北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (1): 220-228.doi: 10.13700/j.bh.1001-5965.2019.0185

• 论文 • 上一篇    下一篇

毫米波调频引信的优化二维FFT信号处理算法

郭晨曦, 郝新红, 栗苹, 李国林, 贾瑞丽   

  1. 北京理工大学 机电工程与国家控制重点实验室, 北京 100081
  • 收稿日期:2019-04-23 发布日期:2020-01-21
  • 通讯作者: 郝新红 E-mail:haoxinhong@bit.edu.cn
  • 作者简介:郭晨曦,男,硕士研究生。主要研究方向:引信信号处理技术;郝新红,女,博士,副教授,博士生导师。主要研究方向:中近程探测及控制技术、引信抗干扰技术;栗苹,女,博士,教授,博士生导师。主要研究方向:信息感知与对抗、智能探测与控制技术;李国林,男,博士,教授,博士生导师。主要研究方向:信息感知与对抗。贾瑞丽,女,高级工程师。主要研究方向:信息感知与对抗。
  • 基金资助:
    国家自然科学基金(61871414);装备预研领域基金(61406190101)

Optimized two-dimensional FFT signal processing algorithm for millimeter-wave FM fuze

GUO Chenxi, HAO Xinhong, LI Ping, LI Guolin, JIA Ruili   

  1. Science and Technology on Electromechanical Dynamic Control Laboratory, Beijing Institute of Technology, Beijing 100081, China
  • Received:2019-04-23 Published:2020-01-21
  • Supported by:
    National Natural Science Foundation of China (61871414); Equipment Pre-research Foundation of China (61406190101)

摘要: 针对毫米波调频引信对目标距离速度信息联合估计的问题,提出一种基于相对距离评价函数优化的二维快速傅里叶变换(FFT)信号处理算法。首先,通过分析二维FFT算法实际测距测速精度与FFT点数的关系,建立了优化数学模型,利用相对距离评价函数对数学模型求解,得到FFT点数最优解;然后,采样将差频信号数据转换成二维数据矩阵,分别对矩阵的行列进行相应FFT变换;最后,通过提取峰值点的坐标估计目标的距离速度信息。结果表明:该算法有效提高了传统二维FFT算法的测距测速精度,并且满足实时性要求,能够同时提取毫米波调频引信的目标距离速度信息。

关键词: 毫米波调频引信, 相对距离评价函数, 二维FFT, 距离速度联合估计, 信号处理算法

Abstract: In this paper, a two-dimensional fast Fourier transform(FFT) signal processing algorithm based on relative distance evaluation function optimization is proposed for the joint estimation of target range and velocity information of millimeter-wave frequency modulated fuze. The relationship between the accuracy of the actual ranging and velocity measurement and the number of FFT points is analyzed first. Then an optimization mathematical model is established. The mathematical model is solved by utilizing relative distance evaluation function. After obtaining the optimal solution of the number of FFT points, the beat frequency signal is sampled into two-dimensional data matrix. The corresponding FFT transformation on the rows and columns of the matrix is performed respectively. Finally, the target range and velocity information is estimated by extracting the coordinates of the peak points. The simulation and discussion analysis demonstrate that the proposed algorithm can effectively improve the accuracy of the actual ranging and velocity measurement of the traditional two-dimensional FFT algorithm and meet the real-time requirements. The algorithm can extract the target range and velocity information of millimeter-wave frequency modulated fuze simultaneously.

Key words: millimeter-wave frequency modulated fuze, relative distance evaluation function, two-dimensional FFT, range and velocity joint estimation, signal processing algorithm

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