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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/4648

Title: Space-Time Turbo Equalization in Frequency Selective MIMO Channels
Authors: Abe, Tetsushi
Matsumoto, Tadashi
Keywords: Iterative channel estimation
multiple-input-multiple-output (MIMO) system
turbo equalization
Issue Date: 2003-03
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: IEEE Transactions on Vehicular Technology
Volume: 52
Number: 3
Start page: 469
End page: 475
DOI: 10.1109/TVT.2003.813227
Abstract: A computationally efficient space-time turbo equalization algorithm is derived for frequency-selective multiple-input-multiple-output (MIMO) channels. The algorithm is an extension of the iterative equalization algorithm by Reynolds and Wang for frequency-selective fading channels and of iterative multiuser detection for code-division multiple-access (CDMA) systems by Wang and Poor. The proposed algorithm is implemented as a MIMO detector consisting of a soft-input-soft-output (SISO) linear MMSE detector followed by SISO channel decoders for the multiple users. The detector first forms a soft replica of each composite interfering signal using the log likelihood ratio (LLR), fed back from the SISO channel decoders, of the transmitted coded symbols and subtracts it from the received signal vector. Linear adaptive filtering then takes place to suppress the interference residuals: filter taps are adjusted based on the minimum mean square error (MMSE) criterion. The LLR is then calculated for adaptive filter output. This process is repeated in an iterative fashion to enhance signal-detection performance. This paper also discusses the performance sensitivity of the proposed algorithm to channel-estimation error. A channel-estimation scheme is introduced that works with the iterative MIMO equalization process to reduce estimation errors.
Rights: Copyright (c)2003 IEEE. Reprinted from IEEE Transactions on Vehicular Technology , 52(3), 2003, 469-475. This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of JAIST's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to pubs-permissions@ieee.org. By choosing to view this document, you agree to all provisions of the copyright laws protecting it.
URI: http://hdl.handle.net/10119/4648
Material Type: publisher
Appears in Collections:b10-1. 雑誌掲載論文 (Journal Articles)

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