一种基于多发射天线的差分空时编码  

Differential Space-time Coding Based on Multiple Transmit Antenna

作　　者：刘小群[1] 

机构地区：[1]宝鸡文理学院物理与信息技术系,陕西宝鸡721016

出　　处：《山西电子技术》2011年第2期49-50,56,共3页Shanxi Electronic Technology

摘　　要：一般的空时编码解码时接收端需要信道状态信息(CSI),因而必须获得精确的信道估计;而差分空时编码(DSTC)接收端解码时不需要CSI,因而不需要信道估计。在信道衰落快或信息传输速率高的情况下,实时而精确的信道估计非常困难或代价很高,此时接收端不能获得CSI,因而需要差分空时编码。文章对多发射天线的差分空时编码的编译码原理、特点和性能进行了分析和比较,并对其中的部分差分空时编码给出了具体的实例和仿真结果。When being decoded,common STC requires channel state information（CSI）,so the accurate channel estimates is needed.But DSTC doesn＇t require it.Under the circumstances where wireless channels fade very rapidly or the data transmitting rate is very high,it is too hard to get the accurate channel estimates and it costs too much,so the DSTC is required.In this paper,the encoding and decoding theories,features,and performances of differential space-time coding（DSTC） based on multiple transmitting antenna is analyzed and compared.Also it presents the examples and simulation results of them.

关 键 词：多发射天线 信道状态信息 差分空时编码 

分 类 号：TN92[电子电信—通信与信息系统]