摘要
CDMA信号经解扩后 ,采用传统高分辨率算法MUSIC和ESPRIT ,估计信号的DOA方向。然后 ,用阵列响应矢量作为加权系数 ,保证基站接收到最大的信号能量。通过仿真 ,研究了这一系统在移动通信环境下的性能 ,包括信道衰落、信号角度扩散及同频干扰用户等对DOA估计的影响。仿真结果表明 :DOA估计误差和误码率与信号衰落。
Presents a CDMA smart antenna system based on DOA estimation. The system uses the conventional high-resolution algorithms, MUSIC and ESPRIT, to estimate the DOA of the received signals, which are dispread. Then the array response vector is used as weight to assure that base station can receive the maximal power for the desired signal. We studied the performances of this system by simulations, including the impacts of channel fading, angle spread and co-channel interference on DOA estimation. The simulation results indicate that the estimation error of DOA is closely related with channel fading, angle spread and number of co-channel users. However the estimation error of DOA has a few influences on the error rate of this system.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2001年第4期380-383,共4页
Journal of Zhejiang University：Engineering Science
基金
浙江省自然科学基金资助项目 (2 2 3J97130 32 8)
