DocumentCode :
592191
Title :
Distributed transmit beamforming via feedback-based inter-cluster synchronization
Author :
Jian Hou ; Gangfeng Yan ; Zhiyun Lin ; Wenyuan Xu
Author_Institution :
Coll. of Electr. Eng., Zhejiang Univ., Hangzhou, China
fYear :
2012
fDate :
10-13 Dec. 2012
Firstpage :
1392
Lastpage :
1397
Abstract :
This paper focuses on the problem of achieving optimal transmit beamforming for a collection of wireless sensors. The objective is to design distributed algorithms running on each sensor (each carrying an antenna) such that the signals from all sensors combine constructively at the receiver end and thus, the received power is increased. Towards this goal, we propose two algorithms that are applicable to two types of sensor setups: Taking Turn Distributed Beamforming (TT-DB) for sensors with partial global knowledge and Random Grouping Distributed Beamforming (RG-DB) for sensors with no global knowledge. Both algorithms are iterative whereby each sensor adjusts its phase offset without directly communicating with each other. In each iteration, either one sensor or a subset of sensors are selected and then transmit the signals that are carefully crafted based on the SNR feedback from the receiver end. We have proved that guided by either algorithm, the signals from all sensor nodes converge to perfect phase coherence asymptotically, and our simulation results have shown that the convergence steps of both algorithms are linear with respect to the number of sensor nodes in the group.
Keywords :
array signal processing; correlation methods; synchronisation; wireless sensor networks; distributed transmit beamforming; feedback based intercluster synchronization; optimal transmit beamforming; partial global knowledge; random grouping distributed beamforming; turn distributed beamforming; wireless sensor correlation; Algorithm design and analysis; Array signal processing; Convergence; Partitioning algorithms; Receivers; Signal to noise ratio; Synchronization; Beamforming; cooperative communication; distributed sensors; optimization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Decision and Control (CDC), 2012 IEEE 51st Annual Conference on
Conference_Location :
Maui, HI
ISSN :
0743-1546
Print_ISBN :
978-1-4673-2065-8
Electronic_ISBN :
0743-1546
Type :
conf
DOI :
10.1109/CDC.2012.6425863
Filename :
6425863
Link To Document :
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