TW-TOA BASED COOPERATIVE SENSOR NETWORK LOCALIZATION WITH UNKNOWN TURN-AROUND TIME
Paper in proceedings, 2013

This work aims to estimate multiple node positions in the presence of unknown turn-around times within the context of cooperative sensor network localization. In the adopted scheme, each target can communicate with a set of anchors (probably not in sufficient numbers) and a set of other targets. Two-Way Times-of-Arrival between them are measured, which includes unknown processing delays at both channel endpoints. Since finding the Maximum Likelihood Estimates (MLE) of the positions and turn-around times given those measurements poses a difficult nonconvex optimization problem, it is approximated by a Nonlinear Least Squares problem. Then, the positions and turn-around times of multipletargets are estimated jointly by solving an Euclidean Distance Matrix completion problem. Simulations show that the localization accuracy of the proposed method is good, providing an initial point that subsequently enables MLE to attain the Cram┬┤er-Rao Lower Bound for all considered scenarios.

Author

Pinar Oguz-Ekim

Joao Gomes

Paulo Oliveira

Mohammad Reza Gholami

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Erik Ström

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2013(to appear)

Areas of Advance

Information and Communication Technology

Subject Categories

Signal Processing

More information

Created

10/6/2017