Differential space-frequency trellis codes

Author

Hong, Zhihong ; Thibault, Louis ; Zhang, Liang

Author_Institution

Commun. Res. Centre, Ottawa, Ont.

Volume

5

Issue

10

fYear

2006

Firstpage

2664

Lastpage

2668

Abstract

A new differential space-frequency trellis coding (DSFTC) scheme is proposed for multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. The transmitter differentially encodes the message drawn from a set of unitary matrices following a trellis encoding rule. At the receiver, where no channel state information (CSI) is available, differential decoding and soft-input Viterbi algorithms are employed in the decoding process. The proposed codes can achieve full rate, 1 symbol/subcarrier, and full spatial diversity. Simulation results show that the proposed codes provide significant improvements over differential space-frequency block codes (DSFBC) due to increased coding gains

Keywords

MIMO systems; OFDM modulation; Viterbi decoding; diversity reception; radiocommunication; trellis codes; DSFTC; MIMO OFDM systems; coding gains; differential decoding; differential space-frequency block codes; differential space-frequency trellis codes; multiple-input multiple-output orthogonal frequency division multiplexing systems; soft-input Viterbi algorithms; spatial diversity; trellis encoding; unitary matrices; Block codes; Channel state information; Convolutional codes; Decoding; Fading; MIMO; Modulation coding; OFDM; Viterbi algorithm; Wireless communication;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2006.04633

Filename

1705926