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Differential space-frequency trellis codes

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3 Author(s)
Zhihong Hong ; Commun. Res. Centre, Ottawa, Ont. ; Thibault, L. ; Zhang, L.

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

Published in:

Wireless Communications, IEEE Transactions on  (Volume:5 ,  Issue: 10 )

Date of Publication:

Oct. 2006

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