压缩感知SAR成像方法及抗相干干扰性分析

对合成孔径雷达(SAR)的干扰与抗干扰技术,目前已受到广泛的关注和研究。文中在分析了传统SAR成像及其相干干扰原理的基础上,利用压缩感知理论,探讨了一种压缩感知SAR成像方法,并分析了其抗相干干扰性。该方法通过构造满足RIP性质的观测矩阵和稀疏变换矩阵,在假设场景目标稀疏的条件下,准确重构出场景目标高分辨像,克服了由于SAR系统收到回波信号的脉内频率和脉间相位关系被破坏而无法利用传统二维匹配滤波成像方法获得准确场景目标高分辨像的问题,具有很好的抗相干干扰特性。最后给出了相关的仿真实验结果。

Compressed Sensing SAR Imaging Method and Analysis of Its Anti Coherent Jamming Character

Nowadays, the researches on jamming and anti-jamming technology for SAR are popular. In this paper, on the basis of analysis of SAR imaging theory and the coherent jamming theory against SAR, a Compressed Sensing SAR imaging method is discussed and its anti coherent jamming character is analyzed. In the method, the measurement matrix and the sparse transform matrix which satisfy RIP are designed. On the condition of sparse scene target is supposed, the high-resolution image of scene target is reconstructed exactly by using the Compressed Sensing SAR imaging method to realize the anti-jamming. Thus the problem of the effective image of scene target can not be obtained by using the traditional two dimension match filter because the relations of the frequency in a pulse and the phase in different pulses which are from the echoes are destroyed is come over. The related simulation results are shown in the last.