摘要
时频分析在实际的非平稳信号处理中得到广泛的应用并仍然具有发展潜力。在时频分析中有两项重要的评价指标,即自项的集中程度和瞬时频率估计的准确性,介绍线性调频小波变换,多项式Chirplet变换和广义Warblet变换三种参数化时频分析方法,着重从此两项指标来阐述这三种方法的优缺点,进而分析和比较这三种方法的原理及应用范围。
In actual non-stationary signal processing, time-frequency analysis has been widely used in signal processing and still has development potential. There are two important evaluation indexes in the time-frequency analysis： its concentration and instantaneous frequency esti-mation accuracy, introduces Chirplet Transforms（CT）, Polynomial Chirplet Transform（PCT） and Generalized Warblet Transform（GWT）,these three parametric time-frequency analysis methods emphasis on the advantages and disadvantages from the above two indexes, and then analyzes and compares these three methods＇ principle and application scope.
