RECOMMENDATION ITU-R S.734* - The application of interference cancellers in the fixed-satellite service
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چکیده
The ITU Radiocommunication Assembly, considering a) that one of the principal limitations in achieving greater utilization of the RF spectrum and geostationary orbit for the fixed-satellite service (FSS) is mutual interference among satellite networks operating in common frequency bands and serving the same or adjacent geographical areas; b) that inter-satellite network interference protection is primarily achieved by earth-station antenna discrimination; c) that other techniques such as frequency re-use, improved modulation, higher power satellite transmitters and lower noise receivers may be used to increase communication capacity; d) that some of these techniques increase the susceptibility of satellite networks to mutual interference; e) that the deleterious effects of some of these techniques may be reduced through the employment of interference cancelling devices; f) that the basic principle of interference cancellers is to construct a replica of an interfering signal in both amplitude and phase, and to phase invert the replica and add it to the wanted signal plus interference, recommends 1 that interference cancellers should be used, where cost effective, in satellite communication systems to reduce interference or the effects of interference. NOTE 1 Some examples of interference cancelling techniques are discussed in Annex 1.
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RECOMMENDATION ITU-R SF.1601-2 Methodologies for interference evaluation from the downlink of the fixed service using high altitude platform stations to the uplink of the fixed-satellite service using the geostationary satellites within the band 27.5-28.35 GHz
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