Wireless biopotential signals acquisition system

Author

Cilleruelo, Esteban ; Nacelle, Andres ; Robert, Grepl ; Oreggioni, Julian ; Silveira, F. ; Caputi, Angel

Author_Institution

Inst. de Ing. Electr. Fac. de Ing., Univ. de la Republica, Montevideo, Uruguay

fYear

2013

Firstpage

1

Lastpage

5

Abstract

In this paper, we present a low power wireless system based on a MSP430 based system-on-chip for biopotential signals acquisition. The system is capable of recording up to 12 ksps from up to 4 channels with independent gain and a 1 Hz to 5 kHz bandwidth. The gain for each channel may vary from 2.5 kV/V to 68 kV/V, being able to adapt signals in a range of 20 μV to 1 mV, to be digitalized in a 12 bits ADC. The system consists of 2 modules, which communicate wirelessly with each other via a 915 MHz link, with Minimum-shift keying (MSK) modulation. The communication reaches 358 kbps of transmission rate, with less than 2% of packets lost without retransmissions, within a 5 meters range. One of the modules is wired to a PC via a USB cable, reaching 921.6 kbps of transmission rate through UART protocol. The wired module is powered through the USB port, whereas the wireless module is powered with 2 AAA batteries, lasting for more than 24 hours of operation. A Matlab toolbox was developed in order to facilitate the data storage, system configuration as well as collected data analysis.

Keywords

analogue-digital conversion; bioelectric potentials; biomedical communication; biomedical electronics; computer interfaces; minimum shift keying; radiocommunication; system-on-chip; ADC; MSP430 based system-on-chip; UART protocol; USB cable; USB port; bit rate 358 kbit/s; bit rate 921.6 kbit/s; distance 5 m; frequency 915 MHz; low power wireless system; minimum shift keying modulation; wired module; wireless biopotential signals acquisition system; Bandwidth; Batteries; Flowcharts; Graphical user interfaces; Microprogramming; System-on-chip; Wireless communication; Biopotential signals acquisition; Low power wireless data transmission; MSP430 system-on-chip;

fLanguage

English

Publisher

ieee

Conference_Titel

Embedded Systems (SASE/CASE), 2013 Fourth Argentine Symposium and Conference on

Conference_Location

Buenos Aires

Print_ISBN

978-1-4799-1098-4

Type

conf

DOI

10.1109/SASE-CASE.2013.6636771

Filename

6636771