分数阶Fourier变换对LFM信号的特征参数估计能力仿真评估

将分数阶傅里叶变换（FrFT）对线性调频（LFM）信号处理方法应用到雷达侦察信号分选与参数估计中,研究FrFT对LFM信号在低信噪比下的检测与参数估计能力。设定了雷达侦察信号背景,制定了仿真验证流程,考察了FrFT对LFM信号的调频率和中心频率的估计能力,对比了不同信噪比下的参数估计运算时间。仿真结果验证了该算法可以完成低信噪比条件下雷达侦察LFM信号特征参数的估计。

Simulation Assessment of Fractional Fourier Transform Method to The Characteristic Parameters Estimation Ability for LFM Signals

This paper applies the signal processing method of fractional Fourier transform（FrFT） used to linear frequency modulation（LFM） signal to radar reconnaissance signal sorting and parameters estimation,studies the signal detection ability and parameter estimation ability of FrFT to the LFM signal under the condition of low signal-noise ratio（SNR）.The background of radar reconnaissance signals is set and the simulation validation flow is made,in order to test the estimation abilities of the frequency modulation rate and the central frequency of FrFT to LFM signals,compares the operation time of parameters estimation under the different SNR in this paper.The simulation results demonstrate that the algorithm can finish the parameter estimation of radar reconnaissance signals under the low SNR.