一种基于多路径对消的直达波干扰抑制算法研究

A Direct Interference Mitigation Algorithm Based on Multi-path Cancellation

在对自适应直达波抑制算法分析的基础上,给出了一种基于多路径对消的直达波抑制算法：首先,利用多路径对消器把参考通道中的多路径干扰对消掉,剩余信号作为参考直达波信号;然后,在目标通道中利用该参考信号进行自适应直达波抑制,抑制掉信号通道中的直达波干扰,提高目标回波的检测概率。该算法相对于自适应直达波干扰抑制算法,可用于参考通道中含有多路径干扰的环境,且具有较好的直达波干扰抑制效果。

On the basis of analyzing the algorithm of adaptive direct wave mitigation,a new algorithm is presented,which is based on the multi-path cancellation method.First in the reference channel a multi-path cancellation is utilized to mitigate the multi-path interference,the output signal is the reference signal of direct wave.Then in the target channel,this reference signal is used for the direct interference mitigation adaptively.So the target echo detection probability is enhanced.Relative to the adaptive direct wave mitigation algorithm,this algorithm can be used for the situation in which there is multi-path interference in the reference channel.Simulation results demonstrate better direct interference mitigation.