Analysis of 920 MHz Band Received Power Fluctuation in a Factory Environment

In order to install 920 MHz band wireless communication systems into a factory environment, radio propagation measurement has been conducted in the operating factory. TX and RX antennas were set up at fixed locations where wireless communication devices are expected to be installed, and long-term fluctuations of received power were measured. Also, the received power along the communication path from a station to an auto guided vehicle is measured for mobile devices. By analyzing the probability distribution of the received power, the applicable statistical distribution models for fixed and mobile stations are examined.