Novel predistortion algorithm for OFDMA

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Novel predistortion algorithm for OFDMA.pdf (325.69 KB)

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2009

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Abstract

The 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.

Source Title

Proceedings of the IEEE 69th Vehicular Technology Conference, VTC 2009

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IEEE

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Keywords

802.16em 802.16m, High power amplifier, Non-linearity, OFDMA, WuMAX, Cellular telephone systems, Communication systems, Frequency division multiple access, Global system for mobile communications, Mobile computing, Photodegradation, Power amplifiers, Frequency estimation

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http://hdl.handle.net/11693/28738

Published Version (Please cite this version)

http://dx.doi.org/10.1109/VETECS.2009.5073716

Collections

Scholarly Publications - Electrical and Electronics Engineering

Language

English

Type

Conference Paper