空间相关连续衰落信道下对角酉空时星座的最大似然多符号差分检测算法  

Maximum-Likelihood Multiple Symbol Differential Detection for Unitary Space-Time Modulation in continuous fading with spatial correlation

作　　者：蓝兴[1] 丁丁[1] 魏急波[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《信号处理》2009年第12期1932-1936,共5页Journal of Signal Processing

摘　　要：空间相关性会造成MIMO系统的性能损失。针对这种空间相关性,大部分酉空时系统利用反馈信道将空间相关信息反馈给发射机,发射机通过有效利用该信息,进一步提高系统的性能。本文针对实际应用的另一种情形,当酉空时系统不存在反馈信道时,提出了空间相关连续衰落信道下,对角酉空时星座的最大似然多符号差分检测算法。与传统的准静态信道模型相比,本算法基于连续衰落假设,是一种更一般的信道模型。计算机仿真结果表明:本算法可以在不明显增加开销的情况下,有效的提高空间相关连续衰落信道下对角酉空时星座的误码率性能。Spatial correlation cause performance loss of MIMO systems. For a unitary space-time system in the presence of spatial correlation, the receiver send the spatial correlation information to the transmitter through feed back channels, the performance of the system can be further improved by effectively utilizing this information at the transmitter. In this paper, we focus on another practical environment that the unitary space-time systems do not have feedback channels. We present the maximum-likelihood multiple symbol differential detection for the diagonal signal in continuous fading channels with spatial correlation. Compared with quasi-static channel model, continuous fading channel is a generalized model. Simulation results show that our scheme can improve the bit error rate performance effectively with a small cost.

关 键 词：空间相关 差分酉空时调制 最大似然多符号差分检测 

分 类 号：TN911[电子电信—通信与信息系统]