一种差分空时分组码及其性能分析  

Differential Space-time Block Code and Performance Analysis

作　　者：高媛媛[1] 李建东[1] 

机构地区：[1]解放军理工大学通信工程学院无线通信系,江苏南京210007

出　　处：《军事通信技术》2008年第2期77-80,共4页Journal of Military Communications Technology

摘　　要：文中介绍了一种差分空时分组码的编译方法及其性能分析,与之对比,先导入单天线时差分调制的概念及其方法,理论分析表明,采用无需信道估值的差分空时分组码与相干检测空时分组码相比其性能差3 dB,但与单天线相比仍有接近于10 dB的分集增益。An algorithm for coding and decoding of a Differential Space-Time Block Code(DSTBC) was introduced in this paper.The principle of an SISO differential modulation was discussed as a sample.It reveals that the error performance of non-coherent detection of DSTBC is about 3 dB worse than that of the coherent detection of OSTBC,but is still about 10 dB better than that of SISO systems.

关 键 词：差分空时分组码 正交设计 酉矩阵 相干最大似然检测 信道估值 

分 类 号：TN91[电子电信—通信与信息系统]