Reduced complexity decoding of space time trellis codes in the frequency selective channel

Author

Turner, Jeremy ; Taylor, Desmond P.

Author_Institution

Dept. of Electr. & Comput. Eng., Univ. of Canterbury, Christchurch

Volume

57

Issue

3

fYear

2009

fDate

3/1/2009 12:00:00 AM

Firstpage

635

Lastpage

640

Abstract

An iterative approach is developed for decoding space time trellis codes (STTCs) in frequency selective multiple input multiple output (MIMO) channels. The method uses the partitioned Viterbi algorithm (PVA) as an equaliser for the MIMO system. It is used iteratively with a STTC decoder that provides soft outputs using the soft output Viterbi algorithm (SOVA). It is shown through simulation that the iterative procedure achieves a performance within 2.0 dB of maximum likelihood (ML) decoding, at a FER of 10^-2, but suffers a small diversity loss. It is also shown that the complexity of the iterative approach is lower than that of ML decoding.

Keywords

MIMO communication; Viterbi decoding; iterative decoding; maximum likelihood decoding; space-time codes; trellis codes; MIMO channels; equaliser; frequency selective channel; iterative approach; maximum likelihood decoding; multiple input multiple output channels; partitioned Viterbi algorithm; reduced complexity decoding; soft output Viterbi algorithm; space time trellis codes; Bandwidth; Convolutional codes; Frequency estimation; Intersymbol interference; Iterative decoding; Iterative methods; MIMO; Maximum likelihood decoding; Receiving antennas; Viterbi algorithm; MIMO systems, space-time coding, equalization, reduced complexity, Viterbi;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2009.03.070031

Filename

4799039