电子侦察脉冲列中重频信息提取与应用综述

Extraction and application of pulse repetition frequency information in radar pulse trains: a survey

摘要:

脉冲重复间隔（PRI）或脉冲重复频率（PRF）是雷达辐射源最稳健的特征参数之一，体现了雷达辐射脉冲的时序规律。在功能上，重频既决定了雷达单值测距范围,又影响不模糊测速区域大小。现代雷达常采用多个重频值和多种调制类型以满足不同功能的需求。在非合作机制的电子侦察领域，PRI指2个连续脉冲上升沿的间隔，是重要的脉冲描述字（PDWs）之一。由PRI衍生的雷达重频信息包括典型重频值集、重频调制类型、重频参数时序模式，均需要从复杂的电子侦察脉冲列中提取之后才能应用至分选、识别等数据处理任务。从电子侦察系统中重频信息提取与应用的体制与技术难点出发，综述了3种重频信息提取与应用的研究现状，并对重频信息提取与应用的进一步发展做出了展望。

Abstract:

Pulse repetition interval (PRI) or pulse repetition frequency (PRF) is one of the most robust parameters of radars, reflecting the temporal pattern of radar pulses.In terms of functionality, PRI not only determines the distance of radar single value ranging, but also affects the size of the non-ambiguous area of speed measurement. Modern radar often uses multiple PRI values and multiple PRI modulation types to meet the requirements of different functions. In the field of non-cooperative electronic reconnaissance, PRI refers to the interval between the rising edges of two consecutive pulses, which is one of important pulse description words (PDWs). PRI information includes typical PRI value sets, PRI modulation types, the PRI pattern, which need to be extracted from complex radar pulse trains before being applied to data processing tasks such as deinterleaving and recognition. This article starts from the system and technical difficulties of extracting and applying PRI information in electronic reconnaissance systems, surveys the research status of three PRI information extraction and application, and makes prospects for further development of PRI information extraction and application.