Diversity Measurements for Indoor Radio Communications

by

Jean-Francois Lemieux

M. Eng., 1990

Abstract

Signal propagation for the indoor radio channel has been shown to suffer from multipath fading and strong attenuation. In this work, a transmitter and diversity receiver were designed and implemented to characterize the indoor radio channel using frequency, space and polarization diversity. Selection combining was used. Statistical analysis of the data gathered was performed and envelope level distribution were calculated. Frequency diversity results showed that maximum improvement occurs with any frequency spacing above 10 MHz. Partial improvement occurs with a spacing of 5 MHz. Space diversity results showed that maximum improvement occurs with any antenna spacing above 3/4 wavelength. Polarization results have shown that partial improvement is achieved, although smaller than that achievable with two uncorrelated channels. attenuation results were presented in the form of the exponent of the distance-power law: it was between 3.56 and 3.49, in agreement with published results for similar types of building construction.

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