Statistical modeling of the indoor radio channel at 10 GHz through propagation measurements .I. Narrow-band measurements and modeling

The aim of this paper is to report the results of a propagation measurement experiment to reach a statistical model of the indoor radio channel at 10 GHz using directive antennas at both terminals. The measurements were conducted on a floor of a university building. The distribution of the received fading envelope was tested to fit the Rayleigh and Rician distributions, but were not satisfactory. The Nakagami distribution was found to give an excellent fit with its parameter, m, depending on the separation between transmitter and receiver. The results of the level crossing rate (LCR) and the average duration of fades (ADFs) confirmed this result. The effect of using reception diversity to improve the quality of the received fading signal was tested. Frequency, space and polarization diversity were applied and the cross correlation between the envelopes of the received fading signals (magnitude and power) in the diversity branches was evaluated. The diversity gain achieved was also evaluated. The effect of three different combining techniques (selection, equal gain and maximal ratio) and the effect of applying a global or moving means to the recorded data was studied.