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http://dx.doi.org/10.7840/KICS.2011.36A.3.223

Statistical Precoder Design for Spatial Multiplexing Systems in Correlated MIMO Fading Channels  

Moon, Sung-Hyun (고려대학교 전기전자전파공학부 무선통신 연구실)
Kim, Jin-Sung (고려대학교 전기전자전파공학부 무선통신 연구실)
Lee, In-Kyu (고려대학교 전기전자전파공학부 무선통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.36, no.3A, 2011 , pp. 223-231 More about this Journal
Abstract
It has been shown that the performance of multiple-input multiple-output (MIMO) spatial multiplexing systems is significantly degraded when spatial correlation exists between transmit and receive antenna pairs. In this paper, we investigate designs of a new statistical precoder for spatial multiplexing systems with maximum likelihood (ML) receiver which requires only correlation statistics at the transmitter. Two kinds of closed-form solution precoders based on rotation and power allocation are proposed by means of maximizing the minimum E tlidean distance of joint symbol constellations. In addition, we extend our results to linear receivers for correlated channels. We provide a method which yields the same profits from the proposed precoders based on a simple zero-forcing (ZF) receiver. The simulation shows that 2dB and 8dB gains are achieved for ML and ZF systems with two transmit antennas, respectively, compared to the conventional systems.
Keywords
multiple-input multiple-output (MIMO); spatial multiplexing; antenna correlation; maximumlikelihood detection (MLD); statistical precoding;
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