中文摘要：

在OFDM通信系统中，信道参数估计一直是个备受关注的问题。本文利用接收端分集，提出了一种改进的盲信道估计算法，它适用于有无虚拟子载波，有无循环前缀的各种情况，在一定的信道精度要求条件下，可以在一个OFDM符号内进行信道估计。计算机仿真显示，在积累相同的接收符号时，本算法也比同类的盲信道估计算法的性能好。

英文摘要：

Channel estimation is very important problem that has been paid muehu attention in OFDM communication system. In this paper, a improved blind OFDM channel estimation algorithm is proposed using receiver diversity. It suits for all OFDM signal structure whether the virtue subcarriers and CP are present or not, and can be used to recover the channel response within only a single OFDM block under some condition. The computer simulation results show that the algorithm is efficient in computation and performance compared with most existing blind algorithms.