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针对电子战截获接收机不能适应复杂战场电磁环境的实际情况,分析了接收信号造成非完整性的具体原因,根据非完整信号截获时间起点变化和谱泄漏的实际情况,首先采用基于分段加窗自相关的方法对非完整信号的初始相位进行了校正,然后再通过波形模式匹配的方法搜索整周期的起止点,其次在起止点已知的基础上对信号采取整周期重采样或收发时长调整的两种方式建立非完整信号自适应的动态截获模型。最后通过仿真实验给出了该算法对典型LPI雷达LFM信号的实现效果,表明其能够有效改善现有电子战截获接收机系统中信号截获时间起点限制和频谱泄露造成的信号能量缺失对后续处理性能的影响,较好地解决了现代战场电磁环境下的复杂信号缺失问题。
Aiming at the fact that the electronic warfare intercepted receiver can not adapt to the actual situation of the complex battlefield electromagnetic environment, the specific reason of the non-integrality of the received signal is analyzed. According to the fact that the starting point of the incomplete signal intercepting time changes and the spectrum leakage, The method of self-correlation corrects the initial phase of the non-complete signal, and then searches for the starting and ending points of the whole cycle through the waveform pattern matching. Secondly, based on the known starting and ending points, The two ways to establish a non-complete signal adaptive dynamic capture model. Finally, the simulation results show that this algorithm can achieve the LFM signal performance of a typical LPI radar. It shows that this algorithm can effectively improve the performance of the existing electronic warfare intercepted receiver system when the starting point of the signal acquisition time limit and the signal energy loss caused by the spectrum leakage have no effect on the subsequent processing performance The problem of complex signal missing in the electromagnetic environment of modern battlefield is well solved.