Transmitter network with a single transmitter frequency

摘要

Improved transmitter network with a single transmitter frequency. PPA transmitter network comprising a plurality of transmitters having a like transmitter frequency may cause disturbance to occur in an adjacent similar transmitter network. This disturbance is not of an echo signal type, so that cancellation thereof is difficult. For eliminating this disturbance as much as possible, a transmitter network is used wherein a main transmitter is associated with auxiliary transmitters having an aerial height which becomes smaller for auxiliary transmitters located more closely to the boundary of the desired coverage area of the system.