DocumentCode :
759209
Title :
Bound-intersection detection for multiple-symbol differential unitary space-time modulation
Author :
Cui, Tao ; Tellambura, Chinthananda
Author_Institution :
Dept. of Electr. & Comput. Eng., Univ. of Alberta, Edmonton, Alta., Canada
Volume :
53
Issue :
12
fYear :
2005
Firstpage :
2114
Lastpage :
2123
Abstract :
This paper considers multiple-symbol differential detection (MSD) of differential unitary space-time modulation (DUSTM) over multiple-antenna systems. We derive a novel exact maximum-likelihood (ML) detector, called the bound-intersection detector (BID), using the extended Euclidean algorithm for single-symbol detection of diagonal constellations. While the ML search complexity is exponential in the number of transmit antennas and the data rate, our algorithm, particularly in high signal-to-noise ratio, achieves significant computational savings over the naive ML algorithm and the previous detector based on lattice reduction. We also develop four BID variants for MSD. The first two are ML and use branch-and-bound, the third one is suboptimal, which first uses BID to generate a candidate subset and then exhaustively searches over the reduced space, and the last one generalizes decision-feedback differential detection. Simulation results show that the BID and its MSD variants perform nearly ML, but do so with significantly reduced complexity.
Keywords :
antenna arrays; differential detection; maximum likelihood detection; space-time codes; tree searching; bound-intersection detection; branch-and-bound; decision-feedback differential detection; diagonal constellations single-symbol detection; differential unitary space-time modulation; extended Euclidean algorithm; maximum-likelihood detector; multiple-antenna systems; multiple-symbol detection; signal-to-noise ratio; transmit antennas; AWGN; Channel state information; Detectors; Differential quadrature phase shift keying; Lattices; Maximum likelihood detection; Phase detection; Receiving antennas; Signal to noise ratio; Transmitting antennas; Differential space–time coding; maximum-likelihood (ML); multiple-symbol differential detection (MSD);
fLanguage :
English
Journal_Title :
Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
0090-6778
Type :
jour
DOI :
10.1109/TCOMM.2005.860056
Filename :
1556837
Link To Document :
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