一种基于滤波器组的信号提取方法

摘要

在如今复杂的电磁环境中，不可避免地会遇到多个信号同时到达的情况，基于多相滤波组的信道化结构能较好地解决多个信号同时到达的问题，但是当信号带宽过宽时会出现信号跨道问题。跨道后的信号会失去部分重要信息，即使经过信道融合，仍然不能保证信号的完整性。在多个信号同时到达的前提下，为了保持信号的完整性，提出了一种利用全景监视与滤波器组相结合的方法来完成有效信号的完整提取。通过Matlab仿真验证了该方法的正确性、有效性。%In today's complex electromagnetic environment, the simultaneous arrival of multiple signals is inevitable, and this problem can be solved by the channelized structure based on polyphase filter banks.However,cross⁃rchannel signal problems will occur when the bandwidth of the signal is too wide,and the cross⁃rchannel signal will lose some important information.Even after channel inte⁃gration,the integrity of signal still cannot be ensured.To maintain the integrity of signals when they arrive simultaneously,an effective signal extraction method combining panoramic surveillance and filter banks is proposed.Through Matlab simulation,the correctness and effectiveness of the method are verified.