Impact of Nonlinear Power Amplifier on Link Adaptation Algorithm of OFDM Systems

Author

Das, Suvra Sekhar ; Tariq, Faisal ; Rahman, M. Ishtiaque ; Frederiksen, F.B. ; de Carvalho, Elisabeth ; Prasad, Ranga

Author_Institution

Aalborg Univ., Aalborg

fYear

2007

Firstpage

1303

Lastpage

1307

Abstract

The impact of non linear distortion due to high power amplifier (HPA) on the performance of link adaptation (LA) - orthogonal frequency division multiplexing (OFDM) based wireless system is analyzed. The performance of both forward error control coding (FEC) encoded and uncoded system is evaluated. LA maximizes the throughput while maintaining a required block error rate (BLER). It is found that when OFDM signal, which has high PAPR, suffers non linear distortion due to non ideal HPA, the LA fails to meet the target BLER. Detailed analysis of the distortion and effects on LA are presented in this work.

Keywords

OFDM modulation; error correction codes; error statistics; power amplifiers; radio links; radiofrequency amplifiers; OFDM systems; block error rate; forward error control coding; link adaptation algorithm; non linear distortion; nonlinear power amplifier; orthogonal frequency division multiplexing; wireless system; Error analysis; Error correction; Forward error correction; High power amplifiers; Nonlinear distortion; OFDM; Peak to average power ratio; Performance analysis; Power amplifiers; Throughput;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th

Conference_Location

Baltimore, MD

ISSN

1090-3038

Print_ISBN

978-1-4244-0263-2

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2007.279

Filename

4349928