Co-channel interference in microcellular mobile radio system

Abstract

The probability of co-channel interference is evaluated for a microcellular mobile radio system operating in Rician fading channel. All co-channel cells surrounding the base stations are considered. The results are used to calculate the reuse distance ratio and the cluster size for FM and SSB (single sideband) modulations. It is found that the use of modulation schemes which require a high protection ratio increases the reuse distance ratio for a given co-channel interference level. Also, the lower and upper bounds on probability of co-channel interference are given for different values of the specular-to-random ratio. The effect of traffic load on the interference level is evaluated, and the results obtained indicate that a microcellular system has a higher capacity and suffers less co-channel interference than the conventional cellular system. >