Embedded realisation of amplitude-phase adaptive filter for bio-potential signals

Dwaipayan Sardar, Debabrota Basu, Saugat Bhattacharyya, Amit Konar, Anwesha Khasnobish, D. N. Tibarewala, R. Janarthanan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Superposition of noise with the bio-potential signals causes plethoric information loss and misinterpretation in human-computer interference systems. Here, we have proposed a novel method to design a digital signal filter which is capable of filtering four major bio-potential signals viz. Electroencephalography (EEG), Electrooculography (EOG), Electrocardiography (ECG) and Electromyography (EMG). Different sampling frequencies for different bio-potential signals are manually selected through two select lines added as external inputs to the microcontroller based system. The filter has two sections in cascade, a conventional sixth order digital filter followed by an adaptive interference canceller (AIC). The AIC has a remarkable property of eliminating most of the interfering power line noise adaptively without consuming much time or space complexity of the embedded processor used. A variant of Least Mean Square (LMS) filtering algorithm called Amplitude-Phase Adaptive LMS (APALMS) is implemented here. Convergence behaviors of the adaptive parameters are simulated and finally verified on real time biopotential signals extracted from different subjects using low cost embedded processor. In this paper, we have found that our proposed filter transition frequencies are small with least variation in adaptation time.

Original languageEnglish
Title of host publicationInternational Conference on Control, Instrumentation, Energy and Communication, CIEC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages593-597
Number of pages5
ISBN (Electronic)9781479920440
DOIs
Publication statusPublished - 14 Nov 2014
Event2014 International Conference on Control, Instrumentation, Energy and Communication, CIEC 2014 - Kolkata, India
Duration: 31 Jan 20142 Feb 2014

Publication series

NameInternational Conference on Control, Instrumentation, Energy and Communication, CIEC 2014

Conference

Conference2014 International Conference on Control, Instrumentation, Energy and Communication, CIEC 2014
CountryIndia
CityKolkata
Period31/01/142/02/14

Keywords

  • Adaptive Interference Canceller
  • Bio-potential signals
  • Embedded processor
  • Human-computer Interfacing
  • Least Mean Square Filtering

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    Sardar, D., Basu, D., Bhattacharyya, S., Konar, A., Khasnobish, A., Tibarewala, D. N., & Janarthanan, R. (2014). Embedded realisation of amplitude-phase adaptive filter for bio-potential signals. In International Conference on Control, Instrumentation, Energy and Communication, CIEC 2014 (pp. 593-597). [6959158] (International Conference on Control, Instrumentation, Energy and Communication, CIEC 2014). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/CIEC.2014.6959158