一种基于梳状滤波器原理的重频跟踪方法

面对现代电子战复杂的电磁环境以及不断涌现的新体制雷达，如何快速建立重频跟踪成为一个紧迫问题。利用雷达脉冲的相参性，提出了一种基于梳状滤波器原理的快速跟踪算法，利用重频信息产生梳状预测波门，对缓存的脉冲作同时匹配，解决了丢脉冲情况下的跟踪建立问题。为了将算法效能最优化，提出了一种双数字信号处理（DSP）＋现场可编程门阵列（FPGA ）的并行数据流硬件解决方案。实验结果表明该方法能极大地提高重频跟踪的成功率和降低虚警率。

A PRF Tracking Method Based on The Princple of Comb Filter

Facing to the complex electromagnetic environment and arising of new system radar in modern electronic warfare ,it becomes an urgent problem how to rapidly establish pulse repetition frequency (PRF) tracking .This paper uses the coherent characteristics of radar pulse to propose a rapidly tracking algorithm based on comb filter principle ,uses PRF information to generate comb prediction gate ,performs matching to buffered pulse ,w hich solves the problem to establish track-ing in the state that pulses are lost .For optimizing the algorithm efficiency ,a parallel data stream hardware solution project based on double digital signal processing (DSP)+ field programmable gate array (FPGA ) is proposed .T he experiment results show that the method can greatly improve the success rate of PRF tracking and reduce the false alarm probability .