空时分组码的差分检测和多符号差分检测

在介绍差分空时分组码编译码原理的基础上,给出了基于最大似然判决的差分检测和多符号差分检测方案,并对这两种译码方案的性能进行了比较。相对于普通的相干译码,这两种方案在发射和接收端都不需要对传输信道进行估计,因此具有较低的译码复杂度。最后,通过仿真结果可以看出相干检测、差分检测和多符号差分检测性能间的差异。

Differential Detections Method of Space- time Block Codes Multiple- symbol Differentia Detection of Space- time Block Codes

With the introduction of method of space-time block, differential detection and multiple-symbol differential detection based on the maximum likelihood judgment are put forward. Compared with coherent detection, these two schemes doesn't need channel information at both transmitter and receiver. So they have low complexity of coding and decoding algorithms. At the end, we give the difference of the performance about coherent detection, differential detection and multiple-symbol differential detection through the simulation result.