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Article: Performance of a satellite modem transmitting convolutionally and differentially encoded 8PSK signals

TitlePerformance of a satellite modem transmitting convolutionally and differentially encoded 8PSK signals
Authors
Issue Date1993
PublisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://interscience.wiley.com/jpages/1542-0973
Citation
International Journal Of Satellite Communications, 1993, v. 11 n. 1, p. 19-32 How to Cite?
AbstractThe paper studies a digital satellite modem for mobile systems. The modem transmits a convolutionally and differentially encoded eight-phase-shift-keyed (CDE8PSK) signal over a satellite link and employs a near-maximum-likelihood decoder at the receiver. The signal can tolerate phase ambiguities that are multiples of π/4 radians, which normally result from the carrier recovery loop at the receiver. However, the carrier recovery loop is not considered here. The high-power amplifier (HPA) at the earth-station transmitter may introduce non-linear distortion to the CDE8PSK signal, and predistortion may or may not be used. Several different earth-stations are assumed to have simultaneous access to a given transponder on the satellite, in an arrangement of frequency division multiple access, but the satellite transponder is assumed to be linear. Thus the CDE8PSK signals that occupy the immediately adjacent frequency bands can introduce adjacent-channel interference (ACI) to the desired CDE8PSK signal. Extensive computer-simulation tests have been carried out to evaluate the effects of non-linear distortion with predistortion, in the presence of ACI, on the tolerance of the modem to additive white Gaussian noise. Four different bandwidths of the transmitted signal are considered, together with three different arrangements of the demodulator. The predistorter operates on the baseband signal at the input to the modulator and assumes a prior knowledge of the HPA characteristics. In all simulation tests, an equivalent baseband model of the transmission system is used, and the results are used to determine the preferred modem design.
Persistent Identifierhttp://hdl.handle.net/10722/154973
ISSN
2002 Impact Factor: 0.296
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorClark, APen_US
dc.contributor.authorCheung, SWen_US
dc.date.accessioned2012-08-08T08:31:21Z-
dc.date.available2012-08-08T08:31:21Z-
dc.date.issued1993en_US
dc.identifier.citationInternational Journal Of Satellite Communications, 1993, v. 11 n. 1, p. 19-32en_US
dc.identifier.issn0737-2884en_US
dc.identifier.urihttp://hdl.handle.net/10722/154973-
dc.description.abstractThe paper studies a digital satellite modem for mobile systems. The modem transmits a convolutionally and differentially encoded eight-phase-shift-keyed (CDE8PSK) signal over a satellite link and employs a near-maximum-likelihood decoder at the receiver. The signal can tolerate phase ambiguities that are multiples of π/4 radians, which normally result from the carrier recovery loop at the receiver. However, the carrier recovery loop is not considered here. The high-power amplifier (HPA) at the earth-station transmitter may introduce non-linear distortion to the CDE8PSK signal, and predistortion may or may not be used. Several different earth-stations are assumed to have simultaneous access to a given transponder on the satellite, in an arrangement of frequency division multiple access, but the satellite transponder is assumed to be linear. Thus the CDE8PSK signals that occupy the immediately adjacent frequency bands can introduce adjacent-channel interference (ACI) to the desired CDE8PSK signal. Extensive computer-simulation tests have been carried out to evaluate the effects of non-linear distortion with predistortion, in the presence of ACI, on the tolerance of the modem to additive white Gaussian noise. Four different bandwidths of the transmitted signal are considered, together with three different arrangements of the demodulator. The predistorter operates on the baseband signal at the input to the modulator and assumes a prior knowledge of the HPA characteristics. In all simulation tests, an equivalent baseband model of the transmission system is used, and the results are used to determine the preferred modem design.en_US
dc.languageengen_US
dc.publisherJohn Wiley & Sons Ltd. The Journal's web site is located at http://interscience.wiley.com/jpages/1542-0973-
dc.relation.ispartofInternational Journal of Satellite Communicationsen_US
dc.titlePerformance of a satellite modem transmitting convolutionally and differentially encoded 8PSK signalsen_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.doi10.1002/sat.4600110104-
dc.identifier.scopuseid_2-s2.0-0027147952en_US
dc.identifier.hkuros208604-
dc.identifier.volume11en_US
dc.identifier.issue1en_US
dc.identifier.spage19en_US
dc.identifier.epage32en_US
dc.identifier.isiWOS:A1993KZ49700003-
dc.identifier.scopusauthoridClark, AP=7404479647en_US
dc.identifier.scopusauthoridCheung, SW=7202472784en_US

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