sar图像去噪的几种新的方法，分析了该信号的时域、频域、倒谱，循环谱等,有PMUSIC 校正前和校正后的比较。- Several new methods sar image denoising, Analysis of the signal time domain, frequency domain, cepstrum, cyclic spectrum, etc. A relatively before correction and after correction PMUSIC.