DocumentCode :
2214935
Title :
A reduced-complexity soft-input soft-output detection scheme for wideband MIMO channels
Author :
De Jong, Yvo L C ; Willink, Tricia J.
Author_Institution :
Commun. Res. Centre, Ottawa, Ont., Canada
Volume :
2
fYear :
2004
fDate :
5-8 Sept. 2004
Firstpage :
810
Abstract :
This work presents a reduced-complexity soft-input soft-output detection scheme for wideband space-time bit-interleaved coded modulation (ST-BICM) MIMO systems. This scheme, which is referred to as iterative trellis search detection, is based in part on a reduced-complexity variant of the BCJR algorithm. It also uses signal sets with block partitioning labeling, called multilevel mapping constellations, in order to achieve further complexity reduction for higher-order QAM modulation formats. Results from computer simulations of an iterative ("turbo") MlMO receiver employing the new scheme have shown that it successfully eliminates the error floor that occurs if inter-symbol interference is not mitigated. It is also shown that the optimum choice of the number of fingers employed by the detector is not only dependent on the channel characteristics, but also by the fraction of states considered in the trellis search.
Keywords :
MIMO systems; broadband networks; channel coding; computational complexity; interleaved codes; intersymbol interference; iterative decoding; modulation coding; quadrature amplitude modulation; radio receivers; signal detection; trellis codes; turbo codes; QAM modulation; block partitioning labeling; intersymbol interference; iterative trellis search detection; multilevel mapping constellations; reduced-complexity soft-input soft-output detection scheme; turbo code; wideband MIMO channels; wideband space-time bit-interleaved coded modulation; Constellation diagram; Interleaved codes; Iterative algorithms; Labeling; MIMO; Modulation coding; Partitioning algorithms; Quadrature amplitude modulation; Signal mapping; Wideband;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on
Print_ISBN :
0-7803-8523-3
Type :
conf
DOI :
10.1109/PIMRC.2004.1373812
Filename :
1373812
Link To Document :
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