系统工程与电子技术 ›› 2026, Vol. 48 ›› Issue (11): 3823-3835.doi: 10.12305/j.issn.1001-506X.2026.11.14

• 传感器与信号处理 • 上一篇    下一篇

二维捷变信号波形优化与多目标探测

邓瀚杨1(), 张磊1(), 魏少鹏2(), 周钦全1()   

  1. 1. 中山大学电子与通信工程学院,广东 深圳 518107
    2. 中国石油大学(华东)海洋与空间信息学院,山东 青岛 266580
  • 收稿日期:2025-06-26 修回日期:2025-10-22 接受日期:2025-11-04 出版日期:2026-10-25 发布日期:2026-04-14
  • 通讯作者: 张磊 E-mail:denghy39@mail2.sysu.edu.cn;zhanglei57@mail.sysu.edu.cn;20220066@upc.edu.cn;zhouqq25@mail2.sysu.edu.cn
  • 作者简介:邓瀚杨(2002—),男,硕士研究生,主要研究方向为合成孔径雷达成像、信号处理
    魏少鹏(1993—),男,副教授,博士,主要研究方向为雷达成像、雷达干扰对抗、雷达信号处理
    周钦全(2000—),男,博士研究生,主要研究方向为多站协同目标跟踪测量一体化

Optimization of two-dimensional agile signal waveform and multi-target detection

Hanyang Deng1(), Lei Zhang1(), Shaopeng Wei2(), Qinquan Zhou1()   

  1. 1. School of Electronics and Communication Engineering,Sun Yat-sen Univisity,Shenzhen 518107,China
    2. College of Oceanography and Space Informatics,China University of Petroleum (East China),Qingdao 266580,China
  • Received:2025-06-26 Revised:2025-10-22 Accepted:2025-11-04 Online:2026-10-25 Published:2026-04-14
  • Contact: Lei Zhang E-mail:denghy39@mail2.sysu.edu.cn;zhanglei57@mail.sysu.edu.cn;20220066@upc.edu.cn;zhouqq25@mail2.sysu.edu.cn

摘要:

传统雷达波形因其时频周期性特征易被侦察系统截获干扰,为降低传统波形截获概率并提升抗干扰能力而采用联合载频与脉冲重复频率捷变技术,会产生距离维与多普勒维高旁瓣效应并导致目标参数估计困难。对此,面向二维捷变的稀疏步进线性调频波形,构建基于联合载频−脉冲重复频率捷变的波形优化与极大似然估计融合框架。通过建立捷变波形在距离维和多普勒维的自相关数学模型,推导出基于载频与脉冲重复频率联合优化的旁瓣抑制准则。在此基础上,设计基于极大似然估计的运动参数估计方法,利用低多普勒旁瓣脉冲序列实现多个目标径向速度的精确提取。仿真结果表明,所提方法相比传统稀疏步进线性调频信号提高抗干扰能力的同时能进行较高精度的参数估计,具有可靠性和有效性。

关键词: 联合载频与脉冲重复频率捷变, 低旁瓣, 波形设计, 极大似然估计

Abstract:

Traditional radar waveforms, due to their periodic time-frequency characteristics, are easily intercepted and jammed by surveillance systems. High sidelobe effects in the range-Doppler plane caused by joint carrier frequency and pulse repetition frequency (PRF) agile techniques makes target parameter estimation difficult. To address this problem, a waveform optimization and maximum likelihood estimation fusion framework is proposed based on joint carrier frequency-PRF agility for two-dimensional agile sparse step linear frequency modulation waveforms (SSLFMW). By establishing autocorrelation mathematical models of agile waveforms in distance and Doppler dimensions, a sidelobe suppression criterion based on joint optimization of carrier frequency and PRF is derived. On this basis, a motion parameter estimation method based on maximum likelihood estimation is designed to achieve accurate extraction of radial velocities of multiple targets using low Doppler sidelobe pulse sequences. The simulation results show that the proposed method improves anti-interference ability and can perform high-precision parameter estimation compared to traditional linear frequency modulation signals, having reliability and effectiveness.

Key words: joint carrier frequency and pulse repetition frequency agility, low sidelobe, waveform design, maximum likelihood estimation

中图分类号: