Performance of a Novel Maximum-Ratio Precoder in Massive MIMO with Multiple-Antenna Users

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Abstract

In this paper, we analyze and compare the performance of conventional maximum-ratio (MR) precoding to a proposed alternative scheme, when applied
to a massive multiple-input multiple-output (MIMO) system with multiple-antenna users. In the proposed MR precoding scheme, each channel vector is divided by its norm square to increase the degree of hardening of the effective channel gains at the users. We derive closed-form expressions for the achievable spectral efficiency (SE) of both the conventional and proposed precoding schemes. These closed-form expressions are very simple and useful for further system design. For instance, for both precoding schemes, our results justify the motivation for additional user antennas since significant performance improvements are observed. The proposed scheme produces greater performance when compared to the conventional one across a range of system set-ups. More specifically, the proposed scheme is most effective in systems where the numbers of users and user antennas are kept small.
Original languageEnglish
Title of host publicationIEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC)
Publisher IEEE
Number of pages6
ISBN (Electronic)978-1-5386-8110-7
Publication statusPublished - 21 Nov 2019

Publication series

NameIEEE 30th Annual International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC): Proceedings
PublisherIEEE
ISSN (Print)2166-9570
ISSN (Electronic)2166-9589

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