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Tutorial 1Title Behaviour Modelling and Digital Predistortion of Wideband WirelessTransmittersInstructorName : Fadhel Ghannouchi , Professor and Chair Address : The University of CalgaryEmail : fghannouchi@ieee.org Phone : (1 403) 220 5807Fax : (1 403) 282 6855Short BiographyFadhel Ghannouchi is currently a professor, iCORE/Canada Research Chairs andDirector of the Intelligent RF Radio Laboratory (www.iradio.ucalgary.ca) in theDepartment of Electrical and Computer Engineering at the University of Calgary,Alberta. He was with Ecole Polytechnique de Montreal until 2005, where he taughtmicrowave theory and techniques and RF communications systems since 1984.He has held several invited positions at several academic and researchinstitutions in Europe, North America and Japan. He has provided consultingservices to a number of microwave and wireless communications companies. Hisresearch interests are in the areas of RF and wireless communications, nonlinearmodeling of microwave devices and communications systems, design of power-and spectrum-efficient microwave amplification systems and design of SDRsystems for wireless and satellite communications applications. His research hasled to over 400 refereed publications and 10 US patents (3 pending). Fadhel Ghannouchi gave tutorials short courses and workshops related tomodelling, impairment compensation and design of RF power amplifiers ...
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Tutorial 1
Title
Behaviour Modelling and Digital Predistortion of Wideband Wireless
Transmitters
Instructor
Name : Fadhel Ghannouchi , Professor and Chair
Address : The University of Calgary
Email : fghannouchi@ieee.org
Phone : (1 403) 220 5807
Fax : (1 403) 282 6855
Short Biography
Fadhel Ghannouchi is currently a professor, iCORE/Canada Research Chairs and
Director of the Intelligent RF Radio Laboratory (www.iradio.ucalgary.ca) in the
Department of Electrical and Computer Engineering at the University of Calgary,
Alberta. He was with Ecole Polytechnique de Montreal until 2005, where he taught
microwave theory and techniques and RF communications systems since 1984.
He has held several invited positions at several academic and research
institutions in Europe, North America and Japan. He has provided consulting
services to a number of microwave and wireless communications companies. His
research interests are in the areas of RF and wireless communications, nonlinear
modeling of microwave devices and communications systems, design of power-
and spectrum-efficient microwave amplification systems and design of SDR
systems for wireless and satellite communications applications. His research has
led to over 400 refereed publications and 10 US patents (3 pending).
Fadhel Ghannouchi gave tutorials short courses and workshops related to
modelling, impairment compensation and design of RF power amplifiers and
transmitters for broadband wireless and satellite applications in several
universities and IEEE sponsored conferences.
Abstract
This tutorial will present the basic concepts in behaviour modelling of wideband
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Tutorial 1
wireless transmitters as well as the state-of-the-art modelling technologies for 3G
and beyond wireless communications systems. The contents of the tutorial will
included the description, explanation, identification and emulation of the dynamic
properties of the wideband wireless transmitters, which are caused by the memory
effects existing mainly in the power amplifiers. The critical issues for accurately
identifying the memory effects in power and spectrum domains will be discussed.
A variety of dynamic behavioural models, such as Volterra series models, memory
polynomial models, neural network models, Wiener models, augmented Wiener
models, Hammerstein models, Augmented Hammerstein models, generalized
Wiener model, Generalized Hammerstein model, etc, will be illustrated and
compared to reveal their accuracy and robust. Examples for applying practical
modulated wideband signals to these models to mimic the dynamic nonlinearities
of the wideband transmitters will be presented and discussed.
Intended Audience
Engineers and graduate students designing wireless or satellite communications
transceivers or involved in research and development activities related to power
amplifiers and transceivers design will certainly benefit from this tutorial.
Motivation
The coexistence of linear and nonlinear distortion sources in the wideband
wireless transmitters of 3G and beyond communication systems compromises
their performances in terms of error vector magnitude (EVM) and adjacent
channel power ratio (ACPR). The minimization of the effects of such distortion
sources relies primarily on accurate modelling of the transmitters.
Objective
The participants will learn:
1. from where the nonlinear distortion is originating;
2. what is memory effects and their effects on the performance of the
predistortion linearizers;
3. how to accurately identify the memory effects;
4. how to validate the different models in modelling the memory effects;
Outline
Basic Concepts ( 1 H)
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Nonlinearity of power amplifiers and transmitters
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Nonlinearity quantification and metrics (C/IMD3, IP3, ACPR, EVM etc)
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Class of operations and performance evaluation of PAs (class A to class C).
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Tutorial 1
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Trade-off between power efficiency and linearity in designing transceivers
Memory Effects (1 H)
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Memory effect definition and its origination
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Memory effect’s affection on the performance of the predistortion linearizers
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Accurately identification of memory effects
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Novel validation approach for evaluating the dynamic nonlinear models
Dynamic Behavior Modeling (1 H)
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Volterra models
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Wiener models
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Traditional Wiener model
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Generalized Wiener model
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Augmented Wiener model
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Hammerstein models
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Traditional Hammerstein model
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Generalized Hammerstein model
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Augmented Hammerstein model
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Neural network models
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