Change search
ReferencesLink to record
Permanent link

Direct link
Automated Multidimensional Characterization of Power Amplifier for Design and Production
KTH, School of Electrical Engineering (EES), Signal Processing. KTH, School of Electrical Engineering (EES), Centres, ACCESS Linnaeus Centre.
Center for RF Measurement Technology.
Ericsson AB, Gävle.
Center for RF Measurement Technology, University of Gävle.
Show others and affiliations
2009 (English)In: Proceedings IEEE International Instrumentation and Measurement Technical Conference, IEEE , 2009, 144-148 p.Conference paper (Refereed)
Abstract [en]

Designing, optimizing and producing modern power amplifiers (PA) requires new and fast RF (radio frequency) measurement techniques capable of characterizing its real behavior. PAs are a truly multidimensional device where many desired performance parameters are contradictory to each other. This is especially true for the generation of modern communication PAs that require high efficiency, high linearity as well as high bandwidth. This paper presents a software-defined measurement setup for fast and cost efficient multidimensional measurements based on highly accurate standard instruments and a PC. The test bed as well as the graphical user interface is presented along with a demonstration of its functionality. During tuning of tank networks, drain quiescent current, and bias conditions, 3-dimensional graphs can be selected for the most appropriate axes of trade-off parameters to display a true behavior of the PA under test subjected to real-world or close to real-world signals. The measurement system offers the possibility to monitor envelope-tracking dynamic power consumption up to 100 MHz plus the possibility to use high crest factors.

Place, publisher, year, edition, pages
IEEE , 2009. 144-148 p.
, IEEE Instrumentation and Measurement Technology Conference, ISSN 1091-5281
Keyword [en]
Automated multidimensional measurements, power amplifier, time domain measurement, state-of-the-art test-bed, gain distortion-efficiency
National Category
Signal Processing
URN: urn:nbn:se:kth:diva-24527DOI: 10.1109/IMTC.2009.5168432ISI: 000277153600027ScopusID: 2-s2.0-70449895655ISBN: 978-1-4244-3352-0OAI: diva2:351272
I2MTC2009 - International Instrumentation and Measurement, Technology Conference, Singapore, 5-7 May 2009
© 2009 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. QC 20100930Available from: 2012-02-03 Created: 2010-09-13 Last updated: 2012-02-03Bibliographically approved
In thesis
1. Enhancing Radio Frequency System Performance by Digital Signal Processing
Open this publication in new window or tab >>Enhancing Radio Frequency System Performance by Digital Signal Processing
2010 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis measurement systems for the purpose ofcharacterization of radio frequency power amplifiers are studied.Methods to increase the speed, accuracy, bandwidth, as well as toreduce the sampling requirements and testing cost are presented. Amethod intended for signal shaping with respect to peak-to-averageratio reduction and its effects-improvements on the radio frequencyfront-end performance is investigated.

A time domain measurement system intended for fast and accuratemeasurements and characterization of radio frequency poweramplifiers is discussed. An automated, fast and accurate techniquefor power and frequency sweep measurements is presented.Multidimensional representation of measured figure of merits isevaluated for its importance on the production-testing phase ofpower amplifiers.

A technique to extend the digital bandwidth of a measurement systemis discussed. It is based on the Zhu-Frank generalized samplingtheorem which decreases the requirements on the sampling rate of themeasurement system. Its application for power amplifiers behavioralmodeling is discussed and evaluated experimentally.

A general method for designing multitone for the purpose ofout-of-band characterization of nonlinear radio frequency modulesusing harmonic sampling is presented. It has an application with thevalidation of power amplifiers behavioral models in theirout-of-band frequency spectral support when extracted fromundersampled data.

A method for unfolding the frequency spectrum of undersampledwideband signals is presented. It is of high relevance tostate-of-the-art radio frequency measurement systems which capturerepetitive waveform based on a sampling rate that violates theNyquist constraint. The method is presented in a compact form, iteliminates ambiguities caused by folded frequency spectra standingoutside the Nyquist band, and is relevant for calibration matters.

A convex optimization reduction-based method of peaks-to-averageratio of orthogonal frequency division multiplexing signals ispresented and experimentally validated for a wireless local areanetwork system. Improvements on the radio frequency power amplifierlevel are investigated with respect to power added efficiency,output power, in-band and out-of-band errors. The influence of thepower distribution in the excitation signal on power amplifierperformance was evaluated.

Place, publisher, year, edition, pages
SE-100 44 Stockholm, Sweden: Signal Processing, School of Eletrical Engineering, Royal Institute of Technology, 2010. ix, 9 p.
Trita-EE, ISSN 1653-5146 ; 2010:030
urn:nbn:se:kth:diva-24536 (URN)
2010-08-20, 99:132, Kungsbäcksvägen 47 Gävle, SE-801 76, University of Gävle, 10:15 (English)
QC 20101001Available from: 2010-10-01 Created: 2010-09-14 Last updated: 2010-10-01Bibliographically approved

Open Access in DiVA

fulltext(582 kB)165 downloads
File information
File name FULLTEXT02.pdfFile size 582 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopusIEEEXplore

Search in DiVA

By author/editor
Nader, Charles
By organisation
Signal ProcessingACCESS Linnaeus Centre
Signal Processing

Search outside of DiVA

GoogleGoogle Scholar
Total: 166 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 49 hits
ReferencesLink to record
Permanent link

Direct link