一种多通道SAR高分辨率宽测绘带成像算法
doi: 10.3724/SP.J.1146.2006.00986
An Algorithm of Multichannel SAR High-Resolution and Wide-Swath Imaging
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摘要: 合成孔径雷达采用多个天线可以实现高分辨率、宽测绘(HRWS)带成像，增强信噪比，改善动目标检测时的模糊抑制性能。以HRWS成像为目的，该文提出了一种将接、收阵元的双通道数据映射成单通道数据的算法。该算法在二维频域可以根据平台速度变化，进行相位校正。并且在方位向只需一次傅里叶变换，因而具有较高的运算效率。性能分析和仿真结果表明了算法的有效性。Abstract: Synthetic Aperture Radar (SAR) with multiple antennas can realize High-Resolution Wide-Swath (HRWS) imaging，improve Signal to Noise Ratio (SNR) and improve ambiguity suppression for Moving Target Indication (MTI). This paper proposes an algorithm can realize HRWS imaging based on conversion bi-static data into mono-static data. The algorithm can correct phase according to velocity fluctuation of platform change. Furthermore the algorithm has high efficiency, for azimuth data need only one time FFT operation. Performance analysis and computer simulation are presented to illustrate the validity of the algorithm.
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