Title :
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
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;
Conference_Titel :
Vehicular Technology Conference, 2007. VTC-2007 Fall. 2007 IEEE 66th
Conference_Location :
Baltimore, MD
Print_ISBN :
978-1-4244-0263-2
Electronic_ISBN :
1090-3038
DOI :
10.1109/VETECF.2007.279
