Research on LPI radar signal detection and parameter estimation technology

• 作者: WAN Tao JIANG Kaili LIAO Jingyi JIA Tingting TANG Bin
• 来源期刊: 系统工程与电子技术（英文版）
• 年，卷（期）: 2021,（3）
• 所属期刊栏目: DEFENCE ELECTRONICS TECHNOLOGY
• 页码范围: 566-572
• 页数: 7页
• 语种: 英文
• DOI: 10.23919/JSEE.2021.000048

摘要

Modern radar signals mostly use low probability of in-tercept(LPI)waveforms,which have short pulses in the time do-main,multicomponent properties,frequency hopping,com-bined modulation waveforms and other characteristics,making the detection and estimation of LPI radar signals extremely diffi-cult,and leading to highly required significant research on per-ception technology in the battlefield environment.This paper proposes a visibility graphs(VG)-based multicomponent signals detection method and a modulation waveforms parameter es-timation algorithm based on the time-frequency representation(TFR).On the one hand,the frequency domain VG is used to set the dynamic threshold for detecting the multicomponent LPI radar waveforms.On the other hand,the signal is projected into the time and frequency domains by the TFR method for estimat-ing its symbol width and instantaneous frequency(IF).Simula-tion performance shows that,compared with the most ad-vanced methods,the algorithm proposed in this paper has a valuable advantage.Meanwhile,the calculation cost of the al-gorithm is quite low,and it is achievable in the future battlefield.