连续目标双基地调频连续波 SAR 回波建模方法

在 SAR 成像仿真中，常使用离散的点目标集合来代替连续结构的目标进行回波建模。这种方法的一个 重要问题是所生成的目标回波依赖于点目标的采样方式，对同一个目标采用不同的离散采样方式可能产生具有显著差异的成像结果。该方法的另一个缺点是回波模型的精度与离散采样的间隔有关，小的离散间隔会导致巨大的计算量。为了解决上述问题，本文提出了一种新的连续目标回波建模方法，避免了离散采样方式和采样间隔的影响，并且大大降低了计算量。将该方法应用于调频连续波双基地合成孔径雷达系统研究，有助于理解其观测几何 与回波特性的关系。 

Continuous Target Bistatic FMCW SAR Echo Modeling Method

In the SAR imaging simulation, discrete point target sets are often used instead of continuous targets for echo modeling. An important problem of this method is that the target echo depends on the sampling method, and different sampling methods for the same target may produce significantly different imaging results. Another disadvantage is that the accuracy of the echo model is related to the sampling interval. The small sampling interval leads to a large amount of calculation. In order to solve the problems, this paper proposes a new continuous target echo modeling method, which avoids the influence of sampling method and sampling interval, and greatly reduces the calculation amount. The method is applied to the bistatic FMCW SAR system, which is helpful to understand the relationship between its observation geometry and echo characteristics.