Title :
Automatic clutter-canceler for microwave life-detection systems
Author :
Chuang, Huey-Ru ; Chen, Kun-Mu ; Kun-Mu Chen
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
Abstract :
A microprocessor-controlled automatic clutter-cancellation subsystem, consisting of a programmable microwave attenuator and a programmable microwave phase-shifter controlled by a microprocessor-based control unit, has been developed for a microwave life-detection system (L-band 2 GHz or X-band 10 GHz). This system can remotely sense breathing and heartbeat movements of living subjects. This automatic clutter-cancellation subsystem improves manual clutter-cancellation in microwave systems. A series of experiments have been conducted to demonstrate the applicability of this microwave life-detection system for rescue purposes. The 2-GHz system performs well for remotely detecting human breathing and heartbeat signals through a pile of rubble of up to about three feet thick.<>
Keywords :
attenuators; biological techniques and instruments; biomedical equipment; biomedical measurement; computerised instrumentation; disasters; microcomputer applications; microwave detectors; phase shifters; radar clutter; remote sensing by radar; safety systems; 10 GHz; 2 GHz; L-band; X-band; breathing; disasters; heartbeat; microprocessor-controlled automatic clutter-cancellation; microwave life-detection systems; programmable microwave attenuator; programmable microwave phase-shifter; rescue; Attenuators; Automatic control; Clutter; Control systems; Earthquakes; Heart beat; Humans; L-band; Microwave amplifiers; Surface waves;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
