系统工程与电子技术 ›› 2025, Vol. 47 ›› Issue (5): 1461-1468.doi: 10.12305/j.issn.1001-506X.2025.05.09

• 传感器与信号处理 • 上一篇    

多维参数谱重构的FDA-MIMO雷达超分辨目标定位方法

孟祥天1, 经哲涵2, 曹丙霞1,*, 沙明辉3, 朱应申3, 闫锋刚1   

  1. 1. 哈尔滨工业大学(威海)信息科学与工程学院, 山东 威海 264209
    2. 哈尔滨工业大学电子与信息工程学院, 黑龙江 哈尔滨 150001
    3. 北京无线电测量研究所, 北京 100854
  • 收稿日期:2024-03-15 出版日期:2025-06-11 发布日期:2025-06-18
  • 通讯作者: 曹丙霞
  • 作者简介:孟祥天 (1994—), 男, 讲师, 博士, 主要研究方向为阵列信号处理、反辐射制导
    经哲涵 (2000—), 男, 博士研究生, 主要研究方向为阵列信号处理
    曹丙霞 (1980—), 女, 副教授, 博士, 主要研究方向为阵列信号处理、极化雷达
    沙明辉 (1986—), 男, 研究员, 博士, 主要研究方向为雷达系统设计、雷达波形优化
    朱应申 (1985—), 男, 高级工程师, 硕士, 主要研究方向为电子对抗、技术侦察
    闫锋刚 (1982—), 男, 教授, 博士, 主要研究方向为雷达信号处理、电子对抗
  • 基金资助:
    国家自然科学基金(62171150);泰山学者工程专项经费(TSQN202211087);山东省自然科学基金(ZR2023MF091);航空科学基金(2023Z037077002)

Super-resolution target localization method based on multi-dimensional parameter spectrum reconstruction of FDA-MIMO radar

Xiangtian MENG1, Zhehan JING2, Bingxia CAO1,*, Minghui SHA3, Yingshen ZHU3, Fenggang YAN1   

  1. 1. School of Information Science and Engineering, Harbin Institute of Technology (Weihai), Weihai 264209, China
    2. School of Electronics and Information Engineering, Harbin Institute of Technology, Harbin 150001, China
    3. Beijing Institute of Radio Measurement, Beijing 100854, China
  • Received:2024-03-15 Online:2025-06-11 Published:2025-06-18
  • Contact: Bingxia CAO

摘要:

针对频控阵多输入多输出(frequency diverse array multiple-input multiple-output, FDA-MIMO)雷达在目标定位过程中存在的角度和距离耦合问题,提出两种低复杂度角度-距离超分辨估计算法,即二维求根(two-dimensional rooting, 2D-root)算法和重构旋转不变子空间(reduced dimensional estimation of signal parameters via rotational invariance techniques, RD-ESPRIT)算法。首先,提出角度-距离二维谱重构方法,将二维参数谱进行一维化等价剥离。区别于传统求根超分辨算法,2D-root算法利用矩阵化子空间求根方法,构造双重求根多项式, 分别对角度和距离进行高精度估计及参数自动配对。同时,为了进一步减少求根运算的计算量,RD-ESPRIT算法利用重构后角度谱内在的线性关系,获得信号子空间的旋转不变性,从而实现目标角度的高效求解。计算机仿真实验结果表明,所提两种算法在降低传统搜索类目标定位算法复杂度的基础上,可提高参数估计精度。

关键词: 频控阵多输入多输出雷达, 超分辨, 谱重构, 解耦合

Abstract:

Two low-complexity angle-distance super-resolution estimation algorithms are proposed to solve coupling problem of angle and distance in the target localization process of frequency division array multiple-input multiple-output (FDA-MIMO) radar, which are namely the two-dimensional rooting (2D-root) algorithm and the reduced dimensional estimation of signal parameters via rotational invariance techniques (RD-ESPRIT) algorithm. Firstly, an angle-distance two-dimensional spectral reconstruction method is proposed to perform one-dimensional equivalent stripping of the two-dimensional parameter spectrum. Differ from traditional rooting super-resolution algorithms, the 2D-root algorithm utilizes a matrix subspace rooting method to construct dual rooting polynomials for high-precision estimation of angles and distances, and automatically pairs the parameters. Meanwhile, in order to further reduce the computational complexity of rooting computation, the RD-ESPRIT algorithm utilizes the linear relationship inherent in the reconstructed angle spectrum to obtain rotational invariance of the signal subspace, thereby achieving efficient solution of the target angle. Computer simulation experimental results show that the two proposed algorithms can improve parameter estimation accuracy while reducing the complexity of traditional search-based target localization algorithms.

Key words: frequency diverse array multiple-input multiple-output (FDA-MIMO) radar, super resolution, spectrum reconstruction, decoupling

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