基于时频峰值的激光打靶数字延时信号滤波算法设计  

Design of digital delay signal filtering algorithm for laser targeting based on time frequency peak

作　　者：介博[1] JIE Bo(Yangtze University College of Arts and Science,Jingzhou Hubei 424020,China)

机构地区：[1]长江大学文理学院,湖北荆州424020

出　　处：《激光杂志》2024年第10期245-249,共5页Laser Journal

基　　金：湖北省自然科学基金青年项目(No.2021CFB015)。

摘　　要：在激光打靶数字延时信号处理中,传统滤波算法往往难以有效滤除噪声干扰,导致信号失真。针对这一问题,设计了基于时频峰值的激光打靶数字延时信号滤波算法。计算激光打靶数字延时信号的信噪比,构建激光打靶数字延时信号波形方程式,以此分析激光打靶数字延时信号波形特征。采用时频峰值估计瞬时频率,求取时频峰值估计有效信号。根据时变窗标准方差划分置信区间,确定瞬时频率可信范围,抑制噪声干扰。通过能量和尺度变换设置两个滤波处理准则,以此完成数字延时信号滤波处理。实验结果表明,所设计算法的信号幅值波动的范围是[-10 dB~8 dB],与理想范围一致,具有精准滤波处理效果。In the digital delay signal processing of laser target shooting,it is often difficult for traditional filtering algorithms to effectively filter out noise interference,resulting in signal distortion.In order to solve this problem,this paper designs a digital delay signal filtering algorithm based on time-frequency peak.The signal-to-noise ratio of laser target digital delay signal is calculated,and the waveform equation of laser target digital delay signal is constructed to analyze the waveform characteristics of laser target digital delay signal.The instantaneous frequency is estimated by time-frequency peak,and the effective signal of time-frequency peak estimation is obtained.According to the standard variance of time-varying window,the confidence interval is divided,and the instantaneous frequency confidence range is determined to suppress noise interference.Two filtering criteria are set by energy and scale transformation,so as to complete the filtering of digital delay signal.The experimental results show that the range of signal amplitude fluctuation of the designed algorithm is[-10 dB~8 dB],which is consistent with the ideal range and has accurate filtering effect.

关 键 词：时频峰值 激光打靶 数字延时 信号滤波 

分 类 号：TN391[电子电信—物理电子学]