基于多信道的干扰消除信号接收方法

Scheme of Interference-cancellation for Multi-channel Signal Reception

提出一种多信道条件下带有Low-IF接收机的新型模数信号接收处理方法,一般Low-IF接收机中,镜频信号会对期望信号造成干扰。在该文方案下,由模拟复带通滤波器完成信道选择,干扰信号通过采用DLMS算法的FIR自适应滤波器消除。仿真分析表明,该方案对AD转换器复杂度要求低,有利于工程实现,而且能很好抑制邻近信道信号干扰,提高系统性能。

In this paper, an analog-digital signal processing for multi-channel reception with low-IF receiver is proposed. In conventional low-IF receivers,the signal in the image frequency causes interference to the desired signal. In the proposed analog-digital signal processing scheme, the channel selection is made by analog complex band pass filter and the signal is constructed by HR filter with DLMS algorithm to eliminate the interference .The simulation analysis shows that the proposed method has the low complexity requirement for ADCs in favor of the engineering implementation, as well as can cancel adjacent channel interference to improve the performance.