Feedforward Amplifiers for Wideband Communication Systems

• Main Author: Legarda, Jon (Author)
• Corporate Author: SpringerLink (Online service)
• Format: Electronic eBook
• Language: English
• Published: Boston, MA : Springer US, 2006.
• Subjects: Engineering.; Electrical engineering.; Microwaves.; Optical engineering.; Electronics.; Microelectronics.; Electronic circuits.; Electronics and Microelectronics, Instrumentation.; Microwaves, RF and Optical Engineering.; Circuits and Systems.; Electrical Engineering.

Feedforward Amplifiers for Wideband Communication Systems has been possible thanks to the research carried out throughout several years in the field of the linearization techniques applied to digital communication systems, particularly to those with high spectral efficient modulation techniques. The...

Table of Contents:

• Dedication. Preface. Acknowledgments
• 1. Introduction
• Radio-Electric transmitters - Historical overview
• Digital communication systems
• Digital modulation
• 2. Nonlinear distortion
• Harmonic distortion
• Intermodulation analysis
• Cross modulation (XMOD)
• Distortion measurement techniques
• Measurements of wideband digital signals
• 3. RF power amplifiers
• Classification of power amplifiers
• Power amplifiers parameters
• Class A
• Class B
• Class AB (outphasing)
• Class C
• Switching amplifiers
• More operating modes
• 4. Linearization techniques
• Classification of the linearization techniques
• Feedback
• Predistortion
• Feedforward
• Efficiency enhancement techniques
• Comparison of linearization techniques
• 5. Feedforward amplifiers
• Feedforward linearization technique
• Feedforward in wideband communications systems
• 6. Implementation of Feedforward amplifiers
• Simulation of the Feedforward architecture
• Selection of the error amplifier
• The adjustment of the cancellation loops
• Distortion enhanced measurement techniques
• Improvements of Feedforward amplifier
• 7. Adaptive Feedforward amplifiers
• Adaptive adjusting methods for Feedforward amplifiers
• Distortion monitoring architectures
• An output signal monitoring architecture
• The adaptive Feedforward amplifier
• Conclusions.