基于FPGA的雷达天线方位角信号的模拟系统

为满足天线离线状态下的雷达测试需求，设计开发一种基于 FPGA 的雷达天线方位角信号的模拟系统。雷达天线方位角信号的模拟对雷达信号处理机性能的测试显得尤为重要，设计以伺服控制输出的 PWM信号、电机转动方向控制信号和制动信号作为输入参数，计算出雷达天线的方位角位置，并转换为光电编码传感器的脉冲信号输出给雷达信号处理机。该模拟系统具有输入输出信号属性与雷达天线单元一致、易实现等优点，并已应用于某型雷达测试系统，实践证明效果良好。

Signal simulation system of radar antenna azimuth based on FPGA

In order to meet the need of radar testing in the state of antenna being off line, a signal simulation system of radar antenna azimuth based on FPGA is designed. The signal simulation of radar antenna azimuth is very important for the test of radar signal processor. The PWM signal,direction control signal and braking signal of motor given by servo control system are used to compute the azimuth position of radar antenna which is processed to be simulating pulses of optical encoder sensor and outputed to radar signal processor. The simulation system has such advantages as that the attributes of input/output signal are in line with those of radar antenna and the method is simple to implement, which has been applied to the radar testing system of a certain type. Practice proves that the effect is good.