合成孔径雷达（SAR)目标成像仿真，主要为数据分析和统计，采用波束成形技术的BER计算，基于SVPWM的三电平逆变的matlab仿真，包含位置式PID算法、积分分离式PID，对HARQ系统的吞吐量分析。-Synthetic Aperture Radar (SAR) imaging simulation target, Mainly for data analysis and statistics, By applying the beam forming technology of BER Based on SVPWM three-level inverter matlab simulation, It contains positional PID algorithm, integral separate PID, HARQ throughput analysis of the system.