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Statistical Precoder Design for Spatial Multiplexing Systems in Correlated MIMO Fading Channels
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 Title & Authors
Statistical Precoder Design for Spatial Multiplexing Systems in Correlated MIMO Fading Channels
Moon, Sung-Hyun; Kim, Jin-Sung; Lee, In-Kyu;
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 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;
 Language
English
 Cited by
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