Proposal of housing-site human detection system in 920 MHz band

We have proposed a human detection system using UHF band TV wave. In recent years, a smart meter using 920 MHz band radio wave has attracted attention for developing HEMS. In this study, in order to detect human motion around a house, we proposed housing-site human detection system using the 920 MHz band radio. We investigated the characteristics of radio waves, confirmed the variation of RSSI (Received Signal Strength Indicator) and the appropriate installation location of the receiver. Furthermore, from the difference in RSSI fluctuation of the radio wave, we verified whether human detection is possible based on actual measurements. From the measurement results, we confirmed that the RSSI of 920 MHz band was fluctuated by the movement of human in the housing-site, and also confirmed that there were differences in the RSSI variation characteristics if the location of human movement and the place of receiver installation was different.