Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/92022
Type: Artigo de evento
Title: Power Reduction On Qpsk Modulation Codings For Geopositioning Application Using Leo Satellites
Author: Marins C.N.M.
Kaufmann P.
Ferreira Jr. A.A.
De Paiva M.C.
Swart J.W.
Da Silveira A.C.
Abstract: Minimum transmission power using transponders in low earth orbit satellite is a major requirement for the new geo-positioning system, known as Geolocal. It utilises a repeater in space and ground-based precise geodetic reference bases. We discuss and compare two digital codings on the QPSK (quadrature phase shift keying) modulation: concatenated Reed-Solomon/Convolutional Coding and concatenated BCH (Bose-Chaudhuri-Hocquenghem) with LDPC (Low Density Parity Code). We show that the latter brings 8 dB power gain on the whole two-way ground to satellite link allowing a reduction in the power requirements on the small platforms carrying the ttransponders. ©2009IEEE.
Editor: 
Rights: fechado
Identifier DOI: 10.1109/IMOC.2009.5427582
Address: http://www.scopus.com/inward/record.url?eid=2-s2.0-77951729947&partnerID=40&md5=63b1293837df8c1e7fa9958cf59f0347
Date Issue: 2009
Appears in Collections:Unicamp - Artigos e Outros Documentos

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