基于BEM的时变信道估计与均衡  

BEM-based TV Channel Estimation and Equalization

作　　者：张晶晶[1] 葛万成[1] ZHANG Jing-jing, GE Wan-cheng （Chinese-German School for Postgraduate Studies, Tongji University, Shanghai 200092, China）

机构地区：[1]同济大学中德学院,上海200092

出　　处：《电脑知识与技术》2012年第8期5383-5387,共5页Computer Knowledge and Technology

基　　金：德国罗德与施瓦茨公司资助

摘　　要：该文针对无线通信中的时变信道，推导了基函数扩展模型（BEM）的算法，并在BEM的基础上，设计了针对TDS—OFDM传输系统采用最小二乘和线性最小均方误差估计时变信道参数值的估计算法，以及相应的时变信道均衡算法。仿真结果表明基于BEM信道估计可以很好的拟合真实信道，采取相应的均衡算法后，系统的误码率性能得到明显改善，与PN序列自相关和线性插值均衡算法相比，所设计的均衡算法具有更低的误码率。Regarding to the time-varying channel in wireless mobile communication system, we＇ll detailed descript the Basis Expansion Model （BEM）. We using TDS-OFDM signal transmission, least squares （LS） and linear minimum mean square error estimation to estimate the channel parameters and corresponding equalization algorithm. The simulation results show that taking BEM-based channel estimation algorithm and corresponding equalization algorithm can significantly improve the system＇s bit error rate, compared with PN sequence auto- correlation and hnear interpolation equalization algorithm, based on BEM and fixed BEM have lower error rate.

关 键 词：BEM 时变信道估计 时变信道均衡 

分 类 号：TN925[电子电信—通信与信息系统;电子电信—信息与通信工程]