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一类性能优越的非线性时频分布

A Nonlinear Time-Frequency Distribution with Outstanding Performance
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摘要 时频分布旨在构造一种时间、频率的联合密度函数,以揭示信号所含的频率分量及其随时间的演化特性.构建一种新的时频核函数,推导其离散算法和参数的确定方法,和十几种主要的非线性时频分布对比仿真表明,该分布具有优秀的时域聚集性、频域聚集性和强的交叉项抑制能力. The aim of time-frequency distribution （TFD） is to find a joint density in time and frequency plane that indicates which frequency components are present in the signals and how they evolve with time. In this paper, a novel time frequency kernel function is presented, and its discrete algorithms and parameters are derived. Compared with dozens of nonlinear TFDs, this TFD is powerful in time-frequency resolu- tion and strong in cross-terms deletion.
作者 郭靖 刘光远
机构地区 西南大学电子信息工程学院
出处 《西南大学学报（自然科学版）》 CAS CSCD 北大核心 2014年第6期215-219,共5页 Journal of Southwest University(Natural Science Edition)
基金 国家自然科学基金资助项目(61205088) 中央高校基本科研业务费专项(XDJK2014C015) 西南大学博士基金资助项目(SWU112056)
关键词 时频分布 核函数 交叉项 时频分辨率 time-frequency distribution kernel function cross-term time-frequency resolution
分类号 TN911.7 [电子电信—通信与信息系统]
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参考文献17

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二级参考文献15

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共引文献1

西南大学学报（自然科学版）
2014年 第6期

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