差分空时调制中酉信号星座的优化设计

Optimum Design of Unitary Signal Constellation for Differential Space-Time Modulation

为了获得差分空时调制系统中酉信号星座的设计参数,该文将旋转酉信号星座中信号矩阵的对角设计参数与旋转因子进行联合编码,提出一种基于遗传算法的设计参数联合优化算法.当信号星座或发射天线数目较大时,旋转酉信号星座的误码性能明显优于对角信号矩阵,该算法能够获得接近最优解的设计参数.

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.