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Volume 39 Issue 6
Jun.  2013
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Journal of Beijing University of Aeronautics and Astronautics  > 2013  >  (6): 841-846.
Liu Xin, Han Shengqian, Xu Zhikun, et al. Energy-efficient uplink training for downlink multi-antenna transmission[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (6): 841-846. (in Chinese)
Citation: Liu Xin, Han Shengqian, Xu Zhikun, et al. Energy-efficient uplink training for downlink multi-antenna transmission[J]. Journal of Beijing University of Aeronautics and Astronautics, 2013, (6): 841-846. (in Chinese)
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Energy-efficient uplink training for downlink multi-antenna transmission

  • School of Electronic and Information Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 17 Jun 2012
  • Publish Date: 30 Jun 2013
    Abstract
  • The design of uplink training aimed at maximizing the energy efficiency (EE) for time division duplex (TDD) multi-antenna systems was investigated. It was proved that when the channel estimation errors are taken into account, both the upper bounds of EE and spectrum efficiency (SE) are concave functions of the uplink training length, based on which the impacts of signal-to-noise ratio (SNR) and circuit power consumption on the optimal training length were analyzed. Analytical and simulation results show that the EE-oriented optimization reduces to the SE-oriented optimization at high SNR regime. Yet in general scenarios, a longer training signal is necessary to maximize EE compared to that maximizing SE.

     

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