A Cooperative Approach to Sensor Localisation in Distributed Fusion Networks

Murat Uney, Bernard Mulgrew, Daniel E. Clark

Research output: Contribution to journalArticle

20 Citations (Scopus)
62 Downloads (Pure)

Abstract

We consider self-localisation of networked sensor platforms, which are located disparately and collect cluttered and noisy measurements from an unknown number of objects (or, targets). These nodes perform local filtering of their measurements and exchange posterior densities of object states over the network to improve upon their myopic performance. Sensor locations need to be known, however, in order to register the incoming information in a common coordinate frame for fusion. In this work, we are interested in scenarios in which these locations need to be estimated solely based on the multi-object scene. We propose a cooperative scheme which features nodes using only the information they already receive for distributed fusion: we first introduce node-wise separable parameter likelihoods for sensor pairs, which are recursively updated using the incoming multi-object information and the local measurements. Second, we establish a network coordinate system through a pairwise Markov random field model which has the introduced likelihoods as its edge potentials. The resulting algorithm consists of consecutive edge potential updates and Belief Propagation message passing operations. These potentials are capable of incorporating multi-object information without the need to find explicit object-measurement associations and updated in linear complexity with the number of measurements. We demonstrate the efficacy of our algorithm through simulations with multiple objects and complex measurement models.

Original languageEnglish
Pages (from-to)1187-1199
Number of pages13
JournalIEEE Transactions on Signal Processing
Volume64
Issue number5
DOIs
Publication statusPublished - 1 Mar 2016

Keywords

  • Cooperative localization
  • dynamical Markov random fields
  • graphical models
  • Monte Carlo algorithms
  • multi-target tracking
  • sensor networks
  • Simultaneous localization and tracking

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Signal Processing

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