针对传统的被动雷达导引头信号处理系统在预测宽波门中会存在异部雷达信号的不足,研究了载频、相位差等参数,通过在FPGA中构造的相位累加器与控制逻辑进行实时的预测相位差的变化趋势,给出了相位差的剔除门限和精确的跟踪窄波门,由于采用FPGA设计节省了DSP的资源,减少了系统的复杂性,提高了系统的跟踪精度,在实际的应用中取得了良好效果。

Aiming at the deficiency that the forecasting wide gate has another radar signal in the traditional passive radar seeker signal processing system, phase shift and carrier frequency were researched. The trend of the phase shift was well predicted by making a phase accumulator and a logic controller in FPGA, and then the phase threshold and precise narrow gate were proposed. Since the design was based on FPGA, a lot of DSP resources were saved, the system complexity was reduced, the tracing precision was improved, and good effect was achieved in practical application.