Selective Time-Frequency Reassignment Based on Synchrosqueezing
Selective Time-Frequency Reassignment Based on Synchrosqueezing
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DOI：
10.1109/lsp.2015.2456097
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发表时间：
2015-07
影响因子：
3.9
通讯作者：
Alireza Ahrabian;D. Mandic
中科院分区：
文献类型：
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作者：
Alireza Ahrabian;D. Mandic
重分配方法旨在锐化传统时频算法的时频表示，如连续小波变换（CWT）。然而，这些方法的目的是定位噪声成分和感兴趣的信号成分，这使得低信噪比信号中这些成分的区分成为一项困难的任务。受模式恢复（RCM）算法的启发，我们提出了一种选择性时频重分配过程，该过程试图识别和定位连续小波变换（CWT）中感兴趣的振荡分量，其中重分配是为了选择性定位而进行的。该方法的性能在合成数据和实际数据上都得到了验证。
Reassignment methods seek to sharpen the time-frequency representation of conventional time-frequency algorithms, such as the continuous wavelet transform (CWT). However, such methods aim to localize both noise components and signal components of interest, which makes the discrimination between such components for low SNR signals a difficult task. Inspired by the recovery of modes (RCM) algorithm, we propose a selective time-frequency reassignment procedure that attempts to identify and localize oscillatory components of interest for the continuous wavelet transform (CWT), where the reassignment is carried out for selective localization. The performance of the proposed method is illustrated on both synthetic and real world data.