MIMO系统信道容量分析  

Analysis of the capacity for MIMO system

作　　者：顾正刚[1] 

机构地区：[1]江苏信息职业技术学院,江苏无锡214000

出　　处：《宁波职业技术学院学报》2010年第2期26-31,共6页Journal of Ningbo Polytechnic

摘　　要：研究了MIMO系统中的功率分配算法,重点研究了平均功率分配法、注水功率分配法以及最小误比特率功率分配法,得到了3种功率分配法的功率分配矩阵,从而得到信道容量。并用Matlab进行仿真,得到了3种功率分配法下的信道容量与信噪比的关系。通过仿真结果可以看出,在信道状态信息已知的情况下,MIMO系统能得到更大的信道容量。并且相对于其他两种分配法而言,使用注水算法,可以显著的提高MIMO系统容量。The power allocation is studied in MIMO system,focus on the equal power allocation,waterfilling and the method of power allocation which can get a lowest error rate.It has got three different power allocation matrixes through the research,as well as the channel capacity.Through matlab simulation,the relationship between channel capacity and the SNR was obtained by three power distribution method.The results show that MIMO system can get greater channel capacity under the channel state information is known And in relation to other two distribution methods,using waterfilling method can significantly increase the capacity of MIMO system.

关 键 词：MIMO 信道容量 平均功率分配 注水法 最小误码率 

分 类 号：TN914[电子电信—通信与信息系统]