【摘要】 本文从匹配Fourier变换的角度给出了Chirp -Fourier变换的定义、意义和离散实现。分析表明 ,LFM信号的Chirp -Fourier变换的峰值对应的坐标即为其初始频率和调频斜率 ,所以应用Chirp -Fourier变换可以估计LFM信号的参数。仿真试验表明 ,应用Chirp -Fourier变换不但可以有效地估计LFM信号的参数 ,而且有很好的抗噪声干扰能力。更多还原

【Abstract】 The definition, physical senses and discrete form of Chirp-Fourier transform are discussed from the point of view of match Fourier transform. Analysis results show that the peak of LFM signal Chirp- Fourier transform accords with original frequency and slope of frequency modulation. So the parameters of LFM signals can be estimated using Chirp-Fourier transform. Simulation results have showed that this method is not only of accurate estimation of the parameter, but also good at reducing noisy.更多还原