Distributed null-steering beamforming for wireless sensor networks

Keyvan Zarifi, Sofiene Affes, Ali Ghrayeb

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

Null-steering transmit beamformers aim to maximize the received signal power at the direction of the access point (AP) while inflicting minimal interfering effect on unintended receivers. However, existing null-steering beamformers may not be directly applied to wireless sensor networks (WSNs) as they require every node to be aware of the locations of other nodes in the network. In this paper, a novel null-steering beamformer is introduced that can be implemented in uniformly distributed WSNs in which each node is oblivious of other nodes' locations. The average beampattern expression of the proposed beamformer is derived and its properties are analytically studied. In particular, it is shown that the average beampattern of the proposed beamformer is similar to that of the conventional beamformer in directions with far angular distance from any unintended receiver. The analytical results are also adopted to design a null-steering beamformer with a single null and required average beampattern properties. The optimal null position is obtained which minimizes the maximum sidelobe of the average beampattern while having negligible deteriorating effect on the received power at the AP. Finally, computer simulations are used to validate the analytical results as well as to confirm the effectiveness of the design approach.

Original languageEnglish
Title of host publicationGLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference
DOIs
Publication statusPublished - 2009
Externally publishedYes
Event2009 IEEE Global Telecommunications Conference, GLOBECOM 2009 - Honolulu, HI, United States
Duration: 30 Nov 20094 Dec 2009

Other

Other2009 IEEE Global Telecommunications Conference, GLOBECOM 2009
CountryUnited States
CityHonolulu, HI
Period30/11/094/12/09

Fingerprint

Beamforming
Wireless sensor networks
Computer simulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Zarifi, K., Affes, S., & Ghrayeb, A. (2009). Distributed null-steering beamforming for wireless sensor networks. In GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference [5426160] https://doi.org/10.1109/GLOCOM.2009.5426160

Distributed null-steering beamforming for wireless sensor networks. / Zarifi, Keyvan; Affes, Sofiene; Ghrayeb, Ali.

GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference. 2009. 5426160.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Zarifi, K, Affes, S & Ghrayeb, A 2009, Distributed null-steering beamforming for wireless sensor networks. in GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference., 5426160, 2009 IEEE Global Telecommunications Conference, GLOBECOM 2009, Honolulu, HI, United States, 30/11/09. https://doi.org/10.1109/GLOCOM.2009.5426160
Zarifi K, Affes S, Ghrayeb A. Distributed null-steering beamforming for wireless sensor networks. In GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference. 2009. 5426160 https://doi.org/10.1109/GLOCOM.2009.5426160
Zarifi, Keyvan ; Affes, Sofiene ; Ghrayeb, Ali. / Distributed null-steering beamforming for wireless sensor networks. GLOBECOM 2009 - 2009 IEEE Global Telecommunications Conference. 2009.
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