Efficient RSS-based collaborative localisation in wireless sensor networks

A. Alhasanat, B. Sharif, C. Tsimenidis, J. Neasham

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

This paper presents a new collaborative location estimation method for wireless sensor networks (WSN), referred to as an iterative tree search algorithm (I-TSA). The proposed method is based on the grid search least square estimator (LSE), which provides efficient estimation in the presence of noisy received signal strength (RSS) range measurements. The complexity analysis of the I-TSA algorithm showed that the computational requirement by each unknown-location sensor node scales linearly with the number of its neighbouring nodes, and that only a small communication overhead is required until its location estimate converges. This, in contrast to centralised methods, such as maximum likelihood estimator (MLE) and multidimensional scaling (MDS), provides a feasible solution for distributed computation in large scale WSN. Furthermore, the performance of I-TSA, is evaluated with reference to the Cramér-Rao bound (CRB) and compared with MLE, MDS and MDS-MLE methods. The results showed that I-TSA achieves lower standard deviations and biases for various simulation scenarios.

Original languageBritish English
Pages (from-to)27-36
Number of pages10
JournalInternational Journal of Sensor Networks
Volume22
Issue number1
DOIs
StatePublished - 2016

Keywords

  • Collaborative localisation
  • Cramér-Rao bound
  • CRB
  • Received signal strength
  • RSS
  • Wireless sensor networks
  • WSNs

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