一种衰落信道下OFDM信号的半盲检测算法

A semiblind detecting algorithm of OFDM signals in fading channels

本文提出了一种衰落信道下OFDM信号的半盲检测算法。采用文献[1]为时变OFDM信道建立的2维非线性递归模型,本文利用稀疏的导频符号估计信道响应,并运用最短路径搜索原理寻找原始的发送序列。计算机仿真结果证明,该算法对OFDM信号进行了快速、准确的半盲检测。

This paper proposed a semiblind detecting algorithm of OFDM signals in fading channels. Employing a 2-D nonlinear regression model[1] for a time-varying OFDM channels,we estimate the channel response accurately by inserting only sparse pilot symbols, and find a initial transmitting sequence based on the principle of minimum path searching. The result of computer simulation proves that the algorithm has carried out a fast and exact semiblind detection for OFDM signals.