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Semi-Blind Channel Covariance Estimation for MIMO Precoding

Mohd Hairi HALMI, Mohd Yusoff ALIAS, Teong Chee CHUAH

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Summary :

A method for estimating channel covariance from the uplink received signal power for downlink transmit precoding in multiple-input multiple-output (MIMO) frequency division duplex (FDD) wireless systems is proposed. Unlike other MIMO precoding schemes, the proposed scheme does not require a feedback channel or pilot symbols, i.e. knowledge of the channel covariance is made available at the downlink transmitter through direct estimation from the uplink received signal power. This leads to low complexity and improved system efficiency. It is shown that the proposed scheme performs better or on par with other practical schemes and only suffers a slight performance degradation when compared with systems with perfect knowledge of the channel covariance.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E94-A No.2 pp.833-837
Publication Date
2011/02/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E94.A.833
Type of Manuscript
LETTER
Category
Digital Signal Processing

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