计算机工程 ›› 2011, Vol. 37 ›› Issue (18): 81-83.doi: 10.3969/j.issn.1000-3428.2011.18.027

• 网络与通信 • 上一篇    下一篇

基于稳定分布噪声的分数低阶自适应时频分布

龙俊波 a,汪海滨 b,查代奉 a   

  1. (九江学院 a. 电子工程学院;b. 信息科学与技术学院,江西 九江 332005)
  • 收稿日期:2011-02-10 出版日期:2011-09-20 发布日期:2011-09-20
  • 作者简介:龙俊波(1979-),男,讲师、硕士,主研方向:分数低阶信号处理;汪海滨,讲师、硕士;查代奉,副教授、博士
  • 基金项目:
    国家自然科学基金资助项目(60772037);江西省卫生厅科技计划基金资助项目(20092076);江西省自然科学基金资助项目(2009GES0068);江西省教育厅科技基金资助项目(GJJ10266)

Fractional Low-order Adaptive Time-frequency Distribution Based on Stable Distribution Noise

LONG Jun-bo a, WANG Hai-bin b, ZHA Dai-feng a   

  1. (a. College of Electronic and Engineering; b. College of Information Science and Technology, Jiujiang University, Jiujiang 332005, China)
  • Received:2011-02-10 Online:2011-09-20 Published:2011-09-20

摘要: 信号中的α稳定分布噪声会使自适应时频分布方法失效。针对该问题,利用分数低阶统计量理论,提出一种改进的分数低阶自适应时频分布。为了实现带噪信号的实时在线处理及长时间信号的时频分布分析,给出一种分数低阶短时自适应时频分布。仿真结果表明,2种方法都能在含有α稳定分布噪声和高斯噪声的环境下进行有效的时频分布分析。

关键词: 自适应时频分布, 分数低阶模糊函数, α稳定分布, 最优核函数, 分数低阶短时自

Abstract: In order to solve the problem that adaptive time-frequency distribution method is invalid in α stable distribution noise environment, this paper proposes an improved Fractional Low-order Adaptive Time-frequency Distribution(FLO-ATFD). And it proposes Fractional Low-order Short Time Adaptive Time-frequency Distribution(FLO-STATFD) to analyze time-frequency distribution of long-time signals and process signals on-line in α stable distribution noise environment. Simulation results indicate that two methods perform effective time-frequency distribution analysis in α stable distribution noise and Gaussian distribution noise environment.

Key words: adaptive time-frequency distribution, fractional low-order ambiguity function, α stable distribution, optimal kernel function, Fractional Low-order Short Time Adaptive Time-frequency Distribution(FLO-STATFD)

中图分类号: