Multiple-antenna multicasting using channel orthogonalization and local refinement

Ahmed Abdelkader, Alex B. Gershman, Nicholas D. Sidiropoulos

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


The problem of single-group multiple-antenna multicasting is considered, where common information should be sent to a large number of users. The multiple-antenna transmitter is assumed to accurately know the instantaneous downlink channel state information (CSI) for all users, and our objective is to design the beamformer complex weights to minimize the total transmitted power subject to individual user quality-of-service (QoS) constraints. In this correspondence, a channel orthogonalization and local refinement based approach is developed to solve this problem in an approximate way. The proposed techniques are shown via computer simulations and real data processing to offer an attractive performance-to-complexity tradeoff as compared to the state-of-the-art multiple-antenna multicasting algorithms.

Original languageEnglish (US)
Article number5437189
Pages (from-to)3922-3927
Number of pages6
JournalIEEE Transactions on Signal Processing
Issue number7
StatePublished - Jul 2010
Externally publishedYes


  • Evolved multimedia broadcast/multicast service (E-MBMS)
  • Multicasting
  • Orthogonalization
  • Transmit beamforming


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