions. As passive users, astronomers have to deal with an increasingly corrupted radio spectrum. The research presented here focuses on man-made Radio Frequency Interference (RFI), and how astronomical observations can be performed in non-protected frequency bands. Traditional approaches consist in monitoring radio telescopes output data through statistical parameters. Once detected, the corrupted data is removed before further processing. Besides other technical advantages compared to single dish radio telescopes, antenna arrays provide spatial information about astronomical observations. The spatial diversity between cosmic sources-of-interest (CSOI) and RFI can be exploited to develop spatial RFI processing. After formulating a multidimensional radio astronomical data model, an interference subspace subtraction technique is introduced. This approach consists in…

Advisors/Committee Members: Harba, Rachid (thesis director), Theureau, Gilles (thesis director).

Subjects/Keywords: Radioastronomie; Réseaux d’antennes,; Suppression d’interférences; Cyclostationnarité; Radio astronomy; Antenna arrays; Radio Frequency Interference (RFI) migration; Cyclostationarity

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APA (6^th Edition):

Hellbourg, G. (2014). Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes. (Doctoral Dissertation). Université d'Orléans. Retrieved from http://www.theses.fr/2014ORLE2006

Chicago Manual of Style (16^th Edition):

Hellbourg, Grégory. “Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes.” 2014. Doctoral Dissertation, Université d'Orléans. Accessed January 19, 2021. http://www.theses.fr/2014ORLE2006.

MLA Handbook (7^th Edition):

Hellbourg, Grégory. “Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes.” 2014. Web. 19 Jan 2021.

Vancouver:

Hellbourg G. Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes. [Internet] [Doctoral dissertation]. Université d'Orléans; 2014. [cited 2021 Jan 19]. Available from: http://www.theses.fr/2014ORLE2006.

Council of Science Editors:

Hellbourg G. Traitement spatial des interférences pour les radiotélescopes de nouvelle génération : Radio Frequency Interference spatial processing for modern radio telescopes. [Doctoral Dissertation]. Université d'Orléans; 2014. Available from: http://www.theses.fr/2014ORLE2006

Brigham Young University

21. Brady, James Michael. Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy.

Degree: MS, 2016, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6643&context=etd

► In recent years, the Brigham Young University (BYU) Radio Astronomy Systems group has developed phased-array feeds and the data acquisition processing systems necessary to perform… (more)

Subjects/Keywords: radio astronomy; phased-array feeds; radio-frequency interference; real-time beamforming; digital signal processing; weak source detection; Electrical and Computer Engineering

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APA (6^th Edition):

Brady, J. M. (2016). Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6643&context=etd

Chicago Manual of Style (16^th Edition):

Brady, James Michael. “Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy.” 2016. Masters Thesis, Brigham Young University. Accessed January 19, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6643&context=etd.

MLA Handbook (7^th Edition):

Brady, James Michael. “Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy.” 2016. Web. 19 Jan 2021.

Vancouver:

Brady JM. Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy. [Internet] [Masters thesis]. Brigham Young University; 2016. [cited 2021 Jan 19]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6643&context=etd.

Council of Science Editors:

Brady JM. Real-Time Beamformer Development and Analysis of Weak Signal Detection with Interference Mitigation for Phased-Array Feed Radio Astronomy. [Masters Thesis]. Brigham Young University; 2016. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=6643&context=etd

University of Hong Kong

22. Wang, Xufang. Interference cancellation in impulse radio.

Degree: 2005, University of Hong Kong

URL: http://hdl.handle.net/10722/39998

Subjects/Keywords: Radio - Interference.; Radio frequency.; Ultra-wideband devices.

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APA (6^th Edition):

Wang, X. (2005). Interference cancellation in impulse radio. (Thesis). University of Hong Kong. Retrieved from http://hdl.handle.net/10722/39998

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):

Wang, Xufang. “Interference cancellation in impulse radio.” 2005. Thesis, University of Hong Kong. Accessed January 19, 2021. http://hdl.handle.net/10722/39998.

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

MLA Handbook (7^th Edition):

Wang, Xufang. “Interference cancellation in impulse radio.” 2005. Web. 19 Jan 2021.

Vancouver:

Wang X. Interference cancellation in impulse radio. [Internet] [Thesis]. University of Hong Kong; 2005. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10722/39998.

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

Council of Science Editors:

Wang X. Interference cancellation in impulse radio. [Thesis]. University of Hong Kong; 2005. Available from: http://hdl.handle.net/10722/39998

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

NSYSU

23. Chiang, Ya-Tang. Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation.

Degree: Master, Electro-Optical Engineering, 2013, NSYSU

URL: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1109113-143024

► With the explosive grow of modern technology, mobile devices along with high quality multi-media services have grown beyond imagination. In order to match the demand… (more)

▼ With the explosive grow of modern technology, mobile devices along with high quality multi-media services have grown beyond imagination. In order to match the demand of high speed interactive multi-media mobile applications, improving wireless network capacity is considered great challenge to modern communication technology. The key points toward multi-gigabits communications are to increase bandwidth and spectral efficiency of communication system. Higher carrier frequency provides much more bandwidth. For instance, around 60-GHz band, 7 GHz bandwidth has been declared licensed-free by several countries. However, higher carrier frequency signal suffers high transmission loss in both conventional cable and air-link transmission and leads to a limitation on transmission distance. In this thesis, Radio-over-Fiber (RoF) system is used to distribute Orthogonal Frequency Division Multiplexing (OFDM) signal from central station (CS) to base station (BS). Taking advantage of the characteristic that subcarriers of OFDM signal are orthogonal to each other, the 7 GHz bandwidth can be used more efficiently. Moreover, high frequency signal can enjoy low transmission loss with utilizing fiber as transmission medium. Multiple-Input Multiple-Output (MIMO) technology is another critical technique to improve spectral efficiency. By adding numbers of transmitter and receiver antennas and deliver independent signal through each transmitter antenna, data throughput can be increased because of the reuse of spectrum at the same time. Our group has successfully demonstrated simple RoF system using intensity-modulation direct detection scheme using electrical-absorption modulator (EAM). Although the architecture was simple, the fiber transmission distance is limited to 500 m by strong dispersion induced power fading. The single-drive mach-zehnder modulator (SD-MZM) is used to replace the EAM for being a more efficient modulator for the system. By adjusting the signal frequency and beating carrier frequency appropriately, the fiber transmission distance can be extended. However, in order to avoid signal-to-signal beat interference (SSBI), the extended distance is only 4 km. In this thesis, the frequency arrangement is selected appropriately to reduce dispersion induced power fading and the fiber transmission distance is successfully extended to 12 km. The integration with MIMO technology and the use of bit-loading algorithm further improve the spectral efficiency and achieved utmost data rate of 56 Gb/s at back-to-back transmission. Advisors/Committee Members: Hidenori Taga (chair), Yung-Jui (Ray) Chen (committee member), Chia-chien Wei (chair), Chun-Ting Lin (chair).

Subjects/Keywords: Orthogonal frequency division multiplexing; Signal-to-signal beat interference; Radio-over-fiber system; Multiple input multiple output; digital signal processing

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APA (6^th Edition):

Chiang, Y. (2013). Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation. (Thesis). NSYSU. Retrieved from http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1109113-143024

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):

Chiang, Ya-Tang. “Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation.” 2013. Thesis, NSYSU. Accessed January 19, 2021. http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1109113-143024.

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

MLA Handbook (7^th Edition):

Chiang, Ya-Tang. “Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation.” 2013. Web. 19 Jan 2021.

Vancouver:

Chiang Y. Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation. [Internet] [Thesis]. NSYSU; 2013. [cited 2021 Jan 19]. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1109113-143024.

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

Council of Science Editors:

Chiang Y. Simple 2x2 MIMO 60-GHz OFDM RoF System with Single-Electrode MZMs Employing Beating Interference Mitigation. [Thesis]. NSYSU; 2013. Available from: http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-1109113-143024

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

Stellenbosch University

24. Pienaar, Hardie. Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies.

Degree: PhD, Electrical and Electronic Engineering, 2015, Stellenbosch University

URL: http://hdl.handle.net/10019.1/97811

►

ENGLISH ABSTRACT: The Northern Cape in South Africa has been chosen to host the Square Kilometre Array (SKA) due to the area’s overall radio quietness.… (more)

▼

ENGLISH ABSTRACT: The Northern Cape in South Africa has been chosen to host the Square Kilometre Array (SKA) due to the area’s overall radio quietness. As part of the supporting systems for the Karoo Array Telescope (KAT), a processing building has been constructed on the site. With the Karoo Array Processing Building (KAPB) now in place, investigating the radio frequency interference (RFI) of the building has become a high priority. If successful, understanding of RFI propagation on-site will shape policies and contribute to the sustainability of on-site radio quietness. This dissertation focuses on understanding the shielding and propagation characteristics of both the KAPB building, as well as a man-made soil berm. On-site measurements, scale models and computational models will be used to investigate the local electromagnetic environment. Additionally, a Multi-copter vehicle is developed to support on-site measurement campaigns. Using data measured on-site it was possible to develop empirical models for local shielding estimations. It was found that the shielding performance of the berm was primarily affected by diffraction. Also, the developed computational model makes it possible to investigate alternative terrestrial structures. The work done in this dissertation will permit off-site analysis of propagation over terrestrial structures. Moreover, the development of a Multi-copter measurement platform creates more efficient metrology. Finally, empirical models are designed so that shielding budgets can be calculated for noise sources to the nearest receivers.

AFRIKAANSE OPSOMMING: Die Noord Kaap in Suid Afrika is gekies om ‘n gedeelte van die Square Kilometre Array (SKA) te huisves. Die besluit is gedeeltelik gemaak as gevolg van die skoon radio omgewing in die Noord Kaap. ‘n Ondergrondse gebou, genaamd die Karoo Array Processing Building (KAPB), is gebou as deel van die ondersteunende infrastrukture van die Karoo Array Telescope (KAT). Met die oprigting van die Karoo Array Processing Building (KAPB), het dit belangrik geraak om radio frekwensie steuring (RFI) te ondersoek. Indien die studie suksesvol is, sal die begrip van RFI voortplanting in die omgewing help om beleid te vorm ten opsigte van die volhoubaarheid van die skoon RFI omgewing. Hierdie proefskrif fokus op die verstaan van beskermings verm¨oe van beide die KAPB gebou en die mensgemaakte keerwal asook plaaslike radio frekwensie voortplantings karakteristieke. Metings geneem in hierdie area, skaalmodelle sowel as numeriese elektromagnetiese modellering (CEM) is gebruik om die plaaslike elektromagnetiese omgewing te ondersoek. Verder is ’n Multi-kopter platvorm ontwikkel vir die ondersteuning van metings veldtogte. Deur gebruik te maak van gemete data wat geneem is in die area, kon empiriese modelle ontwikkel word wat gebruik is om die plaaslike RFI beskerming te beraam. Daar is gevind dat die beskerming van die heuwel hoofsaaklik geaffekteer word deur die diffraksie daaroor. ’n CEM model is ook ontwikkel om die…

Advisors/Committee Members: Reader, H. C., Davidson, D. B., Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering.

Subjects/Keywords: Karoo Array Processing Building (KAPB) – Shielding and propagation characteristics; Karoo Array Telescope (KAT); Radio frequency interference (RFI); UCTD

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APA (6^th Edition):

Pienaar, H. (2015). Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies. (Doctoral Dissertation). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/97811

Chicago Manual of Style (16^th Edition):

Pienaar, Hardie. “Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies.” 2015. Doctoral Dissertation, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/97811.

MLA Handbook (7^th Edition):

Pienaar, Hardie. “Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies.” 2015. Web. 19 Jan 2021.

Vancouver:

Pienaar H. Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies. [Internet] [Doctoral dissertation]. Stellenbosch University; 2015. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/97811.

Council of Science Editors:

Pienaar H. Karoo Array Telescope site shielding : laboratory, computational and multi-copter studies. [Doctoral Dissertation]. Stellenbosch University; 2015. Available from: http://hdl.handle.net/10019.1/97811

California State University – Northridge

25. Pien, Chiang S. Reduction of RFI by selective zero switching of SCR dimmers.

Degree: MS, Department of Engineering, 1975, California State University – Northridge

URL: http://hdl.handle.net/10211.2/5175

► The objective of this project is to investigate the possibility of reducing Radio Frequency Interference (RFI) by selective zero switching control instead of phase control… (more)

Subjects/Keywords: Radio frequency interference; Dissertations, Academic – CSUN – Engineering

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APA (6^th Edition):

Pien, C. S. (1975). Reduction of RFI by selective zero switching of SCR dimmers. (Masters Thesis). California State University – Northridge. Retrieved from http://hdl.handle.net/10211.2/5175

Chicago Manual of Style (16^th Edition):

Pien, Chiang S. “Reduction of RFI by selective zero switching of SCR dimmers.” 1975. Masters Thesis, California State University – Northridge. Accessed January 19, 2021. http://hdl.handle.net/10211.2/5175.

MLA Handbook (7^th Edition):

Pien, Chiang S. “Reduction of RFI by selective zero switching of SCR dimmers.” 1975. Web. 19 Jan 2021.

Vancouver:

Pien CS. Reduction of RFI by selective zero switching of SCR dimmers. [Internet] [Masters thesis]. California State University – Northridge; 1975. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10211.2/5175.

Council of Science Editors:

Pien CS. Reduction of RFI by selective zero switching of SCR dimmers. [Masters Thesis]. California State University – Northridge; 1975. Available from: http://hdl.handle.net/10211.2/5175

Texas State University – San Marcos

26. Keni, Archita Satish. Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems.

Degree: MS, Engineering, 2019, Texas State University – San Marcos

URL: https://digital.library.txstate.edu/handle/10877/8985

► The Radio Frequency Identification [RFID] technology is a novel solution used in supply chain management. A large warehouse consisting of hundreds of objects must be… (more)

▼ The Radio Frequency Identification [RFID] technology is a novel solution used in supply chain management. A large warehouse consisting of hundreds of objects must be handled effectively and automatically. RFID technology automatically identifies various objects faster, which improves effectiveness in order to create successful stock management systems. Most of today’s RFID applications involved in large retailing businesses demonstrate successful results in their businesses. With the requirement of identifying hundreds of objects in a very short amount of time, RFID technology also faces a significant issue known as tag collisions, which raises concerns about high speed, accuracy, and high energy efficiency requirements. We propose a new CDMA/AIC protocol to improve the performance (speed, throughput, accuracy, and especially energy efficiency) of mobile and handheld RFID tag systems by giving them the ability to overcome the problems associated with signal corruption due to collisions and the multipath environment, and providing a way to cancel the effects of interference from the desired signal. The ability to accurately capture the information from tags with greater throughput and fewer errors will be demonstrated to present a novel solution in this area. We have developed a CDMA with AIC algorithm which provides a solution yielding energy efficiency in low SNR environments with multipath and shadowing. The CDMA/AIC does not have the inefficiencies of Slotted-Aloha, can handle low SNR environments, and does not have the restriction of conventional CDMA that the backscattered signal from each tag must arrive at the receiver with the same amplitude. The CDMA/AIC protocol ensures accurately read tags even with collisions, successfully removes the negative impacts caused due to noise, near-far, shadowing and multipath and gives the best energy efficiency for the overall system. Advisors/Committee Members: Stern, Harold (advisor), Stapleton, William (committee member), Aslan, Semih (committee member).

Subjects/Keywords: RFID tag systems; Code division multiple access (cdma); Inventory management; Adaptive interference cancellation; Radio frequency identification systems; Business logistics

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APA (6^th Edition):

Keni, A. S. (2019). Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems. (Masters Thesis). Texas State University – San Marcos. Retrieved from https://digital.library.txstate.edu/handle/10877/8985

Chicago Manual of Style (16^th Edition):

Keni, Archita Satish. “Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems.” 2019. Masters Thesis, Texas State University – San Marcos. Accessed January 19, 2021. https://digital.library.txstate.edu/handle/10877/8985.

MLA Handbook (7^th Edition):

Keni, Archita Satish. “Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems.” 2019. Web. 19 Jan 2021.

Vancouver:

Keni AS. Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems. [Internet] [Masters thesis]. Texas State University – San Marcos; 2019. [cited 2021 Jan 19]. Available from: https://digital.library.txstate.edu/handle/10877/8985.

Council of Science Editors:

Keni AS. Using CDMA/AIC to Increase Energy Efficiency and Reduce Multipath Effects in Passive RFID Tag Systems. [Masters Thesis]. Texas State University – San Marcos; 2019. Available from: https://digital.library.txstate.edu/handle/10877/8985

Ohio University

27. Uijt de Haag, Maarten. An investigation into the application of block processing techniques for the Global Positioning System.

Degree: PhD, Electrical Engineering & Computer Science (Engineering and Technology), 1999, Ohio University

URL: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181171187

► Digital signal processing techniques, applied to blocks of GPS samples are investigated and tested using GPS software signal simulators and real GPS data. This… (more)

Subjects/Keywords: user-satellite dynamics; oscillator variations; radio- frequency interference

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APA (6^th Edition):

Uijt de Haag, M. (1999). An investigation into the application of block processing techniques for the Global Positioning System. (Doctoral Dissertation). Ohio University. Retrieved from http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181171187

Chicago Manual of Style (16^th Edition):

Uijt de Haag, Maarten. “An investigation into the application of block processing techniques for the Global Positioning System.” 1999. Doctoral Dissertation, Ohio University. Accessed January 19, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181171187.

MLA Handbook (7^th Edition):

Uijt de Haag, Maarten. “An investigation into the application of block processing techniques for the Global Positioning System.” 1999. Web. 19 Jan 2021.

Vancouver:

Uijt de Haag M. An investigation into the application of block processing techniques for the Global Positioning System. [Internet] [Doctoral dissertation]. Ohio University; 1999. [cited 2021 Jan 19]. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181171187.

Council of Science Editors:

Uijt de Haag M. An investigation into the application of block processing techniques for the Global Positioning System. [Doctoral Dissertation]. Ohio University; 1999. Available from: http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1181171187

Georgia Tech

28. Petrin, Allen John. Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio.

Degree: PhD, Electrical and Computer Engineering, 2005, Georgia Tech

URL: http://hdl.handle.net/1853/11648

► Radio spectrum is a vital national asset; proper management of this finite resource is essential to the operation and development of telecommunications, radio-navigation, radio astronomy,… (more)

Subjects/Keywords: Spectrum management; Radio spectrum; Cognitive radio; Software defined radio; Usage detection; Radio frequency allocation; Radio Interference; Broadband communication systems; Radio broadcasting

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

APA (6^th Edition):

Petrin, A. J. (2005). Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/11648

Chicago Manual of Style (16^th Edition):

Petrin, Allen John. “Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio.” 2005. Doctoral Dissertation, Georgia Tech. Accessed January 19, 2021. http://hdl.handle.net/1853/11648.

MLA Handbook (7^th Edition):

Petrin, Allen John. “Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio.” 2005. Web. 19 Jan 2021.

Vancouver:

Petrin AJ. Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio. [Internet] [Doctoral dissertation]. Georgia Tech; 2005. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/1853/11648.

Council of Science Editors:

Petrin AJ. Maximizing the Utility of Radio Spectrum: Broadband Spectrum Measurements and Occupancy Model for Use by Cognitive Radio. [Doctoral Dissertation]. Georgia Tech; 2005. Available from: http://hdl.handle.net/1853/11648

29. De Beer, Mourits. Wideband Direction Finding of RFI for MeerKAT.

Degree: MEng, Electrical and Electronic Engineering, 2017, Stellenbosch University

URL: http://hdl.handle.net/10019.1/101179

►

ENGLISH ABSTRACT: The Karoo desert in the Northern Cape of South Africa is currently host to the MeerKAT radio telescope { a precursor facility for… (more)

▼

ENGLISH ABSTRACT: The Karoo desert in the Northern Cape of South Africa is currently host to the MeerKAT radio telescope { a precursor facility for the Square Kilometre Array (SKA) project. The area was selected due to its natural quietness from man-made sources of radio-frequency interference (RFI), as the telescope site needs to uphold demanding electromagnetic compatibility (EMC) standards in order to perform sensitive radio astronomy observations. It is therefore necessary that the facility monitors the spectrum across MeerKAT's operational bandwidth to identify the presence of noise sources that may compromise the integrity of future measurements. This thesis presents the design and simulation of a direction finding (DF) solution that will prove to be an essential means of locating and mitigating on-site or outside sources of interference. The asymptotic conical dipole (ACD) antenna is implemented with a 3D-printed plastic design, coated in metal to achieve an impedance bandwidth greater than 100:1. Four units of these designs are manufactured for use in a multi-receiver system, which applies a phase correlation DF algorithm to estimate the bearing of an impulse source. The accuracy of arbitrary antenna configurations is investigated by simulation to evaluate the performance under noisy conditions. Field measurements are conducted that verify the simulated angular resolution of the system, which obtains source angle estimates within ±2:5° accuracy.

AFRIKAANSE OPSOMMING: Die Karoo woestein-gebied in die Noord Kaap provinsie van Suid Afrika is tans die tuiste van die MeerKAT radio teleskoop wat as voorloper tot die SKA-projek dien. Die area is gekies weens die natuurlike afwesigheid van mensgemaakte radiogolfsteurings. Die terrein moet voldoen aan baie ho e vereistes ten op sigte van elektromagnetiese- aanpasbaarheidstandaarde, ten einde die doelstelling van hoogs sensitiewe sterrekundige waarnemings te kan bemagtig. Dit is dus noodsaaklik vir die fasiliteit om die operasionele frekwensie-spektrum te monitor, om die teenwoordigheid van seinsteurings, wat die waarnemings kan beinvloed, te identifiseer. Hierdie tesis bied die ontwerp van `n rigtingsvinding stelsel, wat van kardinale belang sal wees in die aanduiding en versagting van steuringsbronne. `n Asimtotieskoniese dipool-antenna, wat met 3-D drukkers uit plastiek geskep is en dan met metaal oorgetrek is, word gebruik om `n bandwydte-impedansie van meer as 100:1 te behaal. Vier eenhede, volgens die ontwerp, is vervaardig vir die gebruik in `n multi-ontvangerstelsel, waar die toepassing van 'n fase-korrelasie rigtingsvindingalgoritme, die oorsprong van steurings bereken. Die akkuraatheid van arbitr^ere antenna konfigurasies is ondersoek en evalueer deur die gebruik van gesimuleerde waarnemings onder steuringsomstandighede. Waarnemings tydens praktiese toetse bevestig die hoek resolusie van die stelselkonfigurasie met `n akuraatheid binne ±2:5° ten opsigte van die ware invalshoek.

Advisors/Committee Members: Wiid, Gideon, Davidson, David, Stellenbosch University. Faculty of Engineering. Dept. of Electrical and Electronic Engineering..

Subjects/Keywords: UCTD; Radio telescopes; Broadband communication systems; Radio frequency interference

…Radio-Frequency RFI Radio-Frequency Interference RMSE Root-Mean-Square Error SHF Super… …levels of radio-frequency interference (RFI), which must be as low as possible for… …by ITU Frequency bands and interference Antenna engineers have, over the years, subdivided… …the radio spectrum into frequency bands that are allocated for specific applications or… …For instance, FM radio wouldn’t work if every station shared the same broadcasting frequency…

11 more images…

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

APA (6^th Edition):

De Beer, M. (2017). Wideband Direction Finding of RFI for MeerKAT. (Thesis). Stellenbosch University. Retrieved from http://hdl.handle.net/10019.1/101179

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):

De Beer, Mourits. “Wideband Direction Finding of RFI for MeerKAT.” 2017. Thesis, Stellenbosch University. Accessed January 19, 2021. http://hdl.handle.net/10019.1/101179.

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

MLA Handbook (7^th Edition):

De Beer, Mourits. “Wideband Direction Finding of RFI for MeerKAT.” 2017. Web. 19 Jan 2021.

Vancouver:

De Beer M. Wideband Direction Finding of RFI for MeerKAT. [Internet] [Thesis]. Stellenbosch University; 2017. [cited 2021 Jan 19]. Available from: http://hdl.handle.net/10019.1/101179.

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

Council of Science Editors:

De Beer M. Wideband Direction Finding of RFI for MeerKAT. [Thesis]. Stellenbosch University; 2017. Available from: http://hdl.handle.net/10019.1/101179

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

Brigham Young University

30. Black, Richard Allen. Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds.

Degree: MS, 2014, Brigham Young University

URL: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5241&context=etd

► The Brigham Young University (BYU) Radio Astronomy group, in collaboration with Cornell University, the University of Massachusetts, and the National Radio Astronomy Observatory (NRAO),… (more)

Subjects/Keywords: radio astronomy; phased-array feeds; radio-frequency interference; synthesis imaging arrays; interferometry; digital signal processing; australian square kilometre array pathfinder; Electrical and Computer Engineering

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

APA (6^th Edition):

Black, R. A. (2014). Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds. (Masters Thesis). Brigham Young University. Retrieved from https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5241&context=etd

Chicago Manual of Style (16^th Edition):

Black, Richard Allen. “Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds.” 2014. Masters Thesis, Brigham Young University. Accessed January 19, 2021. https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5241&context=etd.

MLA Handbook (7^th Edition):

Black, Richard Allen. “Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds.” 2014. Web. 19 Jan 2021.

Vancouver:

Black RA. Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds. [Internet] [Masters thesis]. Brigham Young University; 2014. [cited 2021 Jan 19]. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5241&context=etd.

Council of Science Editors:

Black RA. Digital Back End Development and Interference Mitigation Methods for Radio Telescopes with Phased-Array Feeds. [Masters Thesis]. Brigham Young University; 2014. Available from: https://scholarsarchive.byu.edu/cgi/viewcontent.cgi?article=5241&context=etd

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Open Access Theses and Dissertations