摘要
二次时频分布是分析非平稳信号的有力工具 ,在具有许多优良特性的同时 ,存在严重的交叉干扰项。在Wigner Ville分布及Cohen类时频分布具有固定核函数的基础上 ,研究了基于信号的核函数优化设计的两种方法 ,径向高斯核函数和最优相位核函数的设计方法。基于信号的核函数的时频表示可以有效地抑制或转移交叉分量 ,提高时频表示的可读估计 。
The quadratic time-frequency distributions are the useful analysis tools for nonstationary signals. There are many excellent performance, and at same time there are troublesome cross-components. Based on the Wigner-Ville distribution and Cohen's class time frequency representations with fixed kernel,The paper research the two optimal design methods of radially gaussian kernel and optimal phase kernel. The TFRs with signal-dependent kernel can suppress and translate the cross-components, improve the readability and main performances.
出处
《电波科学学报》
EI
CSCD
2003年第2期207-210,共4页
Chinese Journal of Radio Science
