计算机应用 ›› 2011, Vol. 31 ›› Issue (09): 2333-2335.DOI: 10.3724/SP.J.1087.2011.02333

• 网络与通信 • 上一篇    下一篇

基于窗函数设计的跳频信号时频分析

郭建涛1,刘友安2,王林1   

  1. 1. 信阳师范学院 物理电子工程学院, 河南 信阳 464000
    2. 信阳供电公司,河南 信阳 464000
  • 收稿日期:2011-03-14 修回日期:2011-04-28 发布日期:2011-09-01 出版日期:2011-09-01
  • 通讯作者: 郭建涛
  • 作者简介:郭建涛(1973-),男,河南南阳人,副教授,博士,主要研究方向:通信信号处理、时频分析;
    刘友安(1970-),男,河南信阳人,高级工程师,硕士,主要研究方向:音视频信号处理;
    王林(1962-),男,河南信阳人,副教授,主要研究方向:光学图像处理。
  • 基金资助:
    河南省教育厅自然基金资助项目(2011A510021);信阳师范学院高层次人才科研基金资助项目(09217)

Time-frequency analysis of frequency-hopping signals based on window function design

GUO Jian-tao1,LIU You-an2,WANG Lin1   

  1. 1. College of Physics and Electronic Engineering, Xinyang Normal University, Xinyang Henan 464000, China
    2. Xinyang Power Supply Company, Xinyang Henan 464000, China
  • Received:2011-03-14 Revised:2011-04-28 Online:2011-09-01 Published:2011-09-01
  • Contact: GUO Jian-tao

摘要: 基于抑制交叉项,提高信号分量时频聚集性的考虑,提出一种基于可调窗函数进行平滑伪维格纳分布核函数设计的时频分析方法:在保持平滑伪维格纳分布中核函数宽度不变的情况下,根据核函数自项和互项能量分布比,通过调整窗函数中的扩展因子改变核函数形状,获取跳频信号优良的时频表示。与固定窗函数方法相比,应用该时频表示,可以有效估计跳频信号的时频参数,而且有很好的抗噪声干扰能力。

关键词: 跳频信号, 时频分析, 窗函数, 参数估计, 模糊函数

Abstract: To suppress the cross-term and increase aggregation of time-frequency signal components, a new time-frequency analysis method for frequency-hopping signals was proposed based on adjusted window for kernel function design of Smoothed Pseudo Wigner Ville Distribution (SPWVD). According to the auto-term energy and cross-term energy ratios in the time-frequency plane, the shape of kernel function of SPWVD was adjusted through changing spread factors of window function to obtain excellent time frequency representation in fixed-kernel width. Compared with the fixed window function, using the proposed time frequency representation, time frequency parameters of frequency hopping signals can be estimated efficiently and good noise immunity can be got.

Key words: frequency-hopping signal, time-frequency analysis, window function, parameter estimation, ambiguity function

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