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Performance analysis of linear precoders with imperfect channel covariance information for multicell system

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Názov: Performance analysis of linear precoders with imperfect channel covariance information for multicell system
Autori: Emmanuel Mukubwa, Oludare A. Sokoya
Zdroj: The Journal of Engineering (2020)
Informácie o vydavateľovi: Wiley, 2020.
Rok vydania: 2020
Zbierka: LCC:Engineering (General). Civil engineering (General)
Predmety: polynomials, interference suppression, antenna arrays, radiofrequency interference, wireless channels, mimo communication, precoding, channel estimation, instantaneous signal-to-interference, multicell massive mimo system, spectral efficiency, -noise ratio, achievable signal-to-interference, multicell scenario, massive multiple-input multiple-output wireless system, truncated polynomial expansion-based precoder, rapid numerical algorithms-based precoder, regularised zero forcing precoder, multicell system, imperfect channel covariance information, linear precoders, performance analysis, Engineering (General). Civil engineering (General), TA1-2040
Popis: Comparison and analysis of the regularised zero forcing precoder, rapid numerical algorithms-based precoder and the truncated polynomial expansion-based precoder are done for massive multiple-input multiple-output wireless system for multicell scenario. The analysis was done for the imperfect channel covariance information. The achievable signal-to-interference-and-noise ratio, spectral efficiency and energy efficiency were investigated. The simulated outcome of the rapid numerical algorithms, regularised zero forcing and truncated polynomial expansion precoders for multicell massive MIMO system was analysed. The rapid numerical algorithms-based precoder gave the best performance followed by the regularised zero forcing precoder, and the truncated polynomial expansion-based precoder had the lowest performance for the multicell massive MIMO system. The increase in spectral efficiency per cell can be attributed to the fact that the pre-log factor reduces with the increased number of pilots. Also, this leads to increased instantaneous signal-to-interference-and-noise ratio as the channel estimates become better with reduced pilot contamination. Again, for truncated polynomial expansion precoding there is a reduction in spectral efficiency because improvement in approximation quality do not overshadow the reduction in pre-log factor. The performance is evaluated for uncoordinated and coordinated massive MIMO.
Druh dokumentu: article
Popis súboru: electronic resource
Jazyk: English
ISSN: 2051-3305
Relation: https://digital-library.theiet.org/content/journals/10.1049/joe.2019.1122; https://doaj.org/toc/2051-3305
DOI: 10.1049/joe.2019.1122
Prístupová URL adresa: https://doaj.org/article/549b51f0e8f646d29aa0048fe8e6d25e
Prístupové číslo: edsdoj.549b51f0e8f646d29aa0048fe8e6d25e
Databáza: Directory of Open Access Journals
Popis
Abstrakt:Comparison and analysis of the regularised zero forcing precoder, rapid numerical algorithms-based precoder and the truncated polynomial expansion-based precoder are done for massive multiple-input multiple-output wireless system for multicell scenario. The analysis was done for the imperfect channel covariance information. The achievable signal-to-interference-and-noise ratio, spectral efficiency and energy efficiency were investigated. The simulated outcome of the rapid numerical algorithms, regularised zero forcing and truncated polynomial expansion precoders for multicell massive MIMO system was analysed. The rapid numerical algorithms-based precoder gave the best performance followed by the regularised zero forcing precoder, and the truncated polynomial expansion-based precoder had the lowest performance for the multicell massive MIMO system. The increase in spectral efficiency per cell can be attributed to the fact that the pre-log factor reduces with the increased number of pilots. Also, this leads to increased instantaneous signal-to-interference-and-noise ratio as the channel estimates become better with reduced pilot contamination. Again, for truncated polynomial expansion precoding there is a reduction in spectral efficiency because improvement in approximation quality do not overshadow the reduction in pre-log factor. The performance is evaluated for uncoordinated and coordinated massive MIMO.
ISSN:20513305
DOI:10.1049/joe.2019.1122