基于MIMO系统的差分解码算法及性能分析  

Differential Decoding Algorithm and Performance Analysis based on MIMO System

作　　者：孙刚[1] 魏东兴[1] 王伟[2] 

机构地区：[1]大连理工大学信息与通信工程学院 [2]中国人民解放军66440部队

出　　处：《通信技术》2014年第5期488-493,共6页Communications Technology

摘　　要：针对两用户MIMO系统,首先提出了一种基于正交空时分组码的部分差分解码算法,接收端获得一个用户的信道状态信息即可实现对两个用户的解码;然后给出了一种针对两用户MIMO系统的完全差分解码算法,可以在没有任何一个用户的信道状态信息情况下进行解码;最后针对该算法进行了复杂度分析和旋转预编码优化,并通过仿真给出了最优旋转角度。计算机仿真证明该完全差分解码算法有效地降低了解码复杂度。A partially differential decoding algorithm based on orthogonal space time block code is proposed for two-user MIMO system. In this algorithm, the receiver only needs to obtain one of the users＇ channel state information to decode the two users＇ transmitted sequences. Then an additional differential decoding scheme is presented that can work properly when neither the transmitter nor the receiver of the two users knows the channel. Finally the complexity of the algorithm is calculated. The scheme uses a rotated ver- sion of selected constellation and the optimized rotation angles are obtained by numerical simulation. The simulation results show that the proposed differential decoding algorithm has a lower decoding complexity.

关 键 词：MIMO 正交差分编码 两用户 低解码复杂度 

分 类 号：TN914[电子电信—通信与信息系统]