Stationarity index for abrupt changes detection in the time-frequency plane
Stationarity index for abrupt changes detection in the time-frequency plane
复制标题
时频平面突变检测的平稳性指标
DOI：
--
复制
发表时间：
1996
影响因子：
3.9
通讯作者：
C. Doncarli
中科院分区：
文献类型：
--
作者：
H. Laurent;C. Doncarli
提出了一种基于时频表示的非平稳噪声信号突变检测方法，定义了基于时频表示间距离测度的平稳性指标，并利用ROC曲线和统计特性对该方法的性能进行了比较。两组信号在这里专门研究：信号呈现非常短的段和非严格逐步平稳信号。对于这些信号，基于自回归（AR）谱估计的经典方法往往是不成功的。
This paper presents a new method based on time frequency representations (TFRs) for detecting abrupt changes in non-stationary noisy signals, Stationarity indices (SIs), based on different distance measures between TFRs, are defined and a comparison of the performances is performed using ROC curves and statistical properties. Two sets of signals are specially studied here: signals presenting very short segments and nonstrictly stepwise stationary signals. For these signals, classical methods based on autoregressive (AR) spectral estimators are often unsuccessful.