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This paper presents space-time block codes (STBC) constructed by the orthogonalization of Walsh-Hadamard transform domain coefficients. The novel Walsh-Hadamard STBC (WHSTBC) provides full rate and full diversity order when the number of receive antennas is at least equal to the number of transmit antennas, with appropriate pre-coding of the PSK or QAM modulated symbols. Hadamard matrices exist for...
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