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 1

Fingerprint

Antenna Selection
Spectral Efficiency
Orthogonal Frequency Division multiplexing (OFDM)
Balancing
Low Complexity
Orthogonal frequency division multiplexing
Antenna
Antennas
Multicarrier
Power Amplifier
Linearity
Lower bound
Minimise
Numerical Results
Power amplifiers

Keywords

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

ASJC Scopus subject areas

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

Cite this

Low complexity transmit antenna selection with power balancing in OFDM systems. / Park, Ki Hong; Ko, Young-Chai; Alouini, Mohamed Slim.

In: IEEE Transactions on Wireless Communications, Vol. 9, No. 10, 5595098, 01.10.2010, p. 3018-3023.

Research output: Contribution to journalArticle

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