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The Journal of Engineering
Article . 2020 . Peer-reviewed
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The Journal of Engineering
Article
License: CC BY
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Performance analysis of linear precoders with imperfect channel covariance information for multicell system

Authors: Emmanuel Mukubwa; Oludare A. Sokoya;

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

Abstract

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.

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Keywords

instantaneous signal-to-interference, polynomials, -noise ratio, achievable signal-to-interference, multicell scenario, truncated polynomial expansion-based precoder, wireless channels, multicell massive mimo system, regularised zero forcing precoder, performance analysis, massive multiple-input multiple-output wireless system, precoding, interference suppression, channel estimation, linear precoders, radiofrequency interference, Engineering (General). Civil engineering (General), spectral efficiency, multicell system, imperfect channel covariance information, antenna arrays, mimo communication, TA1-2040, rapid numerical algorithms-based precoder

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
1
Average
Average
Average
gold