A new beamforming design for multicast systems

Wookbong Lee, Haewook Park, Han Bae Kong, Jin Sam Kwak, Inkyu Lee

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


In this paper, we study a transmit beamforming technique for multiple-input-multiple-output (MIMO) downlink multicast systems. Assuming that channel state information (CSI) is available at a transmitter, we try to maximize the lowest transmit data rate among users for a given transmit power level. Since finding the optimal beamforming vector requires prohibitively high computational complexity, we propose a reduced complexity scheme by applying greedy vector search and a simple power-allocation (PA) algorithm. Simulation results show that the proposed scheme outperforms the conventional semidefinite relaxation (SDR) technique and provides a performance quite close to the optimal performance with much reduced complexity.

Original languageEnglish
Article number6395847
Pages (from-to)4093-4097
Number of pages5
JournalIEEE Transactions on Vehicular Technology
Issue number8
Publication statusPublished - 2013


  • Downlink beamforming
  • Multicast channels
  • Multicasting

ASJC Scopus subject areas

  • Aerospace Engineering
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Automotive Engineering


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