A Temporal Variation in Indoor Environment

  • A. Jraifi
  • E. H Saidi
  • A. El Khafaji
  • J. El Abbadi
Conference paper
Part of the Lecture Notes in Electrical Engineering book series (LNEE, volume 27)


In order to model the propagation of radio waves and develop a real mobile communications system, a good knowledge of environmental propagation is crucial. Usually, the temporal variations of signal amplitude between transmitter (Tx) and receiver (Rx) are neglected in modeling radio propagation. According to Hashemi (IEEE J Sel Areas Commun, 2003), the effects of temporal variations in the indoor environment caused mostly by human body shadowing cannot be neglected. In this paper we demonstrate the effects of temporal variations due to the movement of persons between Tx and Rx. The method used to predict wave propagation in the indoor environment is a deterministic technique called ray tracing, mainly used for simulating a static environment; and the human body is modeled as a parallelepiped form full of salty water. Finally, we have proposed an algorithm to mitigate the unavailability of the channel when the period of obstruction caused by human bodies becomes significant.


Impulse Response Radio Channel Indoor Environment Radio Link Salty Water 
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Copyright information

© Springer Science+Business Media, LLC 2009

Authors and Affiliations

  • A. Jraifi
    • 1
  • E. H Saidi
    • 2
  • A. El Khafaji
    • 3
  • J. El Abbadi
    • 3
  1. 1.Groupe CPR, Canal, Radio & Propagation, Lab/UFR-PHEMorocco
  2. 2.VACBT, Virtual African Center for Basic Science and Technology, Focal Point Lab/UFR-PHEFac SciencesMorocco
  3. 3.Lab d’Electronique et de Télécommunication, EMIMorocco

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