4G OFDM通信系统中自适应信道估计方法  

A Novel Adaptive DFT-based Channel Estimation Method for OFDM System

作　　者：李春亭[1] 陶立南[1] 

机构地区：[1]上海贝尔阿尔卡特,上海201206

出　　处：《电信科学》2005年第12期39-42,共4页Telecommunications Science

摘　　要：本文提出了4GOFDM移动通信系统中一种新型的自适应信道估计方法。利用信道冲激响应的最重要分量,本自适应信道估计方法能有效地降低子载波间干扰和高斯白噪声的影响。根据性能仿真结果比较,本方法在MSE、BER上表现优于变换域插值、时域插值方法。A feedback DFT-based channel estimation method for OFDM system is investigated. The proposed feedback method employs the most significant taps （MST） of channel impulse response so that inter-subcarrier interference and additive white Gaussian noise components are significantly reduced. The performances of the proposed method, transform domain interpolation, time domain interpolation are compared in muhipath channel. The simulation results show that the proposed method has better MSE and BER performance than the other methods.

关 键 词：信道估计 OFDM DFT IDFT 通信系统 

分 类 号：TN91[电子电信—通信与信息系统] TN929.5[电子电信—信息与通信工程]