Multi-cell MMSE Combining over Correlated Rician Channels in Massive MIMO Systems

Ikram Boukhedimi, Abla Kammoun, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

This work investigates the uplink of massive MIMO systems using multi-cell MMSE (M-MMSE) combining that was shown to yield unbounded capacity in Rayleigh fading. All intra and inter-cell channels are correlated with distinct per-user Rician factors and channel correlation matrices, pilot contamination and imperfect channel estimation. First, a closed-form approximation of the spectral efficiency (SE) is derived thus enabling to demonstrate that, under certain conditions on the correlation matrices, M-MMSE generates unbounded SE in Rician fading. Second, the impact of inter-cell LoS components is examined in favorable propagation conditions, and, interestingly, shown to be more beneficial in terms of SE than when these interfering links are entirely scattered.
Original languageEnglish (US)
Pages (from-to)12-16
Number of pages5
JournalIEEE Wireless Communications Letters
Volume9
Issue number1
DOIs
StatePublished - Sep 4 2019

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