Title :
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
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;
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
DOI :
10.1109/ICC.2008.676
