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Telfor Journal
2015, vol. 7, iss. 2, pp. 62-67
article language: English
document type: unclassified
doi:10.5937/telfor1502062B
Collaborative beamforming techniques for data transmission in wireless sensor networks
aUniversity of Belgrade, 'Mihajlo Pupin' Institute, Belgrade
bUniversidade Lusofona de Humanidades e Technologias, Lisbon, Portugal + UNINOVA - Campus FCT/UNL, Caparica, Portugal

e-mail: lazar.berbakov@pupin.rs, beko.marko@gmail.com

Project

Development and Modeling of Energy-Efficient, Adaptable, Multiprocessor and Multisensor Low-Power Electronic Systems (MESTD - 32043)
Bilateral Cooperation Project Portugal-Serbia No. 451-03-02338/2012-14/11
The work of Marko Beko was partially supported by Fundaçâo para a Ciência e a Tecnologia under Projects PEst-OE/E

Abstract

Collaborative beamforming is a technique for improving energy efficiency of uplink communications in wireless sensor networks. It is done by synchronizing carrier phases of individual sensor nodes precisely enough, so that they jointly form a beampattern with a stable mainlobe. In this paper, we analyze the impact of additive noise in the received signal on the behavior of an iterative phase synchronization scheme. Besides, we analyze the bit error rate performance of such collaborative transmission. In particular, we consider a decentralized antenna array where sensors are allowed to perform distributed carrier synchronization and collaborative data transmission simultaneously. We evaluate the system performance by using numerical simulations and provide a semi-analytical solution for the algorithm convergence characteristics and the overall bit error rate as a function of the algorithm's iteration index.

Keywords

Collaborative Beamforming; Wireless Sensor Networks

References

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