NDLI: Fano Multiple-Symbol Differential Detectors for Differential Unitary Space

Content Provider	IEEE Xplore Digital Library
Author	Pun, P.K.M. Ho, P.K.M.
Copyright Year	1972
Abstract	We present a class of suboptimal multiple-symbol differential detectors (MSDDs) for differential unitary space-time (ST) codes in a time-selective Rayleigh flat-fading channel. These noncoherent detectors, termed Fano ST-MSDDs, employ the well-known Fano algorithm as their decoding engines. Their bit-error rate (BER) performance is excellent, as there is no irreducible error floor, even at very high fade rates. Compared with the sphere decoder, which is optimal, our best detector, termed an on-demand bi-Fano ST-MSDD, suffers only a 0.3 dB degradation in power efficiency. However, its computational complexity, as a function of the signal-to-noise ratio (SNR), is consistently lower than that of the sphere decoder and does not experience the exponential growth in complexity in the latter when the SNR decreases. It can thus be concluded that the Fano algorithm is a powerful detection strategy for differential ST codes in fading channels. Our main contribution is in making the modifications and improvements to the Fano algorithm that enables this realization. The innovations include the bi-Fano, edge-bi-Fano, and on-demand bi-Fano search strategies, as well as a new dynamic threshold adjustment scheme for avoiding unnecessary back-and-forth node evaluations during backtracking
Starting Page	540
Ending Page	550
Page Count	11
File Size	916008
File Format	PDF
ISSN	00906778
Volume Number	55
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Detectors Bit error rate Fading Maximum likelihood decoding Rayleigh channels Degradation Computational complexity Signal to noise ratio Wireless communication Robustness sequential decoding Fano algorithm fast Rayleigh fading multiple-symbol differential detection (MSDD) noncoherent space–time (ST) demodulation
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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