随机运动误差对双基地SAR的分辨率影响

The Influence of Random Motion Errors on Bistatic SAR Resolution

根据双基地SAR(Synthetic Aperture Radar)的随机运动误差特性,分析了由随机运动误差引起的相位误差对双基地SAR系统的分辨率影响.推导了在零均值运动误差下的均方根分辨率解析表达式.结合此表达式,确定了存在随机运动误差的系统中,选择高斯函数可以作为系统的最优加权函数以获得最优均方根分辨率,并推导了最优均方根分辨率的闭式解表达式.仿真结果验证了闭式解的有效性.

According to the characteristic of bistatic SAR（Synthetic Aperture Radar）. The effect of phase errors due to random motion errors on the resolution of airborne bistafic SAR is analyzed.For zero mean random motion errors,an analytical result of rms （root mean square） resolution is derived.Based on the derived model,in the bistatic SAR system with random motion errors, Gaussian function is found to be the optimum weighting function on azimuth processing and the best achievable rms resolution is obtained in closed form. Simulation results show the availability of the proposed solution.