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BHU-2D干涉综合孔径微波辐射计是北京航空航天大学电磁工程实验室研制的一套10单元、T形阵列、8mm波段二维干涉综合孔径原理样机,文章针对其在实验室环境下的快速傅立叶变换(FFT)反演算法和G矩阵反演算法进行了计算机仿真。在FFT算法中,分析了校正残余误差对反演成像的影响;在G矩阵算法中,分析了成像距离误差和可视度测量误差对反演成像的影响。最后用BHU-2D干涉综合孔径微波辐射计对“U”形人造目标进行了实际成像,实验结果和仿真结果取得了较好的一致性,结果表明在BHU-2D干涉综合孔径微波辐射计中FFT反演算法比G矩阵反演算法具有更好的实用性和稳定性。
BHU-2D interference integrated aperture microwave radiometer is a set of 10 units, T-array, 8mm band two-dimensional interference integrated aperture principle prototype developed by the electromagnetic engineering laboratory of Beijing University of Aeronautics and Astronautics. In this paper, Transform (FFT) inversion algorithm and G matrix inversion algorithm for computer simulation. In the FFT algorithm, the influence of the residual error on the inversion imaging is analyzed. In the G matrix algorithm, the influence of imaging distance error and visibility measurement error on the inversion imaging is analyzed. Finally, the “U” shape artificial target was actually imaged by the BHU-2D interferometric synthetic aperture microwave radiometer. The experimental results and the simulation results achieved good agreement. The results show that in the BHU-2D interferometric synthetic aperture microwave radiometer The FFT inversion algorithm has better practicability and stability than the G matrix inversion algorithm.