THE SPECTRAL ANALYSIS OF NON-LINEAR CODING COMPRESSED RAW DATA OF SYNTHETIC APERTURE RADAR
合成孔径雷达原始数据非线性量化压缩频谱分析

In this paper, a spectral analysis method is presented to assess the quality of Synthetic Aperture Radar(SAR) image whose raw data is non-linear coding compressed. Usually, it is assumed that the SAR raw data compression will result in the reduction of Signal to Noise Ratio(SNR), and the image quality is therefore degraded, but the resolution of image is not reduced. By means of the spectral analysis method in this paper, it is demonstrated the SAR data frequency spectrum is not reduced after the compression, and the SAR image resolution is retained. The effects of distortion resulted from the data compression is also analysed.