Journal
IEEE SENSORS JOURNAL
Volume 7, Issue 7-8, Pages 1042-1043Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2007.895979
Keywords
double sideband; heartbeat; heterodyne; indirect-conversion; noncontact; portable; radar; remote sensing; respiration; sensor; telemedicine; vital sign
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A portable noncontact heartbeat and respiration monitoring system operating in 5-GHz band is reported in this letter. Compared with the previously reported system operating at Ka-band; this system has been simplified to include only two PCB antennas, a palm-size PCB radio module, a data acquisition module, and a laptop. The system, powered by the laptop battery through USB connection, is compact, low-cost, and convenient for field test. A detection accuracy of better than 80% has been achieved at a distance of 2.8 m and at a low transmitted power of 20 mu W. The system can be used for various applications in biology, medicine, and security.
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