This article is part of the series Enabling Wireless Technologies for Green Pervasive Computing.

Open Access Research Article

A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

Vandana Bassoo1*, Kevin Tom1, AK Mustafa1, Ellie Cijvat2, Henrik Sjoland2 and Mike Faulkner1

Author Affiliations

1 Centre for Telecommunications and Micro-Electronics, Footscray Park Campus, Victoria University, P.O. Box 14428, 8001 Melbourne, Australia

2 Department of Electrical and Information Technology, Lund University, Sweden

For all author emails, please log on.

EURASIP Journal on Wireless Communications and Networking 2009, 2009:821846 doi:10.1155/2009/821846


The electronic version of this article is the complete one and can be found online at: http://jwcn.eurasipjournals.com/content/2009/1/821846


Received:30 March 2009
Accepted:14 August 2009
Published:12 November 2009

© 2009 The Author(s).

This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Current radio frequency power amplifiers in 3G base stations have very high power consumption leading to a hefty cost and negative environmental impact. In this paper, we propose a potential architecture design for future wireless base station. Issues associated with components of the architecture are investigated. The all-digital transmitter architecture uses a combination of envelope elimination and restoration (EER) and pulse width modulation (PWM)/pulse position modulation (PPM) modulation. The performance of this architecture is predicted from the measured output power and efficiency curves of a GaN amplifier. 57% efficiency is obtained for an OFDM signal limited to 8 dB peak to average power ratio. The PWM/PPM drive signal is generated using the improved Cartesian sigma delta techniques. It is shown that an RF oversampling by a factor of four meets the WLAN spectral mask, and WCDMA specification is met by an RF oversampling of sixteen.

Publisher note

To access the full article, please see PDF.