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A Potential Transmitter Architecture for Future Generation Green Wireless Base Station

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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Correspondence to Vandana Bassoo.

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Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Bassoo, V., Tom, K., Mustafa, A.K. et al. A Potential Transmitter Architecture for Future Generation Green Wireless Base Station. J Wireless Com Network 2009, 821846 (2009). https://doi.org/10.1155/2009/821846

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Keywords

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