Transmitter linearisation techniques for the 1.5-1.7 GHz MSAT bands

RJ Wilkinson, JR Macleod, MA Beach, A Bateman

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

The two favoured modulation techniques for MSAT ACSSB and filtered QPSK, both exhibit a non-constant envelope, and thus require linear amplification to avoid undue spectral spreading into adjacent channels. Transmitter linearity is not easily achieved at these frequencies. The authors address this problem through the application of feedback control techniques to improve the linearity of the entire transmitter system incorporating the nonlinear amplifying element. It is shown that with appropriate choice of feedback structure, it is possible to improve the linearity of Class C amplifier stages to give superior performance to those of uncompensated Class A devices, thus greatly improving the transmitter power efficiency and reducing component cost
Translated title of the contributionTransmitter linearisation techniques for the 1.5-1.7 GHz MSAT bands
Original languageEnglish
Title of host publicationFifth International Conference on Radio Receivers and Associated Systems, Cambridge
PublisherInstitution of Engineering and Technology (IET)
Pages173 - 176
Number of pages4
ISBN (Print)0863417051
Publication statusPublished - Jul 1990
Event5th International Conference on Radio Receivers and Associated Systems - Cambridge, United Kingdom
Duration: 1 Jul 1990 → …

Conference

Conference5th International Conference on Radio Receivers and Associated Systems
CountryUnited Kingdom
CityCambridge
Period1/07/90 → …

Bibliographical note

Conference Proceedings/Title of Journal: Fifth International Conference on Radio Receivers and Associated Systems
Rose publication type: Conference contribution

Sponsorship: The authors wish to thank David Bennet for his invaluable help with the fabrication of the up- and down- converters and the loop phase shifter for the 1.7GHz system

Other identifier: IEE Publ. No. 325

Keywords

  • mobile radio systems
  • radio transmitters
  • radiofrequency amplifiers
  • satellite relay systems

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    Wilkinson, RJ., Macleod, JR., Beach, MA., & Bateman, A. (1990). Transmitter linearisation techniques for the 1.5-1.7 GHz MSAT bands. In Fifth International Conference on Radio Receivers and Associated Systems, Cambridge (pp. 173 - 176). Institution of Engineering and Technology (IET). http://hdl.handle.net/1983/761