降低MIMO系统中预编码复杂度的均值方案  

A mean scheme reducing the precoding complexity in MIMO systems

作　　者：王永建[1,2] 杨德森[2] 

机构地区：[1]哈尔滨工业大学通信技术研究所,黑龙江哈尔滨150001 [2]哈尔滨工程大学水声工程学院,黑龙江哈尔滨150001

出　　处：《哈尔滨工程大学学报》2009年第5期564-569,共6页Journal of Harbin Engineering University

基　　金：国家自然科学基金资助项目(60803144)

摘　　要：在多输入-多输出(MIMO)通信系统中,如果发射端能够获得当前信道的准确状态信息(CSI),则可以在发射端进行优化设计来改善整个系统的传输性能.但是其优化设计的经典类注水算法大大增加了发射端预编码的复杂度.为了降低MIMO系统发射端预编码处理的复杂度,提出了一种新的均值方案.该方案利用信道奇异值的均值去代替类注水算法中的实时奇异值.仿真结果表明,该方案在能够准确表征MIMO系统信道容量和其他性能的前提下,可以降低约一个数量级的复杂度.In multiple-input multiple-output （MIMO） communication systems, if perfect channel state information （CSI） at the transmitter can be known, then transmitter-side optimization would significantly improve the system＇s performance. However, the classic water-filling-alike algorithms deduced by optimization designs can greatly increase the complexity of the process at the transmitter end. A new mean scheme was developed for decreasing precoding complexity, replacing real-time singular values of a channel in the water-filling-alike algorithms with mean values for the signal channel. Simulation results demonstrated that it can reduce the complexity of precoding and effectively characterize channel capacity and other performance parameters of MIMO systems.

关 键 词：多输入-多输出 预编码 注水算法 均值 奇异值 

分 类 号：TN914.5[电子电信—通信与信息系统]