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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

To access the full article, please see PDF.

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

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