Overlapped segment piece-wise polynomial pre-distortion for the linearisation of power amplifiers in the presence of high PAPR OFDM signals

Souheil Ben Smida, Konstantinos Mimis, Kevin A Morris, Mark A Beach, Joe P McGeehan, J Lees, J Benedikt, P Tasker

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

10 Citations (Scopus)

Abstract

A modified piece-wise polynomial pre-distortion is proposed, investigated and compared against classic memoryless polynomial pre-distortion. The proposed enhanced piece-wise polynomial pre-distortion uses the overlap between segments to ensure continuity in the total pre-distortion function. The implementation of overlap allows the use of a simple error estimation algorithm to minimise hand over error. The classic and proposed piece-wise pre-distortion performances are assessed and compared for several sets of polynomial coefficients. The proposed method is shown to consistently outperform classical polynomial pre-distortion in terms of required coefficients and linearity improvement. The method is applied for the linearisation of an envelope tracking Class-J PA at 1.7GHz, under a 1.4MHz LTE signal with a 14.4dB PAPR.
Original languageEnglish
Title of host publicationMicrowave Symposium Digest (MTT), 2012 IEEE MTT-S International
Place of PublicationMontreal, QC, Canada
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages1
Number of pages3
DOIs
Publication statusPublished - Jun 2012

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