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Direction finding with a circularly rotated antenna
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090684.pdf
Date
1999
Author
Şen, Eren
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https://hdl.handle.net/11511/2791
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Graduate School of Natural and Applied Sciences, Thesis
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Direction finding with a circularly rotated antenna
Koc, AT; Sen, E; Tanik, Y (2000-06-09)
In this work, a new algorithm for multiple emitter direction finding by using a single antenna moving along a circular trajectory is proposed. The problem is formulated by taking the Doppler frequency shift, caused by the movement of the antenna. into account, and by assuming that the information, hidden in the incoming signals, does not change in the observation duration. The proposed direction finding algorithm is, therefore, based on single snapshot processing and also on the linear prediction method dev...
Direction finding for coherent, cyclostationary signals via a uniform circular array
Atalay Çetinkaya, Burcu; Koç, Arzu; Department of Electrical and Electronics Engineering (2009)
In this thesis work, Cyclic Root MUSIC method is integrated with spatial smoothing and interpolation techniques to estimate the direction of arrivals of coherent,cyclostationary signals received via a Uniform Circular Array (UCA). Cyclic Root MUSIC and Conventional Root MUSIC algorithms are compared for various signal scenarios by computer simulations. A cyclostationary process is a random process with probabilistic parameters, such as the autocorrelation function, that vary periodically with time. Most of ...
Direction finding with a uniform circular array placed on a moving platform
Evirgen, Evrim Anıl; Koç, Arzu Tuncay; Department of Electrical and Electronics Engineering (2001)
Direction finding with a uniform circular array via single snapshot processing
Koc, AT; Tanik, Y (1997-01-01)
In this work a new algorithm for multiple emitter direction finding by using a uniform circular array is proposed. The algorithm is based on single snapshot processing, and therefore, it has no restriction on the coherency of the sources. The problem formulation is based on the transformation of the snapshot. The transformed sequence is formed by taking the discrete Fourier transform of the snapshot and weighting it suitably. It contains the so-called distortion terms, which are taken into account by using ...
Direction finding performance of antenna arrays on complex platforms using numerical electromagnetic simulation tools
Özeç, Mustafa Onur; Tuncer, Temel Engin; Department of Electrical and Electronics Engineering (2011)
An important step for the design of direction finding systems is the performance evaluation using numeric electromagnetic simulation tools. In this thesis, a method is presented for both modeling and simulation in a numeric electromagnetic simulation tool FEKO. The method relies on the data generated by FEKO. The data is then processed by correlative interferometer algorithm. This process is implemented in a MATLAB environment. Different types of antenna arrays including dipole, monopole and discone antenna...
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E. Şen, “Direction finding with a circularly rotated antenna,” Middle East Technical University, 1999.