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  • Research Article
  • Open Access

A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

  • 1Email author,
  • 1,
  • 1,
  • 2,
  • 2 and
  • 1
EURASIP Journal on Wireless Communications and Networking20092009:821846

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

  • Received: 30 March 2009
  • Accepted: 14 August 2009
  • Published:

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.

Keywords

  • Pulse Width Modulation
  • Radio Frequency Power
  • Pulse Position Modulation
  • OFDM Signal
  • Sigma Delta

Publisher note

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Authors’ 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

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.

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