BAQ压缩回波数据的噪声影响分析

Analysis of Noise Effect on BAQ for Echo Data Compression

星载SAR下行数传链路易受噪声干扰,降低了回波数据质量。针对星载SAR下传链路中的回波数据压缩受噪声干扰的影响,构造了解压缩回波数据误差矩阵,将误差矩阵分解为3个具有各自含义矩阵,建立了噪声对BAQ压缩的影响模型。最后利用RADARSAT-1的实测回波数据进行了仿真实验,基于SAR图像质量评价指标的评估结果表明了分析的正确性。

Spaceborne SAR downlink is easily jammed by noise,which can degrade the quality of echo data.This paper analyzes the noise effect on BAQ compression echo data by constructing decompression echo data error matrix.Through separating error matrix decomposition into three sub-matrices,each of which has its own meaning,the paper analyzes the affecting process of noise on compression echo data and makes simulation using RADARSAT-1 real echo data.Validity of analysis is indicated using evaluation results based on SAR image quality evaluation guideline.