多径信道阶数的盲检测方法

A Blind Multi-Path Channel Order Detection Method

多径信道阶数的检测是通信系统中信道估计的首要步骤,其检测的准确度直接关系到系统的性能。该文利用OFDM信号的循环平稳特性以及接收信号周期自相关函数值的能量分布规律,借助信息论准则提出了一种盲信道阶数检测方法。基于OFDM系统的仿真结果表明与已有盲信道阶数检测方法相比,该方法具有更好的估计性能。

Multi-path channel order detection is the first step of channel parametric estimation in communication,its accuracy directly affects the performance of the system.From using cyclostationarity characteristics,energy dis-tribution of cycle autocorrelation function,and information AIC criteria,we propose a novel blind channel order de-tection method.Computer simulation results show that the proposed method is superior to the other methods.