基于双模型的综合孔径辐射计成像反演方法

Dual-Model Imaging Method for Synthetic Aperture Interferometric Radiometer

针对综合孔径成像中,基于单一模型的成像反演方法难以有效应对模型误差,进行准确图像重构的问题,提出了一种基于双模型(DM)的综合孔径成像反演方法,用于校正反演模型的参数误差,并对目标场景进行高精度的毫米波图像重构。鉴于傅里叶变换(MFFT)模型和G矩阵(GM)模型参数敏感性不同的特性,提出的DM方法首先通过比较两种模型的重构误差,对存在误差的成像参数进行准确校正;然后在精确GM模型的基础上,借助改进的正则化方法重建出高精度的目标图像。经仿真实验证明,相比于传统的单模型成像方法,提出的DM方法能够有效校正成像模型的参数误差,并对目标场景进行高精度的毫米波图像重构。

Since the single model imaging method cannot correct the model error and reconstruct the image effectively, we proposed a novel imaging method based on dual-model(DM) for synthetic aperture interferometric radiometer(SAIR) to reconstruct the millimeter wave image in this paper. In view of the different parameters sensitivity between modified Fourier transform(MFFT) model and G-matrix(GM) model, the proposed DM method firstly corrects the inaccurate parameters of the imaging model by comparing the reconstruction errors between two imaging models. Then the high-precision image is be reconstructed by the modified regularization method based on the accurate GM model and MFFT model. Finally, the simulation results demonstrate that the proposed DM method can correct the model parameters and reconstruct the millimeter wave images more accurately and efficiently.