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Boozari, Mahdi | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47075 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Shishegar, Amir Ahmad
  7. Abstract:
  8. In site-specific ultrawideband propagation modeling, electromagnetic field calculations need to be performed by ray tracing at numerous frequencies of the band in order to properly include the frequency variations of the propagation mechanisms and antenna patterns. The number of frequencies at which calculations must be done, must be followed by Nyquist rate. In the previous study, it is showed that, this number can be reduced a lot by using interpolation. In this study the object is optimization of post-processing by using optimized interpolator functions. So, this study develops a systematic procedure for determining the number of required frequency samples of the interpolator functions. Then, the superiority of these functions to the cubic B-spline has been shown by simulations. It is shown that this considerable improvement can be achieved without reducing in accuracy. Generally, ray tracing is done in the environment which is built with the slab layer walls. In the next part of this study, some operations are done to achieve more accurate propagation modeling of ultrawideband electromagnetic wave. So in the indoor simulations, the walls of the environment are considered multilayer and our results become more realistic. At the end of this study, a systematic procedure is developed for determining the number of required frequency samples of the interpolator functions in the environments which are built with multilayer walls
  9. Keywords:
  10. Ray Tracing ; Indoor Environment ; Ultra Wide Bond (UWB)Propagation ; Cubic B-Spline Function ; Newton Interpolation ; Multilayer Environment ; Chebyshev Interpolation

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