In this paper, we present the design and evaluation of a system that automatically constructs accurate radio maps for both device-based and device-free WLAN localization systems. The system uses 3D ray tracing enhanced with the uniform theory of diffraction (UTD) to model the electric field behavior and the human shadowing effect.


Localization System Automatic Generation Average Absolute Error Uniform Theory Average Distance Error 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


  1. 1.
    Ghaddar, M., Talbi, L., Denid, T., Charbonneau, A.: Modeling Human Body Effects for Indoor Radio Channel using UTD. In: Canadian Conference on Electrical and Computer Engineering. IEEE, Los Alamitos (2004)Google Scholar
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    Mcnamara, D.A., Pistorius, C.W.I., Malherbe, J.A.G.: Introduction to the Uniform Geometrical Theory of Diffraction. Artech House Publishers, Boston (1990)Google Scholar

Copyright information

© ICST Institute for Computer Science, Social Informatics and Telecommunications Engineering 2012

Authors and Affiliations

  • Ahmed Eleryan
    • 1
  • Mohamed Elsabagh
    • 1
  • Moustafa Youssef
    • 1
    • 2
  1. 1.Dept. of Computer EngineeringAlexandria UniversityEgypt
  2. 2.Dept. of Computer and Systems Eng.Alexandria University and E-JUSTEgypt

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