Title :
Design and Implementation of A PC-Based Digital Synchronous Detection System for Biological Signal Measurement
Author :
Gan, K.B. ; Zahedi, E. ; Ali, M. A Mohd
Author_Institution :
Univ. Kebangsaan Malaysia, Bangi
Abstract :
A PC-based digital lock-in amplifier was implemented completely in software (Labview) for photoplethysmograph (PPG) measurement. Experiments carried out to evaluate the performance of the amplifier show that the system can recover the signals up to 40 dB below the interference (ambient light). This system can be customized later to measure the trans-abdominal PPG signal of pregnant women for fetal heart rate detection.
Keywords :
amplifiers; cardiology; medical signal detection; obstetrics; plethysmography; virtual instrumentation; Labview; PC-based digital synchronous detection system; biological signal measurement; digital lock-in amplifier; fetal heart rate detection; photoplethysmograph measurement; pregnant women; Frequency; Gallium nitride; Interference; Low-frequency noise; Noise level; Optical amplifiers; Optical noise; Phase noise; Signal design; Software measurement; Digital lock-in amplifier; photoplethysmography; virtual instrument;
Conference_Titel :
Research and Development, 2007. SCOReD 2007. 5th Student Conference on
Conference_Location :
Selangor, Malaysia
Print_ISBN :
978-1-4244-1469-7
Electronic_ISBN :
978-1-4244-1470-3
DOI :
10.1109/SCORED.2007.4451391
