A Modified Adaptive Pre-distorter for Power Amplifier in OFDM Systems

Author

Qin, Chuan ; Chang, Tianhai ; Liu, Lintong

Author_Institution

Sch. of Electron. & Inf. Eng., South China Univ. of Technol., Guangzhou, China

Volume

2

fYear

2010

fDate

12-14 April 2010

Firstpage

393

Lastpage

397

Abstract

This paper focus on the LUT based digital pre-distortion techniques for non-linear power amplifier in OFDM systems. Compared with the conventional adaptive pre-distortion method, a modified method is proposed, which utilizes interpolation algorithm, with a consideration of the amplitude distribution characteristic of OFDM symbols. The performances of the conventional and modified algorithms are compared in terms of the simulation results and analysis, which demonstrates the performance of the modified method is more outstanding.

Keywords

OFDM modulation; distortion; interpolation; power amplifiers; LUT based digital predistortion techniques; OFDM systems; amplitude distribution; interpolation algorithm; modified adaptive predistorter; nonlinear power amplifier; power amplifier; Analytical models; Mobile communication; Mobile computing; Nonlinear distortion; OFDM; Peak to average power ratio; Power amplifiers; Power engineering computing; Predistortion; Table lookup; Adaptive; Interpolation algorithm; OFDM symbols; Pre-distorter;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Mobile Computing (CMC), 2010 International Conference on

Conference_Location

Shenzhen

Print_ISBN

978-1-4244-6327-5

Electronic_ISBN

978-1-4244-6328-2

Type

conf

DOI

10.1109/CMC.2010.20

Filename

5471288