Novel Predistortion Algorithm for OFDMA

Author

Ali, Saqib ; Markarian, Garik ; Arikan, Erdal

Author_Institution

Dept. of Commun. Syst., Lancaster Univ., Lancaster

fYear

2009

fDate

26-29 April 2009

Firstpage

1

Lastpage

5

Abstract

RF amplifier in a wireless communication system is usually non-linear in nature. If such an amplifier is used in OFDMA based systems, it will cause serious degradation. This degradation will be both in terms of the reduction in BER and the generation of out of band noise. In this paper we have worked on the linearization method of the amplifier. This work is on a hybrid methodology, in which estimation of the model is performed in frequency domain and compensation is performed in time domain. The downlink preamble of the IEEE802.16e system is used here for the estimation purpose. The results for the suppression of spectra are shown at the end.

Keywords

OFDM modulation; WiMax; interference suppression; linearisation techniques; multi-access systems; power amplifiers; radiocommunication; radiofrequency amplifiers; IEEE 802.16 e; OFDMA; amplifier linearization method; predistortion algorithm; Bit error rate; Degradation; Downlink; Frequency domain analysis; Frequency estimation; Noise generators; Noise reduction; Predistortion; Radiofrequency amplifiers; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th

Conference_Location

Barcelona

ISSN

1550-2252

Print_ISBN

978-1-4244-2517-4

Electronic_ISBN

1550-2252

Type

conf

DOI

10.1109/VETECS.2009.5073716

Filename

5073716