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Multicarrier WCDMA Feasibility (Part 4)

Posted: 27 Aug 2007     Print Version  Bookmark and Share

Keywords:WCDMA  multi-carrier transceiver  PA linearization  digital predistortion 

This article is part of a series discussing the feasibility of implementing a multi-carrier transceiver for WCDMA or Wideband Code Division Multiple Access, a type of 3G cellular network, and discusses the required performance of the major subsystem. It gives an in-depth look at power amplifier (PA) linearization.

A method for increasing the efficiency of the power amplifier is to allow the amplifier to move closer toward saturation, hence increasing efficiency, but also compensating for the resulting distortion. There are two main approaches to PA linearization, analogue feedforward and digital predistortion.

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