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Transmit Beamforming Optimization Design for Broadband Multigroup Multicast System
Joint Authors
Zhang, Zilong
Xu, Xiaodong
Wu, Yanan
Source
Mathematical Problems in Engineering
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-06-07
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Spectral efficient transmission techniques are necessary and promising for future broadband wireless communications, where the quality of service (QoS) and/or max-min fair (MMF) of intended users are often considered simultaneously.
In this paper, both the QoS problem and the MMF problem are investigated together for transmit beamforming in broadband multigroup multicast channels with frequency-selective fading characters.
We first present a basic algorithm by directly using the results in frequency-flat multigroup multicast systems (Karipidis et al., 2008), namely, the approximation algorithms in this paper, for both problems, respectively.
Due to high computational consumption nature of the approximation algorithms, two reduced-complexity algorithms for each of the two problems are proposed separately by introducing the time-frequency correlations.
In addition, parameters in the new time-frequency formulations, such as the number of optimization matrix variables and the taps of thebeamformer with finite impulse response (FIR) structure, can be used to make a reasonable tradeoff between computationalburden and system performance.
Insights into the relationship between the two problems and some analytical results of thecomputational complexity of the proposed algorithms are also studied carefully.
Numerical simulations indicate the efficiencyof the proposed algorithms.
American Psychological Association (APA)
Zhang, Zilong& Xu, Xiaodong& Wu, Yanan. 2015. Transmit Beamforming Optimization Design for Broadband Multigroup Multicast System. Mathematical Problems in Engineering،Vol. 2015, no. 2015, pp.1-13.
https://search.emarefa.net/detail/BIM-1074148
Modern Language Association (MLA)
Zhang, Zilong…[et al.]. Transmit Beamforming Optimization Design for Broadband Multigroup Multicast System. Mathematical Problems in Engineering No. 2015 (2015), pp.1-13.
https://search.emarefa.net/detail/BIM-1074148
American Medical Association (AMA)
Zhang, Zilong& Xu, Xiaodong& Wu, Yanan. Transmit Beamforming Optimization Design for Broadband Multigroup Multicast System. Mathematical Problems in Engineering. 2015. Vol. 2015, no. 2015, pp.1-13.
https://search.emarefa.net/detail/BIM-1074148
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1074148