Abstract:

To get design parameters of unitary signal constellation for differential space-time modulation, a novel algorithm using genetic search is presented, which combines diagonal parameters and rotation factors of rotated unitary signal constellation into a codeword. The error performance of unitary signal constellation with rotated matrix is better than diagonal matrix, and the error performance of the codeword with the proposed design parameters is better than that described in the literature. The proposed algorithm can obtain design parameters very close to the optimal design.

Key words: multiple-input multiple-output, differential space-time modulation, unitary signal constellation, genetic algorithm