常规体制雷达交错脉冲列中的重频模式自动解析

Automatic Reconstruction of Regular Radar Pulse Repetition Patterns Based on Interleaved Pluse Train

对雷达侦察信号的重频模式进行自动准确解析是当前适应电子侦察大数据发展趋势和数据智能化处理需求的重要内容。频繁项扩展算法是针对固定、参差等常规重频体制雷达信号实施重频模式自动解析的有效方法,但直接的扩展过程并不能很好地满足对多辐射源交错脉冲列的处理需求。实际侦察接收机往往采用大带宽、宽方向性设计,因此多辐射源交错脉冲列在接收机中十分常见。本文针对雷达侦察交错脉冲列,在频繁项扩展方法的基础上,通过引入IS度量,提出新的重频模式解析过程的终止准则,在不实施分选的条件下解析出交错脉冲列中各辐射源的重频模式。仿真结果表明,该方法具有较强的抗漏脉冲、干扰脉冲能力和一定的辐射源数量适应能力,可以实现重频模式的有效解析。

Automatic and accurate pulse repetition pattern reconstruction of radar reconnaissance signals is an important content that is currently adapted to the development trend of electronic reconnaissance big data and the demand of data intelligent processing.Aimed at radar signals with fixed,stagger and other conventional pulse repetition intervals(PRI),frequent item extension algorithm is an effective method in automatic reconstruction of PRI patterns,however,which cannot perfectly meet the requirements for processing multi-emitters interleaved pulse trains.Due to the design of large bandwidth and wide directivity in reconnaissance receivers,interleaved pulse trains of multiple emitters are quite common in radar reconnaissance data.In order to reconstruct PRI pattern of each radar emitter in the interleaved pulse train without deinterleaving,this paper introduced the IS measure and presented a new termination criterion on the basis of the frequent item extension method.The simulation results showed that the method had strong ability of anti missing and interferential pulse and certain adaptability to the number of emitters,thus realizing the effective reconstruction of PRI pattern.