Reduction of co-channel interference in cellular communications systems

摘要

Communication cells (11, 12, 13) in a cellular communications system are sectored (A, B, C) by means of steerable directional antennas (5, 6, 7) to enable frequency re-use in cell clusters (11, 12, 13). In order to reduce co-channel interference at blind spots where a mobile subscriber is capable of receiving signals from two base stations (15, 17) on the same carrier frequency (A), the sectors are rotated back and forth between two pre-determined configurations. Thus the co-channel interference averaged over the duration of a call is much reduced.