说明：  相控阵雷达数字去斜仿真，发射信号和回波信号，混频滤波信号，正交解调，滤波器设计 使用带通滤波器，二次时延；两个目标
(Phased array radar to ramp digital simulation, the transmitted signal and the echo signal, mixing the filtered signal, quadrature demodulation, filter design use a band-pass filter, the second delay two goals)