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VCIR是智能天线系统实现的关键技术 .本文从多用户解相关的思想出发 ,利用子空间技术实现了非周期扩频的CDMA系统时空信道的盲估计 ,所给出的时空信道估计方法具有抗远近效应的能力 .计算机仿真实验表明 。
Space-time channel can be described by vector channel impulse response (VCIR). Estimation of the VCIR is very important for Smart Antenna Systems. Based on multi-user decorrelation, a blind VCIR estimation method for CDMA with aperiodic spreading code is proposed. The new method has the ability to resist near-far effect. Computer simulation demonstrates that the accuracy of the VCIR estimated by the new method can meet the need to extract DOA and time delay information.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2001年第6期778-781,共4页
Acta Electronica Sinica
基金
国家自然科学基金!(No .6 9872 0 2 9)
国家博士点基金!(No .19990 6 980 8)
深圳华为公司科技基金
关键词
时空信道
非周期扩频
盲估计
码分多址系统
移动通信
Antenna arrays
Communication channels (information theory)
Computer simulation
Estimation
Mathematical models
Matrix algebra
Space time adaptive processing
Spread spectrum communication
