Indoor Human Detection Systems Using VHF-FM and UHF-TV Broadcasting Waves

This paper studies new indoor human detection systems using VHF-FM and UHF-TV broadcasting waves. By use of the broadcasting waves as radio transmission waves, the proposed systems don´t need a transmitter; the systems are composed of only receiving systems including a receiving antenna and a receiver. The proposed systems can detect the presence or absence of human in a room, based on the principle that the received levels are fluctuated due to multi-path fading or shadowing with human presence. Remarkably, the proposed systems utilize the indoor multi-path radio propagations of broadcasting waves to detect the human presence. In order to investigate the ability of VHF-FM and UHF-TV human detection systems and compare these systems, we measured the received levels of VHF-FM and UHF-TV broadcasting waves in the room with or without human presence. Consequently, both VHF-FM and UHF-TV detection systems could sense the human presence using an appropriate threshold of the received level fluctuation. And the monitoring period of only 5 seconds could achieve 100 % detection probability in both VHF-FM and UHF-TV detection systems