A New Beamforming Design for Multicast Systems
- Authors
- Lee, Wookbong; Park, Haewook; Kong, Han-Bae; Kwak, Jin Sam; Lee, Inkyu
- Issue Date
- Oct-2013
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Downlink beamforming; multicast channels; multicasting
- Citation
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, v.62, no.8, pp.4093 - 4097
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
- Volume
- 62
- Number
- 8
- Start Page
- 4093
- End Page
- 4097
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/102102
- DOI
- 10.1109/TVT.2012.2236583
- ISSN
- 0018-9545
- Abstract
- 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.
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Collections - College of Engineering > School of Electrical Engineering > 1. Journal Articles
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