Indoor radio propagation measurements at 37.2 GHz

This paper deals with experimental results obtained for narrowband and wideband indoor radio channels at 37.2 GHz. CW results are obtained using two kinds of transmission antennas, omnidirectional and directional. Under LOS condition, the distance-power law exponent is found to be lower than free space condition, walls playing a major role on the sustaining of a high level signal. Large and small scale variations extracted from the original data are shown to follow, respectively, log-normal and Rice distributions. The observed wideband impulse response has delay spreads extending over a range up to 40 ns and a maximum rms value of about 16 ns