NDLI: Uniform decomposition of mutual information using MMSE decision feedback detection

Content Provider	IEEE Xplore Digital Library
Author	Jian-Kang Zhang Davidson, T.N. Wong, K.M.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., McMaster Univ., Hamilton, Ont. (Jian-Kang Zhang; Davidson, T.N.; Wong, K.M.)
Abstract	We consider efficient techniques for the design of a transceiver for a matrix channel with minimum mean square error (MMSE) decision-feedback (DF) detection when perfect channel information is available at both the transmitter and receiver. By combining the canonical property of the MMSE-DF detector and our recently developed equal-diagonal QRS decomposition of a matrix we obtain a uniform decomposition of mutual information in which each of the synthesized scalar subchannels has the same mutual information (under the assumption of error-free feedback). To assist our analysis of this uniform decomposition, we provide a new QR interpretation of the MMSE-DF receiver. This enables us to show that the natural detection order is optimal (in an SINR sense), and that for the proposed transmitter, the MMSE-DF detector is asymptotically equivalent to the maximum likelihood detector when the SNR is high. We also derive a low-complexity quadratic recursive algorithm for the characterization of all eligible S-factors in the QRS decomposition. When coupled with our QR interpretation of the MMSE-DF detector, this enables us to efficiently design the optimal transmitter and to efficiently implement the MMSE-DF receiver
Starting Page	714
Ending Page	718
File Size	190873
Page Count	5
File Format	PDF
ISBN	0780391519
DOI	10.1109/ISIT.2005.1523429
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-09-04
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Mutual information Feedback Transmitters Matrix decomposition Detectors Maximum likelihood detection Arithmetic Transceivers Mean square error methods Signal to noise ratio
Content Type	Text
Resource Type	Article

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