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微波强度关联成像技术通过发射时空两维随机辐射场,并与接收的目标回波强度数据进行关联以实现超天线孔径限制的微波成像。作为一种新型静止雷达成像技术,其不同模型参数对于重构图像辐射性能影响尚不明确。基于微波强度关联成像模型,通过改变模型参数设置,可以获得观测矩阵和重构图像的辐射特性变化趋势,以此分析不同参数设置下图像的辐射性能。分析结果表明:改进天线阵元数目、带宽等模型参数,能有效提高图像辐射性能,尤其是大场景高分辨率的成像区域;增大天线平台高度和网格长度,图像辐射性能有所降低;对于地物均匀的场景,系统设计要求相对较低。分析结果将有助于改善系统设计参数。
Microwave intensity correlation imaging technology by transmitting space-time two-dimensional random radiation field, and receive the target echo intensity data associated with the realization of the microwave antenna imaging aperture limitations. As a new type of stationary radar imaging technology, the influence of different model parameters on the radiation performance of the reconstructed image is not clear. Based on the microwave intensity correlation imaging model, the change of radiation characteristics of the observed matrix and the reconstructed image can be obtained by changing the parameters of the model, and the radiation performance of the image under different parameters is analyzed. The results show that the improvement of the model parameters such as the number of antenna elements and the bandwidth can effectively improve the radiation performance of the image, especially in the high-resolution imaging area of large scenes. The antenna height and the grid length are increased and the radiation performance of the image is reduced. For the scene of uniform objects, system design requirements are relatively low. The results of the analysis will help to improve the system design parameters.