OFDM分集接收系统上行链路信道估计研究

Channel Estimation in the Uplink of an OFDM System with Receiver Diversity

对采用时频块组帧的OFDM(正交频分复用)上行链路信道估计进行了研究,给出了基于二维DFT(离散傅里叶变换)的信道估计算法,针对传统二维信道估计方法的边缘效应提出了一种改进办法,即采用分块拟合的方法对信道曲面边缘部分进行补偿估计。仿真表明,改进的二维DFT信道估计方法可以有效地消减边缘效应,从而获得更好的系统性能。

In this paper, we present a new channel estimator based on two-dimensional Fourier transform in the uplink of an OFDM system with receiver diversity. In order to reduce edge effects, an improved 2-D DFT-based channel estimator is presented. The new method improves the performance of channel estimation by re-estimating the edges of the time-frequency plane of the channel. The simulation results show that the proposed estimator tracks more accurately with the muhipath fading channel and obtain better Bit Error Rate （BER） results.