获得发射分集的增强型空间调制设计与仿真  

Research and Simulation on Extended Spatial Modulation with Achieving Transmit Diversity

作　　者：俞萍[1] YU Ping(School of Data Science and Computer Science,Guangdong Peizheng College,Guangzhou 510830,Guangdong,China)

机构地区：[1]广东培正学院数据科学与计算机学院,广东广州510830

出　　处：《韶关学院学报》2022年第6期22-26,共5页Journal of Shaoguan University

基　　金：广东培正学院重点科研项目(pzxjzd10);广东培正学院重点科研项目(18pzxmzd03).

摘　　要：针对增强型空间调制(ESM)方案中信号发射端未实现发射分集的问题,提出了一种能够获得发射分集增益的增强型空间调制(ESM-TD)方案,其中发射天线数目分成两个天线组.在ESM-TD方案中,将输入的比特流分成3块数据流:信号映射比特流和两块空间索引比特流;通过两块空间索引比特流,从天线索引矢量集中选择的两个矢量分别激活两个天线组中一根或两根天线,用于发射信号映射比特流映射得到的一个或两个信号星座符号.进一步,分析和比较了ESM-TD方案与其他方案的发射符号之间平方最小欧式距离.仿真结果表明,在相同频谱利用率时ESM-TD方案优于其他方案的误比特率性能,进一步增强无线通信可靠性.Based on the problem that the transmit diversity has not been realized in enhanced spatial modulation(ESM)scheme,this paper proposes a new scheme of ESM with achieving transmit diversity(ESMTD),in which transmit antennas(TAs)are divided into two groups.In the ESM-TD scheme,the coming information bits are divided into three blocks:signal mapping bits and two blocks of spatial index bits.Through two blocks of spatial index bits,two vectors selected from the antenna index vector set are respectively used to activate one or two TAs in the two TA groups for transmitting one or two constellation symbols mapped by the signal mapping bits.Furthermore,the squared minimum Euclidean distance between the transmitted symbols are analyzed and compared with other schemes.At the same spectral efficiency,simulation results show that ESM-TD has better bit error ratio than that of other schemes,and further enhances the reliability of wireless communication.

关 键 词：发射分集 增强型空间调制 最小欧式距离 频谱利用率 误比特率 

分 类 号：TN929.5[电子电信—通信与信息系统]