复杂电磁条件下的辐射源信号分离方法

Emitter Signal Separation Method Under Complex Electromagnetic Environment

摘要:

针对复杂电磁环境下的辐射源信号分离问题,提出了一种基于数字信道化的分离方法。该方法首先基于滑动离散傅里叶变换设计了二级信道化结构,该结构可将不同类型的同时到达信号划分至不同信道；随后,设计跟踪滤波器对各信道输出峰值进行跟踪,利用跟踪结果完成时域交叠信号在时频域的分离,并在此基础上通过反变换获得不同信号的时域波形；仿真实验验证了文中所提算法的有效性。

Abstract:

To solve the problem of emitter separation under complex electromagnetic environment, a signal separationmethod based on digital channelizing was proposed in this paper. A two-level structure which could divide signal into dif.ferent channel was designed first. After that, the peaks of different channels were tracked using the track filter and the co.incident signals in time domain were separated in time-frequency domain. Finally, the time domain waveforms of differentsignals were acquired by reverse transformation. The validness of the proposed method was proved by experiment.