An Improved Soft-Output Trellis/Tree Iterative Decoder for High-Order BICM on MIMO Frequency Selective Rayleigh Fading Channels

Author

Wong, Kitty K Y ; McLane, Peter J.

Author_Institution

Dept. of Electr. & Comput. Eng., Queen´´s Univ., Kingston, ON

fYear

2008

Firstpage

3593

Lastpage

3598

Abstract

This paper presents an improved soft-output trellis/tree M-algorithm (SOTTMA) (Wong and McClane, 2006) for reduced-complexity equalization of a high-order modulated MIMO system undergoing equal-power, Rayleigh frequency-selective fading. This improved version reduces the amount of computation by approximately half through the utilization of a mapping scheme with multi-level bit-mapping properties (de Jong and Willink, 2002). The complexity of the improved SOTTMA no longer increases with the constellation size and therefore can be applied to equalize systems with high- order modulation (such as 64-QAM).

Keywords

MIMO communication; Rayleigh channels; equalisers; iterative decoding; modulation; tree codes; trellis codes; MIMO frequency selective Rayleigh fading channels; SOTTMA; high-order modulation; multiple-input multiple-output system; soft-output trellis-tree M-algorithm; system equalization; tree iterative decoder; Fading; Frequency; Iterative algorithms; Iterative decoding; MIMO; Maximum likelihood decoding; Receiving antennas; Signal detection; Signal mapping; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2008. ICC '08. IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2075-9

Electronic_ISBN

978-1-4244-2075-9

Type

conf

DOI

10.1109/ICC.2008.676

Filename

4533712