Open Access

A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

  • Vandana Bassoo1Email author,
  • Kevin Tom1,
  • A. K. Mustafa1,
  • Ellie Cijvat2,
  • Henrik Sjoland2 and
  • Mike Faulkner1
EURASIP Journal on Wireless Communications and Networking20092009:821846

https://doi.org/10.1155/2009/821846

Received: 30 March 2009

Accepted: 14 August 2009

Published: 12 November 2009

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.

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Authors’ Affiliations

(1)
Centre for Telecommunications and Micro-Electronics, Footscray Park Campus, Victoria University
(2)
Department of Electrical and Information Technology, Lund University

Copyright

© Vandana Bassoo et al. 2009

This article is published under license to BioMed Central Ltd. 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.