NDLI: MMSE-based MIMO precoder using partial channel information

Content Provider	IEEE Xplore Digital Library
Author	Bahrami, H.R. Le-Ngoc, T.
Copyright Year	2005
Description	Author affiliation: Dept. of ECE, McGill Univ., Montreal, Que., Canada (Bahrami, H.R.; Le-Ngoc, T.)
Abstract	This paper presents a precoder design based on the minimum mean squared error (MMSE) criterion and using the knowledge of only the transmit and receive correlation matrices of the underlying MIMO channel. The optimal transformations are shown to be eigen-beamformers, which transmit the signal along eigenvectors of the transmit correlation matrix. Power loading across the eigenbeams are determined based on eigenvalues of both transmit and receive correlation matrices and can be viewed as a waterpouring policy. Performance of the proposed precoders using partial channel information in various MIMO channels is evaluated and compared to that of precoders based on full channel knowledge at transmitter. It was shown that as the number of the transmit and receive antennas increases, the MMSE-based MIMO precoders using partial channel knowledge can achieve the performance of precoders using full channel knowledge. Furthermore, the channel that gives the best performance is the one with only one strong eigen mode for cases with a large number of receive antenna or a small number of transmit antenna. For small number of receive antennas or large number of transmit antennas, the full rank channel with equal gain eigen modes will gives the best performance.
Starting Page	211
Ending Page	216
File Size	477763
Page Count	6
File Format	PDF
ISBN	0780391810
DOI	10.1109/WIMOB.2005.1512841
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Wireless communication Transmitters Transmitting antennas Bit error rate Receiving antennas Space time codes Performance gain MIMO Eigenvalues and eigenfunctions Helium
Content Type	Text
Resource Type	Article

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