雷达训练模拟设计中的信号仿真方法研究

采用能够描述雷达信号相位和幅值信息的信号仿真方法,通过建立雷达接收处理机的数学模型,并给出各环节数值仿真算法,模拟实现雷达接收信号处理的全过程.结合地物杂波仿真和目标仿真得到雷达接收仿真信号;将仿真信号进行正交解调和脉冲压缩匹配滤波,使信噪比达到最大;利用动目标显示衰减信号地物杂波成分,采用动目标检测对仿真信号进行最佳滤波;最后利用恒虚警和判决进行目标检测.仿真得到结果与实际雷达处理信号波形一致,说明该方法逼真有效,可用于雷达模拟训练器系统的设计与实现.

Research on Signal Simulation Method of Radar Training Simulator Design

Using signal simulation method which can describe both the phase and amplitude,the models of the radar receiver and processor were constructed,and the numeric simulation algorithms were given,and then the signal receiving and processing experience was simulated credibly.The radar receiving simulative signal,which combined clutter signal with target signal,was proposed by quadrature demodulation and impulse compressed matched filter,so the SNR of the signal was maximized.Orderly,the clutter component of the simulative signal was weakened using MTI method,and the improvement factor was amplificatory using MTD optimally filter.Lastly,CFAR and adjudication methods were utilized to detect the target.The simulation result is consistent with the output signal of real radar,this proves that the simulation is realistic,and this method can be applied to the design and manufacture of radar simulator.