Geometrik optik ve fresnel bölgesi kavramları kullanarak çoklu yansımalı sinyallerin saçılma merkezinin hesaplanması

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2013

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Kara, Ali

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Department of Electrical & Electronics Engineering
Department of Electrical and Electronics Engineering (EE) offers solid graduate education and research program. Our Department is known for its student-centered and practice-oriented education. We are devoted to provide an exceptional educational experience to our students and prepare them for the highest personal and professional accomplishments. The advanced teaching and research laboratories are designed to educate the future workforce and meet the challenges of current technologies. The faculty's research activities are high voltage, electrical machinery, power systems, signal and image processing and photonics. Our students have exciting opportunities to participate in our department's research projects as well as in various activities sponsored by TUBİTAK, and other professional societies. European Remote Radio Laboratory project, which provides internet-access to our laboratories, has been accomplished under the leadership of our department with contributions from several European institutions.

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Bu tezde, alıcı tarafından açısal bilgisi kabaca ölçülen bir yansı için muhtemel yansıma noktaları ve bu noktalar ile muhtemel yansıma merkezinin hesaplanması için bir yöntem önerilmektedir. Temelde yöntem, elektromanyetik dalga yayılımı kuramına dayanarak belirli varsayımlar ile ölçülmüş bir yansının düzgün olmayan yeryüzü üzerindeki merkezini hesaplamayı hedeflemektedir. Bu amaçla geometrik optik (GO) kuramı Fresnel bölgesi kuramı ile birlikte, yeryüzüne yönelik sayısal coğrafi bilgilerine, hem alıcı hem de verici konumlarının bilindiği varsayıldığı durumda, uygulanmıştır. Önerilen yöntemin, UHF ve üstü bantlarda, özellikle radar ve elektronik harp uygulamalarındaki menzillerde geçerli olabileceği düşünülmektedir.
In this thesis, a method for determining scattering center (or center of scattering points) of a multipath is proposed, provided that the direction of arrival of the multipath is known by the receiver. The method is based on classical electromagnetic wave principles in order to determine scattering center over irregular terrain. Geometrical optics (GO) along with Fresnel zone concept is employed, as the receiver, the transmitter positions and irregular terrain data are assumed to be provided. The proposed method could be used at UHF bands, especially, operations of radars and electronic warfare applications.

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Elektrik ve Elektronik Mühendisliği, Electrical and Electronics Engineering

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