Estimation of single-trial event-related potential with cepstrum based method

Chun Qi, Hangyi Jiang, Dequn Liang

Research output: Contribution to journalConference article

Abstract

Event-related potential (ERP) plays a very important role in the field of human brain activities research. It is a practical method for measuring the brain functions. By now, the traditional methods remained in extracting of ERP are that rely on accumulative averaging techniques, which getting in a totally averaging result. In practice, however, it is obviously that the ERPs are not identical with each other in response for a number of repeated stimuli, neither in signal pattern nor response time. So that extracting ERP from a single trial is the goal of investigators in pursuit of. That is a difficult task, although some worthy works had been reported. A novel method is presented in this paper, which can extract single trial ERP by means of higher order cumulant (HOC) followed by cepstrum technique. Based on the theory of HOC, it can deal with additive noise very well, regardless the noise is white or not. For a single-trial ERP signal measured in strong background noise, the complex cepstrum of higher order cumulants of the signal is calculated firstly, and then the original ERP is reconstructed. The Experiment shows that this method has a better performance in reconstructing single-trial ERP in the case of lower signal to noise ratio.

Original languageEnglish (US)
Pages (from-to)201-208
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume3595
StatePublished - Jan 1 1999
Externally publishedYes
EventProceedings of the 1999 Biomedical Diagnostic, Guidance, and Surgical-Assist Systems - San Jose, CA, USA
Duration: Jan 26 1999Jan 27 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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