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dc.contributor.authorGhazaany, Tahereh S.*
dc.contributor.authorAbd-Alhameed, Raed A.*
dc.contributor.authorChild, Mark B.*
dc.contributor.authorAli, N.T.*
dc.contributor.authorRodriguez, Jonathan*
dc.contributor.authorHussaini, Abubakar S.*
dc.date.accessioned2010-11-25T16:22:33Z
dc.date.available2010-11-25T16:22:33Z
dc.date.issued06/09/2010
dc.identifier90002586en
dc.identifier.citationHussaini, A.S., Sadeghpour, T., Abd-Alhameed, R.A., Child, M.B., Ali, N.T. and Rodriguez, J.(2010). [Invited paper to the] 6th International ICST Conference on Mobile Multimedia Communications (MobiMedia 2010), EERT-3, Lisbon, Portugal 6-8 September 2010. ISBN: 978-963-9799-98-1. Paper No. 3, pp. 1-6.en
dc.identifier.urihttp://hdl.handle.net/10454/4484
dc.descriptionYesen
dc.description.abstractRF power amplifiers in mobile WiMAX transceivers operate in an inherently nonlinear manner. It is possible to amplify the signal in the linear region, and avoid distortion, using output power back-off; however, this approach may suffer significant reduction in efficiency and power output. This paper investigates the use of Doherty techniques instead of back-off, to simultaneously achieve good efficiency and acceptable linearity. A 3.5 GHz Doherty RFPA has been designed and optimized using a large signal model simulation of the active device, and performance analysis under different drive levels. However, the Doherty EVM is generally poor for mobile WiMAX. Linearity may be improved by further digital pre-distortion, and a simple pre-distortion method using forward and reverse AM-AM and AM-PM modeling. Measurements on the realized amplifier show that this approach satisfies the EVM requirements for WiMAX base stations. It exhibits a PAE over 60%, and increases the maximum linear output power to 43 dBm, whilst improving the EVM.en
dc.language.isoenen
dc.publisherSpringer for the ICSTen
dc.rights© 2010 Springer. Reproduced in accordance with the publisher's self-archiving policy. Original publication will be available at http://www.springerlink.com (Springer Lecture Notes of ICST)en
dc.subjectLinearity
dc.subjectPower amplifieren
dc.subjectOFDMen
dc.subjectDoherty techniquesen
dc.subjectMobile WiMAXen
dc.subjectBase stationsen
dc.subjectDigital pre-distortionen
dc.titleOptimum Design of Doherty RFPA for Mobile WiMAX Base Stationsen
dc.status.refereedYesen
dc.typeConference paperen
dc.type.versionAccepted Manuscripten
refterms.dateFOA2018-07-19T04:19:58Z


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