相关MIMO信道下可变数目天线选择算法  

Number Variable Antenna Selection Algorithms for Correlated MIMO Channels

作　　者：李晓辉[1] 易克初[1] 黑永强[1] 刘乃安[1] 

机构地区：[1]西安电子科技大学综合业务网国家重点实验室,陕西西安710071

出　　处：《系统仿真学报》2007年第24期5759-5762,5767,共5页Journal of System Simulation

基　　金：国家自然科学基金(60702060);西安电子科技大学研究生院创新基金课题(创05014)。

摘　　要：提出两种多入多出(MIMO)系统可变数目天线选择算法,来动态适应多种相关MIMO信道环境。基于特征值准则的算法按照最小特征值与特征值总和之比动态选择天线,避免天线间的高度相关性;基于容量准则的算法在保证容量接近最大值的条件下,最小化天线数目。仿真结果表明,两种算法在天线选择后的容量均接近选择前的情况;通过结合链路自适应技术,可进一步得到优于无天线选择系统的数据速率和误码性能。Two antenna selection algorithms with variable antenna number were proposed to fit all kind of wireless correlated multi-input multi-output （MIMO） channel environment dynamically. Using eigenvalue criterion, the algorithm selected the antennas dynamically according to ratio of minimum eigenvalue and sum of the eigenvalues, to avoid the high correlation among the selected antennas. The algorithm based on the capacity criterion was proposed, in which the number of the selected antennas was minimized without evident capacity loss. The simulation results show that the capacity after selection is similar to that of the original system. Moreover, the higher data rate and the better BER performance can be obtained by coming with link adaptation techniques.

关 键 词：多入多出(MIMO) 相关信道 天线选择 容量 特征值 链路自适应 

分 类 号：TN929.5[电子电信—通信与信息系统]