一种空时分组码预编码的均衡算法研究

摘要

In order to improve the MIMO system performance of orthogonal space-time block codes, the authors proposed a straighfforward combination of conventional equalizer and space-time block decoder ,which combines the orthogonal spacetime block codes and pre-coded matrix at the transmitter and decodes with MMSE equalization at the receiver, and from the analysis of MMSE and ML algorithm, it can be found that MMSE algorithm performs about 05 dB than ML algorithm at BER= 10-5.%为了提高正交空时分组码的MIMO系统性能,提出了采用预编码的空时分组码信号检测方案,该方案在发射端将正交分组编码和预编码矩阵相结合,在接收端采用MMSE均衡译码算法.分析了最小均方误差(MMSE)均衡译码算法和最大似然(ML)译码算法,将此两种算法的性能与最大比值合并(MRC)的性能进行了仿真和比较.仿真结果表明,MMSE算法与ML算法性能相比在误比特率为10-5时有约0.5 dB的增益.