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You searched for subject:(Generalised reassignment). Showing records 1 – 2 of 2 total matches.

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University of KwaZulu-Natal

1. Naidoo, Nigel Reece. Enhanced performance and efficiency schemes for generalised spatial modulation.

Degree: 2017, University of KwaZulu-Natal

Generalised spatial modulation (GSM) is a relatively new multiple-input multiple-output (MIMO) technique, which conveys information via a spatial constellation, comprising groupings of active transmit antenna, and a conventional M-ary quadrature amplitude modulation (MQAM) or M-ary phase shift keying (MPSK) signal constellation. The first objective of this thesis is to propose a GSM scheme with improved bit error rate (BER) performance, termed generalised spatial modulation with constellation reassignment (GSM-CR). A framework for the design of GSM-CR systems is presented. An analytical bound for the average BER of GSM-CR over independent and identically distributed (i.i.d.) Rayleigh flat fading channels is also derived and the accuracy of this bound is verified by Monte Carlo simulation results. Moreover, Monte Carlo simulation results demonstrate that for 9 bits/s/Hz transmission, GSM-CR achieves gains of 5 dB and 4 dB, at a BER of 10-5, when compared to GSM and spatial modulation (SM), respectively. The maximum likelihood (ML) GSM-CR detector offers optimal BER performance at the expense of high computational complexity, particularly when high order digital modulation techniques are employed. The second objective of this thesis is to propose a new GSM-CR detector, termed zero-forcing maximum likelihood (ZF-ML). The proposed ZF-ML detector is characterised by low computational complexity, complexity that is independent of the order of digital modulation technique utilised and BER performance similar to that obtained by the ML detector. Performance and complexity comparisons between the ZF-ML GSM-CR detector and popular GSM and GSM-CR detection schemes reveal that for the 𝑁𝑡×4 64QAM configuration, where 𝑁𝑡 refers to the number of transmit antennas and 4 is the number of receive antennas: i) the ZF-ML GSM-CR detector reduces computational complexity at the receiver by up to 60% and exhibits similar BER performance when compared to the ML GSM-CR detection scheme; ii) ZF-ML configured with two candidate symbols per initial symbol estimate reduces the receiver complexity by up to 60% whilst ZF-ML configured with eight candidate symbols per initial symbol estimate achieves gains of up to 5 dB, at a BER of 10-5, when compared to the ML GSM detector; iii) for systems that encode more than one information bit in the spatial domain, certain ZF-ML configurations operate at a higher computational complexity of up to 235% when compared to the SV GSM detector. However, the higher computational complexity imposed by the ZF-ML GSM-CR detector is traded-off by significant gains of up to 5 dB, at a BER of 10-5, when compared to the SV GSM detection scheme. The GSM-CR scheme only permits two active transmit antennas during a particular timeslot. This limits the number of bits that can be encoded in the spatial domain and therefore the overall spectral efficiency attainable. The third objective of this thesis is to propose a generalised spatial modulation with dual constellation reassignment (GSM-DCR) technique, which is geared… Advisors/Committee Members: Xu, Hongjun. (advisor).

Subjects/Keywords: Generalised spatial modulation.; Multiple-input multiple-output (MIMO) technique.; M-ary quadrature amplitude modulation (MQAM).; Generalised spatial modulation with constellation reassignment (GSM-CR).; Computational complexity.

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

APA (6th Edition):

Naidoo, N. R. (2017). Enhanced performance and efficiency schemes for generalised spatial modulation. (Thesis). University of KwaZulu-Natal. Retrieved from https://researchspace.ukzn.ac.za/handle/10413/17404

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

Chicago Manual of Style (16th Edition):

Naidoo, Nigel Reece. “Enhanced performance and efficiency schemes for generalised spatial modulation.” 2017. Thesis, University of KwaZulu-Natal. Accessed December 01, 2020. https://researchspace.ukzn.ac.za/handle/10413/17404.

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

MLA Handbook (7th Edition):

Naidoo, Nigel Reece. “Enhanced performance and efficiency schemes for generalised spatial modulation.” 2017. Web. 01 Dec 2020.

Vancouver:

Naidoo NR. Enhanced performance and efficiency schemes for generalised spatial modulation. [Internet] [Thesis]. University of KwaZulu-Natal; 2017. [cited 2020 Dec 01]. Available from: https://researchspace.ukzn.ac.za/handle/10413/17404.

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

Council of Science Editors:

Naidoo NR. Enhanced performance and efficiency schemes for generalised spatial modulation. [Thesis]. University of KwaZulu-Natal; 2017. Available from: https://researchspace.ukzn.ac.za/handle/10413/17404

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

2. Muševič, Sašo. Non-stationary sinusoidal analysis.

Degree: Departament de Tecnologies de la Informació i les Comunicacions, 2013, Universitat Pompeu Fabra

Many types of everyday signals fall into the non-stationary sinusoids category. A large family of such signals represent audio, including acoustic/electronic, pitched/transient instrument sounds, human speech/singing voice, and a mixture of all: music. Analysis of such signals has been in the focus of the research community for decades. The main reason for such intense focus is the wide applicability of the research achievements to medical, financial and optical applications, as well as radar/sonar signal processing and system analysis. Accurate estimation of sinusoidal parameters is one of the most common digital signal processing tasks and thus represents an indispensable building block of a wide variety of applications. Classic time-frequency transformations are appropriate only for signals with slowly varying amplitude and frequency content - an assumption often violated in practice. In such cases, reduced readability and the presence of artefacts represent a significant problem. Time and frequency resolu Advisors/Committee Members: [email protected] (authoremail), true (authoremailshow), Serra, Xavier (director), Bonada, Jordi, 1973- (director), true (authorsendemail).

Subjects/Keywords: Sinusoidal analysis; Non-stationary sinusoid; Amplitude modulation; Frequency modulation; Polynomial phase; Generalised sinusoid; Complex polynomial amplitude modulated complex sinusoid with exponential damping; cPACE, cPACED, PACE; Overapping sinusoids; Non-linear analysis; Kernel based analysis; Linear systems of equations; Non-linear systems of equations; Multivariate polynomial systems; Energy reallocation; Reassignment; Generalised reassignment; Distribution derivative; Derivative method; Sinusoidal parameter estimation; Sound analysis; High-resolution analysis; Transient analysis; Time-frequency distributions; Chebyshev polynomial; Adaptive signal analysis; Gamma function; 62

Reassignment and derivative method . . . . . . . . . . . . . 3.2 Generalised reassignment… …generalised reassignment and generalised derivative method… …with exponential damping (cPACED) and the generalised sinusoid - a complex sinusoid… …13 13 16 20 23 xvi contents 3 Generalised sinusoid analysis using derivatives 3.1… …parameters: amplitude and phase . . . . . 3.5 Unified reassignment, derivative and distribution… 

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

APA (6th Edition):

Muševič, S. (2013). Non-stationary sinusoidal analysis. (Thesis). Universitat Pompeu Fabra. Retrieved from http://hdl.handle.net/10803/123809

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

Chicago Manual of Style (16th Edition):

Muševič, Sašo. “Non-stationary sinusoidal analysis.” 2013. Thesis, Universitat Pompeu Fabra. Accessed December 01, 2020. http://hdl.handle.net/10803/123809.

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

MLA Handbook (7th Edition):

Muševič, Sašo. “Non-stationary sinusoidal analysis.” 2013. Web. 01 Dec 2020.

Vancouver:

Muševič S. Non-stationary sinusoidal analysis. [Internet] [Thesis]. Universitat Pompeu Fabra; 2013. [cited 2020 Dec 01]. Available from: http://hdl.handle.net/10803/123809.

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

Council of Science Editors:

Muševič S. Non-stationary sinusoidal analysis. [Thesis]. Universitat Pompeu Fabra; 2013. Available from: http://hdl.handle.net/10803/123809

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

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