The Effect on SAR Image of Quantization Number for Echo Data

In order to select proper quantization number of spaceborne SAR echo data, the impact on image quality caused by quantization number of spaceborne SAR(Synthetic Aperture Radar) echo data is analyzed. Firstly, the full-link signal processing model of spaceborne SAR system is built. Secondly, according to uniform quantization model, the echo data is quantized. Thirdly, the quantized echo data is focused by chirp scaling algorithm, using point target. Moreover, the image quality is evaluated, including the peak power and SNR. Experiment results based on simulated data prove the proper quantization number of spaceborne SAR echo data.