CDMA系统中时空信道冲激响应的估计与跟踪  

THE SPACE-TIME CHANNEL IMPULSE RESPONSE ESTIMATION AND TRACKING FOR CDMA

作　　者：蒋伯峰[1] 王文杰[1] 殷勤业[1] 

机构地区：[1]西安交通大学电信学院信息工程研究所,西安710049

出　　处：《电子与信息学报》2001年第12期1390-1395,共6页Journal of Electronics & Information Technology

基　　金：国家自然科学基金;国家"863"计划联合资助课题

摘　　要：时空信道可以用矢量信道冲激响应(VCIR)来描述,正确估计与跟踪时变的VCIR是智能天线技术实现的关键。本文利用子空间技术得到CDMA系统中各用户VCIR的估计值,结合近似子空间跟踪方法实现了对VCIR的跟踪,跟踪过程所需的运算量小。计算机仿真实验表明,跟踪的速度及精度基本可以满足智能天线系统的要求。Space-time channel can be described by Vector Channel Impulse Response (VCIR). Estimating and tracking the time varying VCIR is very important for smart antenna systems. In this paper an estimation and tracking method has been proposed. In this method, subspace technology has been used to estimate the VCIR, and approximate subspace tracking technology has been used to track the time varying VCIR. The tracking process has low computation burden. The computer simulation demonstrates that the VCIR tacking speed and accuracy can meet the need of smart antenna systems.

关 键 词：智能天线 时空信道 码分多址系统 冲激响应 移动通信 

分 类 号：TN929.533[电子电信—通信与信息系统] TN914.53[电子电信—信息与通信工程]