Switchmode RF and Microwave Power Amplifiers, 2nd Edition

Chapter 11

Predistortion Linearization Techniques

Introduction

Wireless devices have become an ubiquitous part of daily life for billions of people. The projections of sales for these devices, particularly those tailored for mobile applications, do not seem to show any signs of slowing down. Since the radio spectrum is a finite natural resource, one method to accommodate an ever-increasing number of users is to utilize highly efficient modulation schemes that can convey as much information as possible within the narrowest bandwidth. Like most things in nature, there is a trade-off with this approach. Highly spectrum-efficient modulation schemes utilize multi-level combinations of amplitude and phase modulation, which results in a non-constant ...