计算机科学 ›› 2017, Vol. 44 ›› Issue (5): 71-74.doi: 10.11896/j.issn.1002-137X.2017.05.013
魏霖静,宁璐璐,练智超,代永强,王联国
WEI Lin-jing, NING Lu-lu, LIAN Zhi-chao, DAI Yong-qiang and WANG Lian-guo
摘要： 为了提高广义空间调制(GSM)互信息的性能,提出了一种新的基于椭球算法的预编码方案。首先,为了对含有互信息的预编码器进行优化,推导出了有限字符输入下的GSM互信息解析表达式。在最大化GSM互信息的过程中,为了解决联合预编码设计的非凸耦合问题,将GMS系统转换成虚拟的多输入多输出(MIMO)系统。然后,在考虑所有子信道功率约束的条件下,使用了扩展的椭球算法。实验结果表明,提出的预编码方案大大提升了GSM互信息的性能。
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