说明：  使用步频信号生成距离像，包含变量频率步数，频率差，散射体数量，距离元，散射体移动速度，来生成散射体的距离像。
(Step-frequency signal generated using the range image that contains the variable frequency step, frequency difference, the number of scattering from the element, scattering body speed, to generate the scattering of Range.)