该文讨论了干涉合成孔径雷达(INSAR)的二维相位展开算法。先简要给出了INSAR相位差图(干涉相位图)误差的统计特性,并说明了该误差可以近似为高斯型噪声。然后介绍了利用FFT的最小二乘的二维相位展开算法(简称LS-FFT),实验表明LS-FFT法对高斯白噪声具有很好的抗干扰性(Robustness)。最后,提出了LS-FFT算法的并行处理想法,计算机模拟结果也证实了该想法的正确。

This paper mainly focuses on the 2-D phase unwrapping algorithm for Interferometric Synthetic Aperture Rader (INSAR). The statistical property of error in the phase differences of INSAR (Interferogram) is firstly presented in brief, which shows this error could be assumed to be Gaussian noise. The algorithm of least-square 2-D phase unwrapping using FFT(LS-FFF) is then discussed, and it is proved to have a good property of robustness in Gaussian noise. Finally, the idea of parallel processing for LS-FFT is put forward, and is verified with the computer simulations.