An improved method to calculate phase locking value based on hilbert-huang transform and its application

  • Authors:

  • Zhang Jin;Wang Na;Kuang Huan;Wang Ru-long

  • Affiliations:

  • School of Software, Hunan University, Changsha, China;Computer and Information Engineering College, Inner Mongolia Normal University, Hohhot, China;School of Software, Hunan University, Changsha, China;School of Software, Hunan University, Changsha, China

  • Venue:
  • ICONIP'12 Proceedings of the 19th international conference on Neural Information Processing - Volume Part II
  • Year:
  • 2012

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Abstract

Addressing the problems existing in traditional phase locking value (PLV) calculating method, an improved method based on Hilbert-Huang transform (HHT) is proposed and applied onto a group of hypoxia EEG in this paper. Improved method preprocesses EEG data by ocular artifact elimination and spatial filtering firstly. Then, EEG sub-components withinα frequency band (8-12Hz) are obtained through empirical mode decomposition (EMD) of HHT and chosen as our research object. Finally, Hilbert transform (HT) is applied onto the target EEG sub-components and PLVs among different channels of EEG records are calculated according to the transform result. According to extracted PLVs used as features, normal and hypoxia EEG recorded from 3 subjects can be distinguished effectively. Primarily analysis shows that improved method has potential to be used widely to analyze EEG.