时空过采样探测系统性能仿真

基于星载扫描辐射计的工作原理，对传统的线列扫描成像系统和过采样系统的采样过程进行了数学建模和仿真成像，在两种采样模式下对点目标探测进行了仿真。在Matlab环境下对过采样探测系统进行了仿真图像的沿线阵方向的两倍空间过采样和扫描方向上（即时间上）的2~10倍的过采样仿真。通过对过采样探测系统各种工况下的仿真，得到了图像中信号能量值和目标尺寸大小的关系，分析了目标位置的不同对成像质量造成的影响。最后给出了不同大小目标两个通道上的四倍过采样图像，并分析了图像中存在的跨像元现象。

Performance simulation of temporal-spatial oversampling system

Based on the working principle of the satellite borne scanning imaging system, we expound traditional line scan and oversampling detection. The mathematical modeling and simulation imaging of the point target detection in two detection modes are presented. The oversampling system oversamples the image twice along the line direction while 2 to 10 times along the scanning direction(i.e. the time direction) with Matlab. The signal is analyzed by routinely scanning and oversampling the spot targets. The relationship between the power of the signal and the sizes, and the imaging effects brought by different locations of targets are given. At last, we obtain 4X oversampling images of different targets through two channels and analyze the multi-pixel phenomenon existing in the images.