MIMO系统信道容量研究Study of MIMO Channel Capacity
孙丹,张晓光
摘要(Abstract):
针对单用户MIMO系统信道的容量特性展开研究。首先详细推导了无衰落信道下信道容量表达式,然后重点分析了瑞利衰落信道下,接收端已知信道状态信息,发射端已知信道状态分布时的容量特性。最后分别针对瑞利衰落信道下,采用发射分集、接收分集以及BLAST传输结构的系统容量进行仿真。仿真结果表明:给定发射功率,独立的瑞利衰落信道条件下,MIMO系统容量随最小天线数目的增加而线性增加,极大地提高了系统容量。
关键词(KeyWords): MIMO;信道容量;瑞利衰落;移动通信系统
基金项目(Foundation): 国家自然科学基金(60577046);; 北京市教育委员会共建计划项目(XK100130537)
作者(Author): 孙丹,张晓光
参考文献(References):
- [1]Telatar E.Capacity of Multi-antenna Gaussian Channels[J].Eur.Trans.Telecomm.,1999,10(6):585-595.
- [2]James A T.Distributions of Matrix Variates and LatentRoots Derived from Normal Samples[J].Annals of Mathe-matical Statistics,1964,35(2):475-501.
- [3]Alex Grant.Rayleigh Fading Multi-Antenna Channels[J].Eurasip Journal on Applied Signal Processing,2002(3):316-329.
- [4]Smith P J,Shafi M.On a Gaussian Approximation to the Ca-pacity of Wireless MIMO Systems.IEEE International ConfCommun.ICC,2002,1:406-410.
- [5]Gallaer R G.Information Theory and Reliable Communica-tion[M].New York:John Wiley&Sons,1968.
- [6]Foschini G J.Layered Space-time Architecture for WirelessCommunication in Fading Environment when Using Multi-ele-ment Antennas[J].Bell Labs Tech.J.,1996,1(2):41-59.