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Conference Paper: Performance of 16-ary DEQAM signalling with a pre-rotated constellation through nonlinear satellite channels.

TitlePerformance of 16-ary DEQAM signalling with a pre-rotated constellation through nonlinear satellite channels.
Authors
Issue Date1988
PublisherIEEE.
Citation
The 1988 IEEE International Conference on Communications (CC’88), Philadelphia, PA., 12-15 June 1988. In Digital Technology - Spanning the Universe Conference Record, 1988, v. 3, p. 1703-1708 How to Cite?
AbstractThe effects of AM-AM and/or AM-PM conversions of a high-power amplifier (HPA) on the performance of a bandlimited 16-ary differentially encoded quadrature amplitude modulated (16-ary DEQAM) system are investigated in the presence of additive white Gaussian noise. The results obtained by computer simulation show that a combination of moderate output backoff from saturation of the HPA and prerotation of the transmitted signal constellation can considerably improve the system performance. The performance of the proposed system is compared to that of a 16-ary DEQAM system using an RF predistorter. The results show that the degradation due to the AM-AM and AM-PM conversion effects of the HPA tested is much less than that of the sum of the degradations caused by the individual AM-AM and AM-PM conversion effects. Also, the AM-AM signal distortion causes more degradation than does the AM-PM signal distortion, under the same assumed conditions. With prerotation and moderate output backoff values of the HPA, the AM-PM distortion in the received signal-space vectors can nearly be eliminated.
Persistent Identifierhttp://hdl.handle.net/10722/158037

 

DC FieldValueLanguage
dc.contributor.authorCheung, SWen_US
dc.contributor.authorAghvami, AHen_US
dc.date.accessioned2012-08-08T08:57:49Z-
dc.date.available2012-08-08T08:57:49Z-
dc.date.issued1988en_US
dc.identifier.citationThe 1988 IEEE International Conference on Communications (CC’88), Philadelphia, PA., 12-15 June 1988. In Digital Technology - Spanning the Universe Conference Record, 1988, v. 3, p. 1703-1708-
dc.identifier.urihttp://hdl.handle.net/10722/158037-
dc.description.abstractThe effects of AM-AM and/or AM-PM conversions of a high-power amplifier (HPA) on the performance of a bandlimited 16-ary differentially encoded quadrature amplitude modulated (16-ary DEQAM) system are investigated in the presence of additive white Gaussian noise. The results obtained by computer simulation show that a combination of moderate output backoff from saturation of the HPA and prerotation of the transmitted signal constellation can considerably improve the system performance. The performance of the proposed system is compared to that of a 16-ary DEQAM system using an RF predistorter. The results show that the degradation due to the AM-AM and AM-PM conversion effects of the HPA tested is much less than that of the sum of the degradations caused by the individual AM-AM and AM-PM conversion effects. Also, the AM-AM signal distortion causes more degradation than does the AM-PM signal distortion, under the same assumed conditions. With prerotation and moderate output backoff values of the HPA, the AM-PM distortion in the received signal-space vectors can nearly be eliminated.en_US
dc.languageengen_US
dc.publisherIEEE.-
dc.relation.ispartofDigital Technology - Spanning the Universe Conference Record-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titlePerformance of 16-ary DEQAM signalling with a pre-rotated constellation through nonlinear satellite channels.en_US
dc.typeConference_Paperen_US
dc.identifier.emailCheung, SW:swcheung@eee.hku.hken_US
dc.identifier.authorityCheung, SW=rp00102en_US
dc.description.naturepublished_or_final_versionen_US
dc.identifier.doi10.1109/ICC.1988.13836-
dc.identifier.scopuseid_2-s2.0-0024126841en_US
dc.identifier.volume3-
dc.identifier.spage1703-
dc.identifier.epage1708-
dc.publisher.placeUnited States-
dc.identifier.scopusauthoridCheung, SW=7202472784en_US
dc.identifier.scopusauthoridAghvami, AH=7006136339en_US
dc.customcontrol.immutablesml 151028 - merged-

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