NDLI: Low-complexity nulling-canceling detection algorithm for coded MIMO systems with near-optimal performance

Content Provider	IEEE Xplore Digital Library
Author	Mo, W. Wang, Z.
Copyright Year	2005
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Iowa State Univ., Ames, IA, USA (Mo, W.; Wang, Z.)
Abstract	We propose a nulling/canceling algorithm for decoding coded multi-input multi-output (MIMO) transmissions over flat fading channels. The algorithm works with a soft-input soft-output error-control decoder to iteratively detect the information symbols. Our algorithm is based on the BLAST (Bell-Labs Layered Space-Time) nulling/canceling algorithm, with the following differences: i) prior information from the error-control decoder is incorporated, ii) the ordering is based on a posteriori probabilities instead of signal to noise ratio (SNR), and iii) soft (as opposed to hard) interferences computed from a posteriori probabilities are canceled. Based on a previous work on low-complexity nulling/canceling without prior information and with SNR ordering, we present a modified "square-root" algorithm for the proposed nulling canceling detection scheme, with cubic-order complexity. We compared the performance of an iterative detection and decoding scheme based on the proposed MIMO detector and that based on a maximum a posteriori (MAP) detector. In a 4/spl times/4 system, our proposed detector had the same performance as the MAP detector for binary phase-shift keying (BPSK) modulation. For 16-quadrature amplitude modulation, our algorithm came within 1 dB of the performance of an approximated MAP detector, list sphere decoder, at bit error rate of 10/sup -4/.
Starting Page	570
Ending Page	574
File Size	878173
Page Count	5
File Format	PDF
ISBN	0780388674
DOI	10.1109/SPAWC.2005.1506204
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-06-05
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detection algorithms MIMO Iterative algorithms Detectors Iterative decoding Signal to noise ratio Interference cancellation Phase detection Fading Phase shift keying
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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