多宽带干扰信号频域甄别方法与分离算法

Multi-wideband jamming signals identification method and separation algorithm in frequency domain

针对复杂电磁环境下的时频域重叠干扰信号,提出了频域甄别方法与分离算法。先通过分析所接收干扰信号的频谱,将整个频段分割为一个或多个子带,对每个子带内是否有频域重叠进行甄别判断;对于存在频域重叠的情况,通过波束形成技术,以波束接收的方式将子带中的重叠信号在空域分离。最后,将相同入射方向的频段进行拼接。仿真结果验证了该算法的有效性。

For time-frequency domain overlapping jamming signals in complex electromagnetic environment, an identification method and a separation algorithm are proposed. Firstly, the whole frequency band is divided into one or more sub-bands via analyzing the received jamming signals＇ spectrum. Every sub- band is judged whether exists over-lapping in frequency domain. The overlapped signal in the sub-band is separated in space domain by beam forming technology. At last, frequency bands with same incident direction are jointed together. Simulation results verify the effectiveness of the proposed algorithm.