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Iterative QR Detection for BLAST

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Abstract

We study an iterative detection algorithm of an uncoded multi-transmittermulti-receiver system. The main data stream is demultiplexed into Msubstreams, and each substream is modulated independently then transmitted byits dedicated antenna. The receiver disposes of N ≥ M antennas. Over eachreceive antenna the signal is a superposition of the M substreams affected byindependent fades and disturbed by AWGN. The detection algorithm is based onthe QR decomposition of the channel transfer matrix which is then used toperform hard or soft inter-substream interference cancellation. Comparisonsare done with the V-BLAST optimal order (OPT) detection algorithm. Theproposed algorithm is 4 to 8 times less complex than that of the V-BLAST OPT,while maintaining comparable performance.

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Authors and Affiliations

  1. ENST de Paris, 46, rue Barrault, 75634, Paris, Cedex 13, France

    M.O. Damen, K. Abed-Meraim & S. Burykh

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  1. M.O. Damen
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  2. K. Abed-Meraim
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  3. S. Burykh
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Damen, M., Abed-Meraim, K. & Burykh, S. Iterative QR Detection for BLAST. Wireless Personal Communications 19, 179–191 (2001). https://doi.org/10.1023/A:1012514205925

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