Energy-efficient localization in networks of underwater drifters
Proceedings of the second workshop on Underwater networks
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Performance evaluation of wireless sensor network with hybrid channel access mechanism
Journal of Network and Computer Applications
Lifetime and coverage guarantees through distributed coordinate-free sensor activation
Proceedings of the 15th annual international conference on Mobile computing and networking
IEEE Transactions on Signal Processing
The use of symmetric multi-way two phase ranging to compensate time drift in wireless sensor network
IEEE Transactions on Wireless Communications
Genetic coverage verification without location information using dimension reduction
WiOPT'09 Proceedings of the 7th international conference on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks
EURASIP Journal on Advances in Signal Processing - Special issue on advances in signal processing for maritime applications
Lifetime and coverage guarantees through distributed coordinate-free sensor activation
IEEE/ACM Transactions on Networking (TON)
Analyzing localization errors in one-dimensional sensor networks
Signal Processing
Generic coverage verification without location information using dimension reduction
IEEE/ACM Transactions on Networking (TON)
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In this paper, we present new analytical, simulated, and experimental results on the performance of relative location estimation in multihop wireless sensor networks. With relative location, node locations are estimated based on the collection of peer-to-peer ranges between nodes and their neighbors using a priori knowledge of the location of a small subset of nodes, called reference nodes. This paper establishes that when applying relative location to multihop networks the resulting location accuracy has a fundamental upper bound that is determined by such system parameters as the number of hops and the number of links to the reference nodes. This is in contrast to the case of single-hop or fully connected systems where increasing the node density results in continuously increasing location accuracy. More specifically, in multihop networks for a fixed number of hops, as sensor nodes are added to the network the overall location accuracy improves converging toward a fixed asymptotic value that is determined by the total number of links to the reference nodes, whereas for a fixed number of links to the reference nodes, the location accuracy of a node decreases the greater the number of hops from the reference nodes. Analytical expressions are derived from one-dimensional networks for these fundamental relationships that are also validated in two-dimensional and three-dimensional networks with simulation and UWB measurement results.