基于天线选择的低秩信道MIMO系统容量研究  

Capacity of Deficient Rank MIMO Channels with Antenna Selection

作　　者：苏彦兵[1] 谈振辉[1] 

机构地区：[1]北京交通大学现代通信研究所

出　　处：《电子学报》2004年第3期395-398,共4页Acta Electronica Sinica

基　　金：国家自然科学基金 (No .90 1 0 4 0 1 6);博士学科点基金 (No .2 0 0 2 0 0 0 4 0 2 2 )

摘　　要：最近的研究表明 ,在衰落信道多天线MIMO系统的容量随发射天线数线性增加 .而对于低散射环境 ,即使信号经历独立的衰落 ,信道秩的降低也会严重影响系统容量的增加 .对于这种低秩环境 ,选择天线发射或接收可以有效地降低系统的成本 .本文研究了天线选择对低秩信道MIMO系统容量的影响 .仿真结果表明 ,对不同的信道条件 ,适当选择天线发射不仅可以增加信道容量 ,而且可以降低系统的复杂度和射频成本 .适当选择天线接收 ,在不严重降低系统容量的前提下 。Recent work has shown that capacity of a multiple-antenna MIMO system is increased linearly with the number of transmitter antennas in fading channels. For a poor scattering environment, the low-rank channel may result in a substantial degradation of capacity although fading is independent. In this situation, antenna selection is an effective way to reduce cost. Capacity of a low-rank MIMO channel with antenna selection is studied. The results of simulation show that antenna selection of transmitter not only can increase capacity, but can also reduce complexity and cost of RF chains for given channels. Antenna selection of receiver also can reduce cost under the condition of not decreasing capacity.

关 键 词：天线选择 多天线MIMO系统 信道容量 秩 无线移动通信系统 信道衰落 

分 类 号：TN929.5[电子电信—通信与信息系统]