SAR成像仿真，设定场景参数，目标参数和信号参数后对应两种不同分辨率完成正交解调接收方式仿真SAR回波信号，观察信号的时、频域波形。-SAR imaging simulation, set the scene parameters, target parameters and signal parameters corresponding to the two different resolutions to complete the quadrature demodulator receive