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Full-Text Articles in Physical Sciences and Mathematics
Space Time Spreading With Modified Walsh-Hadamard Sequences, Peter James Vial, Beata J. Wysocki, I. Raad, Tadeusz A. Wysocki
Space Time Spreading With Modified Walsh-Hadamard Sequences, Peter James Vial, Beata J. Wysocki, I. Raad, Tadeusz A. Wysocki
Faculty of Informatics - Papers (Archive)
Previous work has shown that the performance of a space time spreading (STS) system using Walsh codes with two transmit antennas at the base station (BS) is degraded in the presence of mutual interference from adjacent sectors in the same cell. We use modified Walsh-Hadamard sequences exhibiting improved cross-correlation performance, which potentially mitigates the effects of MAI (multiple access interference). The presented study also looks at variation of sets of different modified Walsh-Hadamard codes being used by the adjacent interferer, with a hundred randomly selected pairings being chosen, as well as the case where one set of alternate codes is …
Two Complex Orthogonal Space-Time Codes For Eight Transmit Antennas, Le Chung Tran, Jennifer Seberry, Yejing Wang, Beata J. Wysocki, Tadeusz A. Wysocki, Tianbing Xia, Ying Zhao
Two Complex Orthogonal Space-Time Codes For Eight Transmit Antennas, Le Chung Tran, Jennifer Seberry, Yejing Wang, Beata J. Wysocki, Tadeusz A. Wysocki, Tianbing Xia, Ying Zhao
Faculty of Informatics - Papers (Archive)
Two new constructions of complex orthogonal space-time block codes of order 8 based on the theory of amicable orthogonal designs are presented and their performance compared with that of the standard code of order 8. These new codes are suitable for multi-modulation schemes where the performance can be sacrificed for a higher throughput.