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Geostationary payload concepts for personal satellite communicationsThis paper reviews candidate satellite payload architectures for systems providing world-wide communication services to mobile users equipped with hand-held terminals based on large geostationary satellites. There are a number of problems related to the payload architecture, on-board routing and beamforming, and the design of the S-band Tx and L-band Rx antenna and front ends. A number of solutions are outlined, based on trade-offs with respect to the most significant performance parameters such as capacity, G/T, flexibility of routing traffic to beams and re-configuration of the spot-beam coverage, and payload mass and power. Candidate antenna and front-end configurations were studied, in particular direct radiating arrays, arrays magnified by a reflector and active focused reflectors with overlapping feed clusters for both transmit (multimax) and receive (beam synthesis). Regarding the on-board routing and beamforming sub-systems, analog techniques based on banks of SAW filters, FET or CMOS switches and cross-bar fixed and variable beamforming are compared with a hybrid analog/digital approach based on Chirp Fourier Transform (CFT) demultiplexer combined with digital beamforming or a fully digital processor implementation, also based on CFT demultiplexing.
Document ID
19940018292
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Benedicto, J.
(European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Rinous, P.
(European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Roberts, I.
(European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Roederer, A.
(European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Stojkovic, I.
(European Space Agency. European Space Research and Technology Center ESTEC, Noordwijk, Netherlands)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: JPL, Proceedings of the Third International Mobile Satellite Conference (IMSC 1993)
Subject Category
Communications And Radar
Accession Number
94N22765
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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