Range Based Sensor Node Localization in the Presence of Unknown Clock Skews
Paper in proceedings, 2013

We deal with the positioning problem based on two-way time-ofarrival (TW-TOA) measurements in asynchronous wireless sensor networks. The optimal estimator for this problem poses a difficult global optimization problem. To avoid the drawbacks in solving the optimal estimator, we use approximations and derive linear models, which facilitate efficient solutions. In particular, we employ the least squares method and solve a general trust region subproblem to find a coarse estimate. To further refine the estimate, we linearize the measurements and obtain a linear model which can be solved using regularized least squares. Simulation results illustrate that the proposed approaches asymptotically attain the Cram´er-Rao lower bound.

Author

Mohammad Reza Gholami

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

Sinan Gezici

Bilkent Universitesi

Erik Ström

Chalmers, Signals and Systems, Kommunikationssystem, informationsteori och antenner, Communication Systems

ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing - Proceedings

15206149 (ISSN)

4046-4050 6638419

Areas of Advance

Information and Communication Technology

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

Signal Processing

DOI

10.1109/ICASSP.2013.6638419

ISBN

978-1-4799-0356-6

More information

Created

10/8/2017