【摘要】 采用分数阶傅里叶变换域频率分析方法,针对线性调频连续波信号分数阶傅里叶变换的特性,提出了分数阶域相差法,可以在低信噪比条件下对线性调频连续波信号进行检测,获得多普勒频移与实验的精确参数估计。同时时频参数联合估计中不必进行二维搜索,具有快速、高效的特点。计算机仿真结果表明了该方法的有效性。更多还原

【Abstract】 Based on the fractional Fourier transform of linear frequency modulated continuous signal,a new algorithm for joint parameter estimation of LFM: difference method in domain frequency is proposed.Doppler frequency shift and time delay of LFM signal can be estimated even for low SNR case without two-dimensional search,so that the method is of high efficiency.Simulation results show that the method is valid.更多还原