说明：  在细化选带频谱分析中,复调制细化方法(ZFFT)和线性调频Z变换方法(Ch irp-Z变换)是常用的两种方法。对于发生严重干涉现象的密集多频率谐波成分,ZFFT通过增大细化倍数后重采样,把干涉的各频率成分分离后进行校正可获得高精度的信号参数。
(In the frequency spectrum analysis of refined band selection, ZFFT and Chirp-Z transform are two commonly used methods. For the dense multi frequency harmonic components with serious interference, ZFFT can obtain high-precision signal parameters by increasing the thinning multiple and resampling, separating the frequency components of interference and correcting them.)