Evaluation of Phase Comparison DOA Estimation Methods in Multipath Environments for Millimeter Waves

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Karimi, Parisa | 2015

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 47859 (05)
University: Sharif University of Technology
Department: Electrical Engineering
Advisor(s): Farzaneh, Forouhar
Abstract:
The main objective of this project is to discuss a DOA estimation system performance in a multipath environment. For this goal, first the basics of the DOA Estimation systems are discussed. Evaluation of different types of algorithms and choosing an appropriate one is an important step in this regard. Moreover the comparison of different array structures is necessary to choose the appropriate one. The major part of the project has been dedicated to discussion of multipath phenomenon as a major source of error in DOA estimation and studying the multipath mitigation algorithms to eliminate the aforementioned error. A model based on the concept of Bistatic Radar Cross Section is proposed to simulate a practical multipath environment. Moreover, by the fact that there is no practical isotropic antenna in millimeter wave band, the simulations are repeated for a directional antenna array. Finally by studying multipath mitigation algorithms based on correlation characteristics of the signal which are mostly used in GPS systems, a method to eliminate multipath signal is proposed
Keywords:
Radio Direction Finding ; Multipath Routing ; Cross Sections Radar ; Multiple Signal Classification (MUSIC)Algorithm ; Interferometery ; Bistatic Radar Cross Section