阵列天线波束成形技术在宽带CDMA下行链路中的应用  

Application of Antenna Array Beam-forming Techniques Used on the Downlink of Wide-band CDMA

作　　者：颜永庆[1] 高西奇[1] 尤肖虎[1] 

机构地区：[1]东南大学移动通信国家重点实验室,江苏南京210008

出　　处：《电路与系统学报》2003年第3期98-103,共6页Journal of Circuits and Systems

基　　金：国家杰出青年基金资助项目(69725001)

摘　　要：本文利用自适应天线阵列上行链路信号到达角估计信息,并结合导频辅助下行链路信道矩阵估计值,在前人提出的具有反馈特性的自适应发送阵列原理基础上,提出一种简单可行的宽带CDMA下行链路天线阵列波束成形权重计算方法,并进一步分析了到达角估计误差和信道信息反馈时延对权重计算的影响,最后给出系统误码率性能的计算机仿真结果。Based on the present technique on adaptive antenna array with feedback. A new weight estimation algorithm for downlink beam-forming on wide-band CDMA is proposed. According to this algorithm, estimation of direction of arrival (DOA) of uplink signals and the estimation of the channel matrix of downlink pilot signals are utilized to aid the weight estimation. The influence on the performance of downlink beam-forming by the error of DOA estimation and the delay caused by feedback are further analyzed. At last, simulation results concerning the performance of the down-link beam-forming are given.

关 键 词：自适应天线阵列 波束成形 下行链路 宽带CDMA 

分 类 号：TN914.3[电子电信—通信与信息系统]