Channel estimation and linear precoding in multiuser multiple-antenna TDD systems

Jubin Jose*, Alexei Ashikhmin, Phil Whiting, Sriram Vishwanath

*Corresponding author for this work

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

Traditional approaches in the analysis of downlink systems decouple the precoding and the channel estimation problems. However, in cellular systems with mobile users, these two problems are, in fact, tightly coupled. In this paper, this coupling is explicitly studied by accounting for the channel training overhead and estimation error while determining the overall system throughput. This paper studies the problem of utilizing imperfect channel estimates for efficient linear precoding and user selection. It presents precoding methods that take into account the degree of channel estimation error. Information-theoretic lower and upper bounds are derived to evaluate the performance of these precoding methods. In typical scenarios, these bounds are close.

Original languageEnglish
Article number5755212
Pages (from-to)2102-2116
Number of pages15
JournalIEEE Transactions on Vehicular Technology
Volume60
Issue number5
DOIs
Publication statusPublished - Jun 2011
Externally publishedYes

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