Abstract This work details an interference mitigation scheme for synthetic aperture radar (SAR) which adapts the transmitted waveform spectrum to restore the quality of the scene range-profile based on the estimated interference spectrum. By expressing the estimation of the range-profile in the presence of correlated noise as a system identification problem, a cost function for the optimal waveform is derived. In order to respond effectively to changes in the radio frequency (RF) environment, adaptive waveform systems should perform waveform design on a small timescale, ideally on a pulse-to-pulse basis. Motivated by the need for a computationally efficient waveform design scheme, an alternative estimator is derived, which yields a closed form solution, which is shown to perform similarly to the optimal case. A series of test SAR images demonstrate the efficacy of this technique and are compared to the standard linearly frequency modulated signal and stretch processing outcome.

中文翻译：

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用于抑制 SAR 干扰的自适应波形设计

摘要 这项工作详细介绍了合成孔径雷达 (SAR) 的干扰减轻方案，该方案根据估计的干扰谱调整发射波形谱以恢复场景距离剖面的质量。通过将存在相关噪声的情况下的距离分布估计表示为系统识别问题，可以导出最优波形的成本函数。为了有效响应射频 (RF) 环境的变化，自适应波形系统应该在较小的时间尺度上执行波形设计，最好是在脉冲到脉冲的基础上。出于对计算效率高的波形设计方案的需求，推导出了一种替代估计器，它产生了一个封闭形式的解决方案，其表现类似于最佳情况。