Maximum Correntropy Criterion for Robust TOA-Based Localization in NLOS Environments

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

View graph of relations

Author(s)

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)6325–6339
Journal / PublicationCircuits, Systems, and Signal Processing
Volume40
Issue number12
Online published25 Jul 2021
Publication statusPublished - Dec 2021

Abstract

We investigate the problem of time-of-arrival (TOA)-based localization under possible non-line-of-sight (NLOS) propagation conditions. To robustify the squared-range-based location estimator, we follow the maximum correntropy criterion, essentially the Welsch M-estimator with a redescending influence function which behaves like ℓ0-minimization toward the grossly biased measurements, to derive the formulation. The half-quadratic technique is then applied to settle the resulting optimization problem in an alternating maximization (AM) manner. By construction, the major computational challenge at each AM iteration boils down to handling an easily solvable generalized trust region subproblem. It is worth noting that the implementation of our localization method requires nothing but merely the TOA-based range measurements and sensor positions as prior information. Simulation and experimental results demonstrate the competence of the presented scheme in outperforming several state-of-the-art approaches in terms of positioning accuracy, especially in scenarios, where the percentage of NLOS paths is not large enough.

Research Area(s)

  • Correntropy, Generalized trust region subproblem, Half-quadratic optimization, Non-line-of-sight, Time-of-arrival, Welsch loss

Citation Format(s)

Maximum Correntropy Criterion for Robust TOA-Based Localization in NLOS Environments. / Xiong, Wenxin; Schindelhauer, Christian; So, Hing Cheung; Wang, Zhi.

In: Circuits, Systems, and Signal Processing, Vol. 40, No. 12, 12.2021, p. 6325–6339 .

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review