High-resolution portable bluetooth module for ECG and EMG acquisition

Luiz, Luiz E.; Soares, Salviano; Valente, Antonio; Barroso, João; Leitão, Paulo; Teixeira, João Paulo

http://hdl.handle.net/10198/34654

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Abstract(s)

Portable ECG/sEMG acquisition systems for telemedicine often lack application flexibility (e.g., limited configurability, signal validation) and efficient wireless data handling. A modular biosignal acquisition system with up to 8 channels, 24-bit resolution and configurable sampling (1–4 kHz) is proposed, featuring per-channel gain/source adjustments, internal MUX-based reference drive, and visual electrode integrity monitoring; Bluetooth® transmits data via a bit-wise packet structure (83.92% smaller than JSON, 7.28 times faster decoding with linear complexity based on input size). Results: maximum 6.7 μVrms input-referred noise; harmonic signal correlations >99.99%, worst-case THD of -53.03 dBc, and pulse wave correlation >99.68% in frequency-domain with maximum NMSE% of 6e-6%; and 22.3-hour operation (3.3 Ah battery @ 150 mA). The system enables high-fidelity, power-efficient acquisition with validated signal integrity and adaptable multi-channel acquisition, addressing gaps in portable biosensing.

Keywords

Electrocardiogram Electromyogram Printed circuit board Acquisition integrity Telemedicine Wearable Human-centred

URI

http://hdl.handle.net/10198/34654

Citation

Luiz, Luiz E.; Soares, Salviano; Valente, Antonio; Barroso, João; Leitão, Paulo; Teixeira, João Paulo (2025). High-resolution portable bluetooth module for ECG and EMG acquisition. Computational and Structural Biotechnology Journal. ISSN 2001-0370. 28, p. 156-166