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应用科学学报

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差分空时调制中酉信号星座的优化设计

黄炳刚, 武欣嵘, 周志杰, 赵陆文   

  1. 解放军理工大学 通信工程学院，江苏 南京 210007

  • 收稿日期:2007-12-04 修回日期:2008-06-15 出版日期:2008-09-27 发布日期:2008-09-27
  • 通信作者: 黄炳刚

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

HUANG Bing-gang, WU Xin-rong, ZHOU Zhi-jie, ZHAO Lu-wen   

  1. Institute of Communications Engineering, PLA University of Science and Technology, Nanjing 210007, China

  • Received:2007-12-04 Revised:2008-06-15 Online:2008-09-27 Published:2008-09-27
  • Contact: HUANG Bing-gang

摘要：

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.

关键词: 多输入多输出, 差分空时调制, 酉信号星座, 遗传算法

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

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