Numerical methods and software
Numerical methods and software
Dynamic fine-grained localization in Ad-Hoc networks of sensors
Proceedings of the 7th annual international conference on Mobile computing and networking
The bits and flops of the n-hop multilateration primitive for node localization problems
WSNA '02 Proceedings of the 1st ACM international workshop on Wireless sensor networks and applications
Location errors in wireless embedded sensor networks: sources, models, and effects on applications
ACM SIGMOBILE Mobile Computing and Communications Review
Wireless sensor networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Robust Positioning Algorithms for Distributed Ad-Hoc Wireless Sensor Networks
ATEC '02 Proceedings of the General Track of the annual conference on USENIX Annual Technical Conference
Distributed localization in wireless sensor networks: a quantitative comparison
Computer Networks: The International Journal of Computer and Telecommunications Networking - Special issue: Wireless sensor networks
An Analysis of Error Inducing Parameters in Multihop Sensor Node Localization
IEEE Transactions on Mobile Computing
Wireless sensor network localization techniques
Computer Networks: The International Journal of Computer and Telecommunications Networking
Cramér-Rao-type bounds for localization
EURASIP Journal on Applied Signal Processing
Relative location estimation in wireless sensor networks
IEEE Transactions on Signal Processing
The constrained total least squares technique and its applicationsto harmonic superresolution
IEEE Transactions on Signal Processing
Localization using ray tracing for underwater acoustic sensor networks
IEEE Communications Letters
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Being a key supporting technology, localization is of significance to the research and implement of other attracting applications in wireless sensor networks. The positioning accuracy and energy consumption are two major indicators of localization performance. In this paper, we are concerned with the problem of optimization for coordinates calculation in localization process, regardless of the specific underlying localization mechanism. In order to improve accuracy and avoid extra energy consumption, we develop three schemes based on least squares and multilateration: Taylor-LS, WLS and CTLS. Moreover, we develop a generalized Cramer-Rao lower bound on the localization errors in multihop scenario to help us theoretically analyze the performance of our localization refinement methods. We evaluate the proposed methods via simulations under various environmental settings. Overall, the simulation results validate the practicality of our proposed localization refinement methods, and show that they outperform multilateration at a certain extent under a wide range of conditions and have no extra communication overhead.