基于PSD估计的OFDM系统多径信道估计方法  

A multipath channel estimation method based on PSD estimation for OFDM systems

作　　者：李剑峰[1] 秦升平[2] 尹长川[1] 乐光新[1] 

机构地区：[1]北京邮电大学电信工程学院,北京100876 [2]山东经济学院信息管理学院,山东济南250014

出　　处：《电路与系统学报》2005年第6期73-75,79,共4页Journal of Circuits and Systems

基　　金：863重大研究课题(2001AA123016);国家自然科学基金资助项目(60172052;60002009);国家自然科学基金重大研究计划资助项目(90104018)

摘　　要：本文通过功率谱估计(PSD)估计来估计无线多径信道,然后在系统中进行信道均衡。仿真结果证明,PSD估计信道的均方误差优于最小二乘估计和最小均方误差估计的均方误差;通过信道均衡,系统性能基本接近于信道已知条件下的性能。Based on power spectrum density （PSD） estimation, a novel method for multipath channel estimation is presented. Channel equalization can be applied in the system using the channel estimation result. The simulation results show that the mean square error of the new channel estimation method is smaller than that of the methods based on least square and the minimum mean square error criterion. The performance of the equalized OFDM system is approximately the same to that of the system with an idealized channel estimation.

关 键 词：OFDM 多径信道 功率谱估计 信道估计 

分 类 号：TN929.5[电子电信—通信与信息系统]