Collaborative null-steering beamforming for uniformly distributed wireless sensor networks
IEEE Transactions on Signal Processing
Distributed null-steering beamforming for wireless sensor networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
CIT'11 Proceedings of the 5th WSEAS international conference on Communications and information technology
Efficient Radio Transmission with Adaptive and Distributed Beamforming for Intelligent WiMAX
Wireless Personal Communications: An International Journal
Energy-efficient data dissemination using beamforming in wireless sensor networks
ACM Transactions on Sensor Networks (TOSN)
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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 disconnectivity. 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.