基于分段随机FFT的干扰分析方法

Jam Analysis Method Based on Piecewise-random FFT

为了在雷达对抗中快速而准确的发现干扰并获取干扰信号的参数,提出了一种基于分段随机FFT的干扰分析方法。传统完整频谱分析运算量巨大,而分段FFT方法虽然降低了运算量,但频谱分析不完整。所提分段随机FFT频谱分析方法在降低运算量的同时,保证了干扰信号频谱的分析完整性与估计精度,适合通用雷达平台的工程实现。给出了算法步骤与流程图,便于工程中的程序编写。通过多次实验仿真验证了该方法的有效性。

In order to detect the radar jamming quickly and obtain the parameters of the jamming signal accurately during the radar countermeasure,a new jam analysis method based on piecewise-random FFT is proposed.The computing load of the traditional full-band spectrum analysis is large,the piecewise FFT method reduces the computing cost but it leads to incomplete spectrums.The proposed piecewise-random FFT method of spectrum analysis could reduce the computational cost while maintaining the analysis integrity and the spectrum estimation precision of the jamming signal.This method is appropriate for engineering realization with general radar platform.For the convenience of the programming in engineering,the steps and the flow chart of the new method are presented.The validity of the proposed method is proved through multiple experiment simulations.