NDLI: A New Transmit Beamforming Technique for Physical-Layer Multicasting in Cellular Downlink Systems

Content Provider	IEEE Xplore Digital Library
Author	Chang-Lung Hsiao Jiann-Ching Guey Wern-Ho Sheen Ren-Jr Chen
Copyright Year	2014
Description	Author affiliation: MediaTek, Hsinchu, Taiwan (Jiann-Ching Guey) \|\| ICL, ITRI, Hsinchu, Taiwan (Chang-Lung Hsiao; Ren-Jr Chen) \|\| Dept. of Commun. Eng., Nat. Chung Cheng Univ., Chiayi, Taiwan (Wern-Ho Sheen)
Abstract	This paper investigates the design of physical-layer multicasting in the cellular downlink systems, where antennas at a base station are used to transmit a common signal to multiple single-antenna users. The central design problem of the physical multicasting is the search of the optimal beamforming vector that maximizes the multicast rate and has been known as an NP-hard problem in the literature. In this paper, a new method based on a two-user approximation is proposed for optimizing the beamforming vector. The method is shown to achieve a much higher multicast rate than the existing methods and provides an attractive tradeoff between performance and complexity, especially for the case of using a large number of antennas.
Starting Page	1
Ending Page	5
File Size	285783
Page Count	5
File Format	PDF
ISBN	9781479944491
DOI	10.1109/VTCFall.2014.6965822
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-09-14
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Array signal processing Vectors Multicast communication Approximation methods Optimization Base stations Complexity theory
Content Type	Text
Resource Type	Article

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