Experiments and analysis of stand-alone GPS for relative location discovery for SASNet


  1. Zhou, Y.
  2. Schembri, J.
  3. Lamont, L.
  4. Bird, J.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN)
In this report, we use experimental data to study the performance of stand-alone Global Positioning System (GPS) for relative location discovery for the Self-healing Autonomous Sensor Network (SASNet) project. The objective is to seekunderstand if stand-alone GPS measurements from inexpensive GPS receivers can result in the relative positioning accuracies desired by wireless ad hoc sensor network applications. The relative locations are obtained by comparisons of stand-alone global GPS position fixes. In this study, various sensor deployment scenarios are used that are representative of the real operational conditions of SASNet, which vary from minimal to heavy canopy cover and multipath effects around urban canopy and buildings. The ground truth sensor node locations are estimated by measuring the internode distances between all the sensor nodes and applying the multidimensional scaling (MDS) technique. The analysis is based on the approach of Procrustes analysis. Based on the results, conclusions are made about the suitability of stand-alone GPS as a localization tool in wireless sensor networks.

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Report Number
DRDC-OTTAWA-TM-2010-140 — Technical Memorandum
Date of publication
01 Aug 2010
Number of Pages
Electronic Document(PDF)

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