ACTIVE INTERFERENCE SUPPRESSION IN A STEERED-BEAM SATELLITE COMMUNICATION SYSTEM

摘要

The invention relates to active interference suppression in a satellitecommunication system, particularly but notexclusively to an apparatus and method for using active interferencesuppression in order to suppress co-channel interference be-tweenuser signals in the communication system. The communication system includes areceive or transmit antenna having a plu-ralityof antenna elements, each antenna element associated with a respective antennaelement signal. The method includes thesteps of calculating complex weighting values for one or more of a pluralityof beam signals, adjusting the beam signals in accor-dancewith the calculated complex weighting values and cancelling co-channelinterference in at least one of the beam signals us-ingthe one or more adjusted derived beam signals to provide an interferencesuppressed output signal. The complex weightingvalues can be calculated based on a constant modulus algorithm.