Low complexity transmit antenna selection with power balancing in OFDM systems

Kihong Park, Youngchai Ko, Mohamed-Slim Alouini

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

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. © 2010 IEEE.
Original languageEnglish (US)
Pages (from-to)3018-3023
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume9
Issue number10
DOIs
StatePublished - Oct 2010

ASJC Scopus subject areas

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

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