System and method for acquisition of biopotential signals with motion artifact reduction in real time operation
A biopotential acquisition system technology, applied in the field of biopotential signal acquisition, to improve the real-time response of the system, reduce signal group delay, and reduce power consumption
Inactive Publication Date: 2015-08-12
INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW)
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A key technical challenge in these application settings is to overcome
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The invention relates to a biopotential signal acquisition system (100) comprising: an analogue readout unit (10) configured to receive an analogue biopotential signal (BS1) and to extract an analogue measured biopotential signal (BS2) and an analogue reference signal (REF); an ADC unit (20) configured to provide a digital version of the analogue measured biopotential signal (DBS2) and the analogue reference signal (DREF); a first digital filter unit (30) comprising a cascaded integrator-comb filter (32) configured to provide a first digital filtered version (DBS2', DREF') of the digital measured biopotential signal (DBS2) and the reference signal (DREF); and a second digital filter unit (40) configured to calculate a digital motion artifact estimate (MA) based on said first digital filtered version signals (DBS2', DREF'). The invention further relates to an electronic device and a method for acquisition of biopotential signals.
Description
technical field [0001] The present invention relates generally to the field of biopotential signal acquisition systems, and more particularly, to systems and methods for acquiring biopotential signals using digital adaptive filtering to reduce motion artifacts. Background technique [0002] Ambulatory monitoring of biopotential signals, such as electrocardiogram (ECG), electroencephalogram (EEG), electromyography (EMG), etc., is a highly relevant topic for personal medical care. A key technical challenge in these application settings is to overcome motion artifacts that severely affect the recorded biopotential signals. One approach to reducing motion artifacts utilizes digital adaptive filtering. For example, a known biomedical acquisition system with motion artifact reduction is disclosed in EP 2591720A1, which uses digital adaptive filtering (e.g. LMS filter) implemented in the digital domain to compute motion artifact estimates, which Motion artifact estimates are then...
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Login to view more IPC IPC(8): A61B5/0402A61B5/0476A61B5/0488
CPCA61B5/04012A61B5/7214A61B5/0476A61B5/04017A61B5/7207A61B5/0402A61B5/0488A61B5/316A61B5/318A61B5/369A61B5/389
Inventor H·金N·范海勒普特R·F·亚济乔鲁
Owner INTERUNIVERSITAIR MICRO ELECTRONICS CENT (IMEC VZW)
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