DISTRIBUTED BEAMFORMING FOR WIRELESS SENSOR NETWORKS WITH RANDOM NODE LOCATION

被引:18
作者
Zarifi, Keyvan [1 ]
Affes, Sofiene [1 ]
Ghrayeb, Ali [2 ]
机构
[1] Univ Quebec, INRS EMT, Montreal, PQ H5A 1K6, Canada
[2] Concordia Univ, Montreal, PQ H3G 1M8, Canada
来源
2009 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS 1- 8, PROCEEDINGS | 2009年
关键词
Beampattern; Distributed beamforming; Network energy consumption; Wireless sensor networks;
D O I
10.1109/ICASSP.2009.4960070
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Due to the unsupervised nature of wireless sensor networks (WSNs), intensive communications are required among the selected nodes to reach a consensus and synchronize prior to entering a distributed beamforming (DBF) procedure. Therefore, a, sensible approach to select the nodes should not only take into account the required beampattern, but also should aim to preserve the inter-node connectivity and the network energy. We show for a uniformly distributed WSN that when the nodes are selected from a ring of proper radii, the resulting beampattern mainlobe is narrower compared to that of the classical DBF technique proposed in [1]. At the same time, our proposed technique may preserve a substantial amount of network energy and reduce the probability of network dis-connectivity. Directivity of the proposed DBF technique is analyzed and an extension of the technique to a multi-ring case is presented. It is shown that the sidelobe peaks can be considerably decreased if the nodes are selected from multiple concentric rings.
引用
收藏
页码:2261 / +
页数:2
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