Ultrawideband Digital Predistortion (DPD): The Rewards (Power and Performance) and Challenges of Implementation in Cable Distribution Systems
Patrick Pratt and Frank Kearney
The first cable systems in the U.S. started to appear in the early ’50s. Even with the rapid changes in technology and distribution methods, cable has maintained a prominent position as a conduit for the distribution of data. New technologies have layered themselves on the existing cable network.This article focuses on one aspect of that evolution—power amplifier (PA) digital predistortion (DPD). It’s a term that many involved in cellular system networks will be familiar with. Transitioning the technology to cable brings substantial benefits in terms of power efficiency and performance. With these benefits come substantial challenges; this article dives deep into some of these challenges and provides an overview as to how they may be solved.
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