Jon Legarda

Feedforward Amplifiers for Wideband Communication Systems (eBook, PDF)

• Format: PDF

Produktbeschreibung

This book has been possible thanks to the research carried out in the field of the linearization techniques applied to digital communication systems, particularly to those with high spectral efficient modulation techniques. It merges in the need of developing frequency efficient modulations with widespread codification techniques. The book puts into practice the Feedforward linearization technique, aimed at improving either the linearity or efficiency parameters of power amplifiers.

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Produktdetails

• Verlag: Springer US
• Seitenzahl: 178
• Erscheinungstermin: 10. November 2006
• Englisch
• ISBN-13: 9780387351384
• Artikelnr.: 37286903

Autorenporträt

Jon Legarda, C.E.I.T., San Sebastian, Spain

Inhaltsangabe

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.