Behavioral Modeling and Digital Predistortion of RF Power Amplifiers - CEI-Europe
Course #07

Behavioral Modeling and Digital Predistortion of RF Power Amplifiers

April 23 - 25, 2018 . Amersfoort, The Netherlands

We recommend you to submit your preliminary or firm registration at least 4 weeks before course start to ensure a seat on the course.


The goals of RF power amplifier design are high efficiency and linearity. With modern cellular communications modulation formats such as LTE and WCDMA these goals are difficult to achieve simultaneously with traditional RF PAs, and high-efficiency architectures such as Doherty, Envelope Tracking, and so forth are becoming more commonplace. These PAs require an additional linearization system to achieve the mandated linearity specifications. The emergence of high-speed digital signal processing techniques has enabled the linearization to be accomplished in the digital signal domain, and digital pre-distortion (DPD) is now the preferred linearization technique.

This course explains the nonlinear behavior of RF power amplifiers, developing general modeling techniques to describe the nonlinearities and memory effects. A system-level approach to the modeling and linearization of the PA is adopted, and techniques for implementation of DPD in practical situations are described.

Upon completing the course, the participant will be able to:

  • Understand and describe the nonlinear behavior and memory effects found in RF power amplifiers
  • Use and understand the mathematical algorithms for behavioral modeling and digital pre-distortion
  • Use and implement digital pre-distortion methods for linearization of RF Pas
  • Evaluate and compare modeling and DPD techniques

This course is suitable for RF PA designers, DSP designers, and System-Level engineers who are involved in the specification, design, and implementation of linearized RF PAs and transmitter systems, or who are developing pre-distortion methods, software and algorithms for linearization of RF PAs.

Electrical Engineering degree or equivalent and at least two years applicable practical experience is recommended.



RF Power Amplifiers in Modern Wireless Communications Systems

  • Modern Wireless Communications modulations formats: LTE, WCDMA
  • Signal Metrics: Peak-to-Average Power Ratio
  • High-efficiency PA architectures: Doherty, Envelope Tracking
  • PA metrics: AM-AM, AM-PM, ACLR, EVM

Introduction to Models and Modeling

  • Compact models, Behavioral models
  • Introduction to System Identification methods



Behavioral Modeling Methods

  • Linear System review
  • Nonlinear modeling
  • Memory effects
  • Nonlinear dynamical models: Volterra Series formulations and practical implementations
  • Artificial Neural Networks
  • Frequency-domain models and methods: X-parameters



Digital Pre-Distortion Methods

  • Typical architectures and approaches using digital control techniques; 'indirect learning'; LUT and algorithmic approaches
  • Adaption techniques: convergence, optimization
  • DPD implementations: hardware, system components, power and cost
  • Practical and commercial DPD systems overview

Future Developments

  • Carrier aggregation
  • Wide bandwidths
  • SDR
  • etc


CEI-Europe AB, Teknikringen 1F, SE-583 30 Linköping, Sweden Phone +46-13-100 730 Fax +46-13-100 731