基于CDMA20001xEV-DV的自适应反馈智能天线系统方案  

Adaptive feedback smart antennas for CDMA2000 1x EV-DV

作　　者：陈泽强[1] 杨大成[1] 周锡增 

机构地区：[1]北京邮电大学电信工程学院,北京100876 [2]台湾元智大学

出　　处：《电路与系统学报》2004年第6期40-44,共5页Journal of Circuits and Systems

基　　金：国家重点基础研究发展规划项目(973)课题基金资助项目(G1998030409)

摘　　要：本文提出了一种基于CDMA20001xEV-DV的自适应反馈智能天线系统方案,该方案中智能天线在反向链路采用N-LMS算法进行波束成形;移动台根据从前向公共导频信道和前向辅助导频信道获得的智能天线增益信息,经R-CQICH信道反馈到基站,基站根据反馈信息动态地控制波束方向,实现对用户的跟踪。仿真结果表明,该方案能充分利用现有的信道资源,进一步提高系统的Ec/Io,改善系统的容量和覆盖。A novel smart antenna scheme—the Adaptive Feedback Smart Antennas (AFSA) for CDMA2000 1x EV-DV systems is proposed. The scheme is based on the Reverse Channel Quality Indicator Channel (R-CQICH) beamforming gain feedback measured at the mobile station and the adaptive searching and tracking of the smart antennas at the base station. The N-LMS adaptive algorithm is used in the scheme to locate the initial direction of the desired user in the uplink signal processing. The smart antennas search and track the specific subscriber according to the beamforming gain feedback via R-CQICH in the downlink. Simulation is performed to verify the accordance of the proposed scheme with the theoretical analysis. It is shown that the Ec/Io for the desired subscriber can be improved notably while the intracell interference is reduced efficiently.

关 键 词：智能天线 CDMA2000 1x EV-DV 移动通信 

分 类 号：TN929.53[电子电信—通信与信息系统]