TW-TOA based positioning in the presence of clock imperfections
Artikel i vetenskaplig tidskrift, 2016

This manuscript studies the positioning problem based on two-way time-of-arrival (TW-TOA) measurements in semi-asynchronous wireless sensor networks in which the clock of a target node is unsynchronized with the reference time. Since the optimal estimator for this problem involves difficult nonconvex optimization, two suboptimal estimators are proposed based on the squared-range least squares and the least absolute mean of residual errors. We formulated the former approach as an extended general trust region subproblem (EGTR) and propose a simple technique to solve it approximately. The latter approach is formulated as a difference of convex functions programming (DCP), which can be solved using a concave–convex procedure. Simulation results illustrate the high performance of the proposed techniques, especially for the DCP approach.

Two-way time-of-arrival (TW-TOA)

Clock imperfection

Convex optimization

Trust region subproblems

Positioning

Concave–convex procedure

Författare

Mohammad Reza Gholami

Campanja AB

Sinan Gezici

Bilkent Universitesi

Erik Ström

Chalmers, Signaler och system, Kommunikations- och antennsystem, Kommunikationssystem

Digital Signal Processing: A Review Journal

1051-2004 (ISSN) 1095-4333 (eISSN)

Vol. 59 19-30

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Kommunikationssystem

Signalbehandling

DOI

10.1016/j.dsp.2016.07.023

Mer information

Skapat

2017-10-07