Decision-feedback detection for block differential space-time modulation |
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Authors: | Zheng Du Beaulieu NC |
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Affiliation: | Dept. of Electr. & Comput. Eng., Alberta Univ., Edmonton, Alta., Canada; |
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Abstract: | Time variation on fading channels hinders accurate channel estimation in differential space-time modulation and deteriorates the performance. Decision-feedback differential detection is studied for block differential space-time modulation, and compared with conventional differential space-time modulation. It is observed that the proposed scheme does not suffer effective fading bandwidth expansion, as does the conventional scheme. An improved effective signal-to-noise ratio approach is proposed for analyzing the performance of the proposed scheme in time-varying flat Rayleigh fading. Theoretical analysis and simulations show the improved performance of the proposed scheme over the conventional scheme. |
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