In this paper, a transmit diversity scheme for SM-MIMO based on Weyl group encoding is introduced, where the information bits are encoded into matrices that belong to a coset of Weyl group first and the columns of these matrices are mapped onto the constellation as a second step. The advantage obtained here is that only one antenna will be active during a time slot, and single stream ML decoding is possible. Constellation rotation is then applied to maximize coding gain distance. This Weyl group Encoded Transmission (WET-SM) scheme achieves a rate higher than STBC-SM and CIOD based SM diversity schemes, with much less computational complexity. The BER performance also is compared with that of STBC-SM and SM-CIOD for the same transmission rate. It is found that the achieved performance of WET-SM is good considering the high rate of transmission and less computational complexity, especially when large number of antennas are involved.
Wireless Personal Communications – Springer Journals
Published: Aug 23, 2017
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