Low complexity transmit antenna selection with power balancing in OFDM systems

Ki Hong Park, Young Chai Ko, Mohamed Slim Alouini

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this paper, we consider multi-carrier systems with multiple transmit antennas under the power balancing constraint, which is defined as the constraint that the power on each antenna should be limited under a certain level due to the linearity of the power amplifier of the RF chain. Applying transmit antenna selection and fixed-power variable-rate transmission per subcarrier as a function of channel variations, we propose an implementation-friendly antenna selection method which offers a reduced complexity in comparison with the optimal antenna selection scheme. More specifically, in order to solve the subcarrier imbalance across the antennas, we operate a two-step reallocation procedure to minimize the loss of spectral efficiency. We also provide an analytic lower bound on the spectral efficiency for the proposed scheme. From selected numerical results, we show that our suboptimal scheme offers almost the same spectral efficiency as the optimal one.

Original languageEnglish
Article number5595098
Pages (from-to)3018-3023
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume9
Issue number10
DOIs
Publication statusPublished - 2010 Oct

Keywords

  • Transmit antenna selection
  • adaptive modulation
  • orthogonal frequency division multiplexing
  • power balancing constraint

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics

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