Quasi-orthogonal space-time block coded transceiver systems over frequency selective wireless fading channels
Lei He; Hongya Ge
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP apos;04). IEEE International Conference on
Volume 2, Issue , 17-21 May 2004 Page(s): ii - 321-4 vol.2
Digital Object Identifier   10.1109/ICASSP.2004.1326259
Summary: We propose a new block time-reversal conjugate based quasi-orthogonal space-time block encoding and decoding (QO-STBC) scheme for a wireless system with four transmit antennas in frequency selective fading channels. The proposed scheme effectively combats channel dispersion and frequency selectivity due to multipath, yet still provides full diversity gain. We also propose a maximum likelihood (ML) solution, with a simple decoupled structure, to decode the block time-reversal conjugate QO-STBC symbols at low complexity for channels with short delay.

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