Co-channel interference and its avoidance in close-spaced systems

A review is given of co-channel interference in small-cell systems and of the means for its avoidance. Propagation phenomena are described. A table is given for the separation of base stations having both the same channel and the same supervisory tone, for up to 16 cells per block and zero to seven tones. Curves are given versus distance for the probability of interference from one station and from one or more stations in a seven-cell arrangement. Means for avoiding such interference are reviewed.