Measurements and simulation of received signals in rooms and corridors at 900 MHz and in the 20-60 GHz band

The authors discuss CW measurements and simulations of received signals in a room, in corridors, and around corners at 900 MHz and at three frequencies in the 20-60-GHz band, namely, 21.6, 37.2 and 59.6 GHz. Reported measurements include signal transmission with directional antennas in corridors and rooms and around corners with the transmitting station stationary and the receiving station moving autonomously along a fixed path. Ray tracing is used with good success to compare the measurements in corridors with the results of simulations taking into account the main reflections along floors, ceilings and walls. Knife edge diffraction and geometric theory of diffraction are used to explain results of diffraction by corners. Results pertaining to the simulation of signal transmissions at 900 MHz in a single room are presented. The results show, for a sample of transmitter-receiver localizations, the effect of the different multipath rays, from which certain general conclusions can be drawn for improved system design