Digital memory-based predistortion

Author

McBeath, Sean ; Pinckley, Danny

Author_Institution

Motorola Labs, Fort Worth, TX, USA

fYear

2005

fDate

12-17 June 2005

Abstract

A predistortion algorithm based on a memory-based power amplifier model (PA) is presented. The algorithm was tested using a PA measurement system. The predistortion techniques are based on the filtered tapped delay line (TDL) model. Memoryless predistortion techniques are also presented to show the benefits of the memory-based predistortion approach. Memoryless predistortion reduces third order IM by 5-8 dB, while memory-based predistortion reduces third order IM by 18-20 dB.

Keywords

active filters; delay lines; intermodulation distortion; linearisation techniques; power amplifiers; signal processing; digital memory; filtered tapped delay line model; intermodulation distortion; measurement system; memoryless predistortion techniques; power amplifier model; Delay lines; Intermodulation distortion; Linearization techniques; Nonlinear filters; Polynomials; Power amplifiers; Power measurement; Power system modeling; Predistortion; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Symposium Digest, 2005 IEEE MTT-S International

ISSN

01490-645X

Print_ISBN

0-7803-8845-3

Type

conf

DOI

10.1109/MWSYM.2005.1517150

Filename

1517150

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=2164818