Energy efficient collaborative beamforming in wireless sensor networks

Reducing energy consumption is critical for wireless sensor networks. The dominant factor is the energy for data transmission. Collaborative beamforming can save transmission energy by improving the directivity of electromagnetic waves so that the signal at the receiver is stronger. Compared with a...

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Bibliographic Details
Published in2009 IEEE International Symposium on Circuits and Systems (ISCAS) pp. 2161 - 2164
Main Authors Jing Feng, Yung-Hsiang Lu, Byunghoo Jung, Peroulis, D.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.05.2009
Subjects
Array signal processing
Clocks
Collaboration
Data security
Electromagnetic scattering
Energy consumption
Energy efficiency
Frequency synchronization
Transmitters
Wireless sensor networks
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ISBN1424438276
9781424438273
ISSN0271-4302
DOI10.1109/ISCAS.2009.5118224

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Summary:Reducing energy consumption is critical for wireless sensor networks. The dominant factor is the energy for data transmission. Collaborative beamforming can save transmission energy by improving the directivity of electromagnetic waves so that the signal at the receiver is stronger. Compared with a single transmitter, collaborative beamforming spreads the long distance transmission energy over multiple transmitters. This balances the battery lifetime on individual nodes because each transmitter can use lower power. However, beamforming depends on proper coordination of phases among the participating sensor nodes. This requires communication among the sensor nodes and consumes energy. This paper investigates whether the transmission energy can be saved by using beamforming based on the number of nodes and the total size of data needed to transmit. We determine the minimum size of data to balance the communication overhead when given the total number of nodes.
ISBN:1424438276
9781424438273
ISSN:0271-4302
DOI:10.1109/ISCAS.2009.5118224