Abstract:Due to the motion of a target, radar return signals are usually LFM signals with unknown frequency and unknown frequency modulated rate. Fractional Fourier transform has recently attracted much attention in detection and parameter estimation of multi-component LFM signals. Fractional Fourier transform of LFM signal of finite duration is derived and a relation between coordinate of the peak and unknown parameters is given. Statistical characteristic of LFM signal with white noise in fractional Fourier domain is studied, a closed form expression is found for Signal-to-Noise Ratio(SNR), and it is compared with matched filter of ideal situation (i.e. parameters of LFM signal are known).
刘建成; 刘忠; 王雪松; 肖顺平; 王国玉. 高斯白噪声背景下的LFM信号的分数阶Fourier域信噪比分析[J]. 电子与信息学报, 2007, 29(10): 2337-2340 .
Liu Jian-cheng; Liu Zhong; Wang Xue-song; Xiao Shun-ping; Wang Guo-yu. SNR Analysis of LFM Signal with Gaussian White Noise in Fractional Fourier Transform Domain. , 2007, 29(10): 2337-2340 .