脉冲无源双基地雷达对海探测若干问题研究

Passive pulse bistatic radar is a passive system based on non-cooperative pulse radar illuminators, which has double-channel and/or multi-channel to process direct path signal from one and/or several non-cooperative transmitters and scattering signal of targets to locate and track the targets. Due to the radar system has the advantages of low cost and ability to survive, the research on issues of sea target detection of passive bistaic pulse radar will have important military significance and good application prospect. The project is the follow-up study of the early national natural science youth fund project. On the base of the study of the working principle of passive pulse bistatic radar detection, as well as the key technologies of system synchronization, direct wave complex envelope estimation and passive coherent detection, several practical special issues of sea target detection of the system will be further researched. Main contents include the signal analysis and optimal selection of radar illuminators from the sea, the analysis of the transmitter antenna pattern modulation impact, the direct wave pulse loss and phase change impact, the bistatic clutter characteristics, the methods of sea clutter suppression, as well as passive pulse bistatic radar detection experimental research, which are expected to lay a foundation for further development of practical systems.

脉冲无源双基地雷达是基于非合作脉冲雷达辐射源的无源探测系统，其利用两个或多个接收通道处理来自一个或多个非合作发射台的直达波和目标散射信号，以实现目标的定位与跟踪。该体制雷达具有成本低廉、生存能力强等优点，因此，针对典型的海战场应用环境开展脉冲无源双基地雷达对海探测的实际问题研究，具有重要的军事意义和良好的应用前景。 本项目为前期国家自然科学青年基金项目的后续研究，在脉冲无源双基地雷达探测工作机理，以及系统同步、直达波复包络估计、无源相干检测等关键技术的研究基础上，后续将紧密围绕脉冲无源双基地雷达系统对海探测所面临的若干实际特殊问题展开深入研究，主要内容包括海上非合作雷达源的信号分析与优化选择、海上非合作雷达源天线扫描影响分析、直达波脉冲丢失与相位突变影响分析、双基地杂波特性与海杂波抑制方法，以及脉冲无源双基地雷达对海探测试验研究等方面，为将来的系统实用化奠定基础。

脉冲无源双基地雷达是基于非合作脉冲雷达辐射源的无源探测系统，其利用两个或多个接收通道处理来自一个或多个非合作发射台的直达波和目标散射信号，以实现目标的定位与跟踪。该体制雷达具有成本低廉、生存能力强等优点，在未来战场中将发挥重要作用。本项目在脉冲无源双基地雷达探测工作机理，以及系统同步、直达波复包络估计、无源相干检测等关键技术的研究基础上，紧密围绕脉冲无源双基地雷达系统对海探测所面临的若干实际特殊问题展开深入研究。完成了海上非合作雷达源的信号分析与优化选择、海上非合作雷达源天线扫描影响分析、直达波脉冲丢失与相位突变影响分析、双基地杂波特性与海杂波抑制方法等研究，开展了外场对海探测试验，获得了十分清晰的PBR雷达画面，试验成功探测到进出港口的航道内船只。在直达波脉冲丢失与相位突变补偿、双基地海杂波下的MTI、杂波图及CFAR处理等关键技术上取得了突破。授权国家发明专利10项，软件著作权2项，在国内外重要刊物和学术会议上发表论文25篇，其中SCI检索3篇，EI/ISTP检索17篇，获军队科技进步一等奖1项。