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Article: Performance of a circular signal set in a regenerative satellite system employing TWTA or SSPA

TitlePerformance of a circular signal set in a regenerative satellite system employing TWTA or SSPA
Authors
Issue Date1990
Citation
International Journal Of Satellite Communications, 1990, v. 8 n. 5, p. 379-390 How to Cite?
AbstractThis paper presents the results of a computer-simulation study of a (4,12) circular signal set for use over regenerative satellite links. The signal has a 16-ary symbol alphabet. The satellite transponders and each of the earth-stations use either travelling-wave-tube amplifers (TWTAs) or solid-state power amplifiers (SSPAs) for high-power amplification. Several different earth-stations are assumed to have simultaneous access to a given regenerative satellite, in an arrangement of frequency division multiple access (FDMA). Thus, adjacent-Channel-Interference (ACI) can be introduced into the wanted signal by the immediately adjacent channels. The performances of the signal are compared to those of a 16-ary differentially encoded-quadrature-amplitude-modulated (16-ary DEQAM) signal with a rectangular signal set and the results are used to determine to preferred signal set for spectrally efficient transmission over satellite links. It has been shown that, with TWTAs used for high-power amplification and in the absence of ACI, the circular signal set has an advantage of about 3 dB over the rectangular signal set, at the error rate of 10-4. While in the presence of the ACI, the advantage is 2 dB. With SSPAs, the respective advantages becomes 0.7 and 0.5 dB.
Persistent Identifierhttp://hdl.handle.net/10722/154922
ISSN
2002 Impact Factor: 0.296

 

DC FieldValueLanguage
dc.contributor.authorCheung, SWen_US
dc.date.accessioned2012-08-08T08:31:09Z-
dc.date.available2012-08-08T08:31:09Z-
dc.date.issued1990en_US
dc.identifier.citationInternational Journal Of Satellite Communications, 1990, v. 8 n. 5, p. 379-390en_US
dc.identifier.issn0737-2884en_US
dc.identifier.urihttp://hdl.handle.net/10722/154922-
dc.description.abstractThis paper presents the results of a computer-simulation study of a (4,12) circular signal set for use over regenerative satellite links. The signal has a 16-ary symbol alphabet. The satellite transponders and each of the earth-stations use either travelling-wave-tube amplifers (TWTAs) or solid-state power amplifiers (SSPAs) for high-power amplification. Several different earth-stations are assumed to have simultaneous access to a given regenerative satellite, in an arrangement of frequency division multiple access (FDMA). Thus, adjacent-Channel-Interference (ACI) can be introduced into the wanted signal by the immediately adjacent channels. The performances of the signal are compared to those of a 16-ary differentially encoded-quadrature-amplitude-modulated (16-ary DEQAM) signal with a rectangular signal set and the results are used to determine to preferred signal set for spectrally efficient transmission over satellite links. It has been shown that, with TWTAs used for high-power amplification and in the absence of ACI, the circular signal set has an advantage of about 3 dB over the rectangular signal set, at the error rate of 10-4. While in the presence of the ACI, the advantage is 2 dB. With SSPAs, the respective advantages becomes 0.7 and 0.5 dB.en_US
dc.languageengen_US
dc.relation.ispartofInternational Journal of Satellite Communicationsen_US
dc.titlePerformance of a circular signal set in a regenerative satellite system employing TWTA or SSPAen_US
dc.typeArticleen_US
dc.identifier.emailCheung, SW:swcheung@eee.hku.hken_US
dc.identifier.authorityCheung, SW=rp00102en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0025481794en_US
dc.identifier.volume8en_US
dc.identifier.issue5en_US
dc.identifier.spage379en_US
dc.identifier.epage390en_US
dc.identifier.scopusauthoridCheung, SW=7202472784en_US

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