Transmit Power Minimization for MIMO Systems of Exponential Average BER with Fixed Outage Probability

Dian Wu Yue, Yichuang Sun

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Abstract

This paper is concerned with a wireless multiple-antenna system operating in multiple-input multiple-output (MIMO) fading channels with channel state information being known at both transmitter and receiver. By spatiotemporal subchannel selection and power control, it aims to minimize the average transmit power (ATP) of the MIMO system while achieving an exponential type of average bit error rate (BER) for each data stream. Under the constraints on each subchannel that individual outage probability and average BER are given, based on a traditional upper bound and a dynamic upper bound of Q function, two closed-form ATP expressions are derived, respectively, which can result in two different power allocation schemes. Numerical results are provided to validate the theoretical analysis, and show that the power allocation scheme with the dynamic upper bound can achieve more power savings than the one with the traditional upper bound.

Original languageEnglish
Pages (from-to)1951-1970
Number of pages20
JournalWireless Personal Communications
Volume90
Issue number4
Early online date20 Jun 2016
DOIs
Publication statusPublished - 1 Oct 2016

Keywords

  • Channel selection
  • Diversity
  • Fading channel
  • Multi-beam
  • Multiple antennas
  • Multiple-input multiple-output (MIMO)
  • Multiplexing
  • Power control

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