Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks
Joint Authors
Bai, Lin
Tian, Tian
Huang, Minhua
Chen, Chen
Feng, Meiping
Source
International Journal of Distributed Sensor Networks
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-08-13
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Electronic engineering
Information Technology and Computer Science
Topics
Abstract EN
We consider signal transmission with the aid of multiple half-duplex single-antenna relay nodes using the amplify-and-forward (AF) strategy for a multiuser wireless machine-to-machine (M2M) communication system.
In such a scenario, relay beamforming has been proved to be an effective way to improve system performance by employing spatial diversity gains.
Early works have mostly focused on various centralized relay beamforming schemes based on global channel state information (CSI).
Since global CSI is often unavailable due to geometric locations, power limitation, or other constraints of the relay nodes in M2M networks, our work aims to develop distributed algorithms that each relay node individually learns its own beamforming weights with local CSI.
We propose two suboptimal relay beamforming schemes that only require local CSI to minimize mean square error (MSE) for all the users with nonorthogonal channels.
For multiuser systems with orthogonal channels, we divide the optimization problem into multiple single user problems which then can be solved by each relay independently.
Numerical simulations for the proposed algorithms are presented showing the performance of the proposed schemes is close to that of the optimal scheme with global CSI in terms of bit error rate (BER) criterion.
American Psychological Association (APA)
Chen, Chen& Bai, Lin& Feng, Meiping& Huang, Minhua& Tian, Tian. 2012. Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks. International Journal of Distributed Sensor Networks،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-455036
Modern Language Association (MLA)
Chen, Chen…[et al.]. Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks. International Journal of Distributed Sensor Networks No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-455036
American Medical Association (AMA)
Chen, Chen& Bai, Lin& Feng, Meiping& Huang, Minhua& Tian, Tian. Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks. International Journal of Distributed Sensor Networks. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-455036
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-455036