Identification of electromagnetic scattering mechanisms by two dimensional windowed fourier transform approach


Thesis Type: Postgraduate

Institution Of The Thesis: Middle East Technical University, Faculty of Engineering, Department of Electrical and Electronics Engineering, Turkey

Approval Date: 2004

Thesis Language: English

Student: K. Egemen Germeç

Supervisor: MUSTAFA KUZUOĞLU

Abstract:

In this thesis, it is demonstrated that the two-dimensional Windowed Fourier Transform (WFT) can be effectively used to analyze the local spectral characteristics of electromagnetic scattering signals in the two-dimensional spatial frequency domain. The WFT is the extension of the Short Time Fourier Transform (STFT), which was originally derived to analyze the local spectral characteristics of one dimensional time functions. Since the WFT focuses on the local spectral behavior of the scattered field, the signal localization maps produced in the spectral domain by the WFT can be used to identify the contributions of the rays, at a given location in space, arising from various scattering mechanisms in high frequency applications.