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Indoor Wave Propagation Alanysis Using Modefied Wavefront Decomposition Method

Babakhani, Behrouz | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42275 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Shishegar, Amir Ahmad
  7. Abstract:
  8. In recent years, there has been a great studying on site-specific indoor wave propagation mechanism. Conventional ray tracing method is the most common way to predict the profile of the signal in these environments. This method provides us with a deep understanding of signal propagation mechanism including reflection, refraction and diffraction. Knowing these characteristics, we can design a wireless system with optimal performance. Modified Wavefrond Decomposition Method is a ray tracing speed up technique. In this method, a bundle of rays will be traced instead of tracing single rays. If a ray bundle illuminates the receiver location, a ray that exactly crosses the receiver point would be generated in source and fully traced to the receiver. Therefore, number of traced rays will decrease which resulted in faster method with less computational burden. During the tracing, if a ray bundle intercepts more than one object in the simulation environment, this ray bundle should be decomposed to smaller ones which intercept only one object. In this thesis, we present a novel and optimum decomposition technique for such ray bundles which produces the minimum number of rays. Moreover, a non uniform source modeling is presented that decrease the need for decomposition. We also provide a solution for this technique when we have any arbitrary curved surfaces. We developed a numerical technique for such surfaces. The numerical results show a good performance for this technique
  9. Keywords:
  10. Electromagnetic Waves Propagation ; Wavefronts Decomposition ; Ray Tracing ; Indoor Environment

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