WCDMA卫星移动通信RAKE接收机性能分析  

Performance analysis of RAKE receiver for WCDMA in satellite communication

作　　者：倪娟[1] 黄国策[1] 佟阳[2] 陈强[1] 陈茂[3] 

机构地区：[1]空军工程大学信息与导航学院,陕西西安710077 [2]空军装备研究院,北京100085 [3]通信网络技术管理中心,甘肃兰州730000

出　　处：《计算机工程与设计》2013年第6期1901-1905,共5页Computer Engineering and Design

基　　金：国家自然科学基金项目(60802053);航空科学基金项目(20095596016);陕西省电子信息系统综合集成重点实验室基金项目(201104Y06)

摘　　要：研究了基于WSSUS模型的UHF频段卫星移动信道模型,利用该模型在四种典型的信道环境下进行相干RAKE接收,在搭建的RAKE接收仿真平台上,比较了三种不同RAKE合并方式下的误码率性能。仿真结果表明,公共导频符号信道估计能有效地克服传统数据符号中时分插入导频符号传输方式在高速运动和快速变化信道中估计不准确的问题,特别在机载信道环境下,接收机性能有明显提高,同时不会产生多余的时隙延迟,信道跟踪实时性强,算法简单。The satellite mobile channel model in UHF based on WSSUS is researched, and coherent RAKE receiving is carried out in four typical scenes. The performance of BER is compared in three different combining methods on RAKE simulation platform established. The simulation results show that channel estimation using common pilot symbols efficiently overcomes estimation inaccuracy on fast time-varying and high speed mobile channel compared with time-multiplexed pilot symbol aided style. Especially on airborne scene, the performance of RAKE receiver has improved obviously, and this new method has less computational complexity in algorithm and less slot delay, what＇s more, the ability of real-time channel tracking is impressive .

关 键 词：卫星移动通信 公共导频序列 RAKE接收机 信道模型 信道估计 

分 类 号：TN911[电子电信—通信与信息系统]