差分空时分组编码的研究作者：刘小群来源：《现代电子技术》2010年第21期
摘 要:一般在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)接收端在解码时不需要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太高,此时接收端不能获得CSI,因而需要差分空时编码。对非相干系统中空时编码的编译码原理、特点和性能进行了分析和比较,并对其中的部分空时编码给出了具体的实例和仿真结果。
关键词:非相干系统; 信道状态信息; 差分空时编码; 信道估计
中图分类号:TN929.5-34文献标识码:A
文章编号:1004-373X(2010)21-0013-02
Study on Differential Space-Time Coding
LIU Xiao-qun
(Department of Physics and Information Technology, Baoji University of Science and Arts, Baoji 721016, China)
Abstract: An accurate channel estimation at receiving end is needed for decoding of common space-time coding, while the channel state information (CSI) and channel estimation are not needed for DSTC. Under the circumstances where wireless channels fade very rapidly or the data rate is very high, the channel estimation is too hard or too costly to detect, the DSTC is required. In this paper, the encoding and decoding theories, features, and performances of space-time coding for incoherent system are introduced, and the comparison between them is presented. The examples and simulation results are proposed.
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