【摘要】 强度相当的多分量LFM信号在Wigner-hough(WHT)平面上呈现出多个尖峰值,各尖峰值对应各分量在时频平面上频率轴上的初始频率和调频斜率。提出了一种基于WHT的多分量LFM信号的参数估计与信号分离算法。该算法结合解线调和窄带滤波器分离和估计各分量的参数的算法,可以一次提取多个尖峰值。仿真结果证明,此方法可有效地对多分量IJM信号进行精确的参数估计与分离且不出现虚假信息。更多还原

【Abstract】 The multi-componecnt linear frequency modulation (LFM) signal with comparative energy has presented many peak values in the wigner-hough transform (WHT) plane, and each peak value is corresponding to the initial frequency and the frequency-modulated slope of each term in time frequency (TF) plane. A new algorithm of the parameter estimation and the signal separating is presented based on multi-component LFM signal with the WHT. This algorithm combined with the algorithm estimating and separating parameters of each component using Dechirp Narrowband filter can pick up many peak value once from the WHT plane. The simulation results indicate the algorithm can estimate effectively and precisely the parameters of each LFM signal and separate them without false information.更多还原