摘要
cdma20001xEV-DO前向链路导频信道为时隙突发模式,在没有用户的时候,数据时隙空闲,此时跟踪环路中断,在下个相邻数据时隙到来时,码相位和频偏发生了变化,同时导频突发长度短的特点对系统的信道估计提出了更高的要求。在总结现有各种信道估计算法的基础上,对比分析了其优缺点和适用的环境,仿真了实际工程中常用的算法,给出了比较结果,从而为信道估计的硬件实现提供了一定的参考。
The pilot channel data of cdma2000 lx EV-DO forward link is delivered in burst mode. The data slots are idle and the tracking loop is disturbed without any users, therefore in the next adjacent data slot, the phase of PN code and frequency offset change, what＇s more, the short burst length of pilot data deserves more precise channel estimation. Based on the summary of every kind of channel estimation algorithms, the advantages and disadvantages are analyzed, and the suitable environment is given, and the algorithms in common use are simulated, and the compared results are given, hence this paper provides a reference for the hardware realization of channel estimation.
出处
《电信科学》
北大核心
2010年第3期41-45,共5页
Telecommunications Science
基金
国家"863"计划基金资助项目(No.2009AA011504)
