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Considerations when Designing and Using Virtual Instruments as Building Blocks in Flexible Measurement System Solution
KTH, School of Electrical Engineering (EES), Signal Processing. University of Gävle, Sweden.
Ericsson AB, Stockholm.
Ericsson AB, Stockholm.
Ericsson AB, Stockholm.
2007 (English)In: 2007 IEEE Instrumentation and Measurement Technology Conference, IEEE , 2007, 382-386 p.Conference paper, Published paper (Refereed)
Abstract [en]

In this paper the software and hardware structure of a virtual instrument measurement system is discussed. The focus is on flexibility, modularity, generality and hardware independence. A software architecture that meets these requirements is proposed and discussed in some detail. The proposed software architecture has a layered structure that makes it suitable for implementation of versatile measurement systems. The measurement functionality is encapsulated in its own, hardware independent layer and communicates with its environment, e.g. physical hardware, through intermediary software components. Finally a measurement system for characterization of power amplifiers that is designed following the proposed software architecture, with software driven measurements, is implemented.

Place, publisher, year, edition, pages
IEEE , 2007. 382-386 p.
Series
IEEE Instrumentation and Measurement Technology Conference, ISSN 1091-5281
Keyword [en]
Software architecture, Software driven measurements, Synthetic instruments, Virtual instruments, Measurement theory, Power amplifiers, Virtual reality
National Category
Signal Processing
Identifiers
URN: urn:nbn:se:kth:diva-7755ISI: 000251296800075Scopus ID: 2-s2.0-34648822353ISBN: 978-1-4244-0588-6 (print)OAI: oai:DiVA.org:kth-7755DiVA: diva2:12877
Conference
2007 IEEE Instrumentation and Measurement Technology, IMTC 2007 - Synergy of Science and Technology in Instrumentation and Measurement; Warsaw; 1 May 2007 through 3 May 2007
Note

QC 20100824

Available from: 2007-12-07 Created: 2007-12-07 Last updated: 2014-11-11Bibliographically approved
In thesis
1. Measurement Techniques for Characterization of Power Amplifiers
Open this publication in new window or tab >>Measurement Techniques for Characterization of Power Amplifiers
2007 (English)Doctoral thesis, comprehensive summary (Other scientific)
Abstract [en]

In this thesis a sampling time domain measurement system primarily intended for measurements on radio frequency power amplifiers is discussed. The need for such a measurement system is established. Impairments due to non-ideal measurement instruments are discussed as well as methods to compensate for these impairments. Techniques to improve upon the raw measurement performance of the measurement instruments with regard to bandwidth, dynamic range, linear and nonlinear distortion are discussed.

| A method to simultaneously find the phase and amplitude ripple of a vector signal generator and a vector signal analyzer is presented. The method is verified with extensive measurements.

Two techniques, frequency stitching and Zhu’s generalized sampling theorem, to extend the effective measurement bandwidth of the measurement system is discussed and evaluated with measurements. They are both found to be able to extend the effective bandwidth for measurements of output signals of nonlinear power amplifiers with more than five times.

The measurement system is used for sampled input – output measurements of power amplifiers and the obtained data are fitted to different behavioral power amplifier models including memory. Some different behavioral models are evaluated and compared for different kinds of power amplifiers. A neural network model and extensions to the well-known parallel Hammerstein model are specifically discussed. The parallel Hammerstein model are also used together with frequency stitching and Zhu’s generalized sampling theorem.

A general hardware and software structure of a versatile measurement system based on virtual instruments for measurements on power amplifiers is discussed in some detail. Special attention is given to the software architecture and to the concepts of hardware and software reusability.

An automated, fast, accurate and production-friendly method for two-tone power and frequency sweep measurements, including measurement of the phase of the intermodulation products in addition to the amplitude, is also presented.

Place, publisher, year, edition, pages
Stockholm: KTH, 2007. 59 p.
Series
Trita-EE, ISSN 1653-5146 ; 2007:063
National Category
Signal Processing
Identifiers
urn:nbn:se:kth:diva-4566 (URN)978-91-7178-758-3 (ISBN)
Public defence
2007-12-14, Sal 99:133, Högskolan i Gävle, Kungsbäcksvägen 47, Gävle, 13:00
Opponent
Supervisors
Note
QC 20100823Available from: 2007-12-07 Created: 2007-12-07 Last updated: 2010-08-24Bibliographically approved

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Citation style
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