Global ETD Search

1	Effects of terrain features on wave propagation: high-frequency techniques Sarwar, Muhammad January 2009 (has links) <p>This Master thesis deals with wave propagation and starts with wave propagation basics. It briefly presents the theory for the diffraction over terrain obstacles and describes two different path loss models, the Hata model and a FFT-based model. The significance of this paper is that it gives the simulation results for the models mentioned above and presents a comparison between the results obtained from an empirical formula and the FFT-model. The comparison shows that the approach based on Fast Fourier Transform is good enough for prediction of the path loss and that it is a time efficient method.</p> wave propagation path loss Hata model half-screen FFT-model Telecommunication Telekommunikation
2	Effects of terrain features on wave propagation: high-frequency techniques Sarwar, Muhammad January 2009 (has links) This Master thesis deals with wave propagation and starts with wave propagation basics. It briefly presents the theory for the diffraction over terrain obstacles and describes two different path loss models, the Hata model and a FFT-based model. The significance of this paper is that it gives the simulation results for the models mentioned above and presents a comparison between the results obtained from an empirical formula and the FFT-model. The comparison shows that the approach based on Fast Fourier Transform is good enough for prediction of the path loss and that it is a time efficient method. wave propagation path loss Hata model half-screen FFT-model Telecommunication Telekommunikation
3	Modeling & Performance Analysis of QAM-based COFDM System Zhang, Xu January 2011 (has links) No description available. Electrical Engineering COFDM RS codes Convolutional codes TCM codes LDPC codes ISI HATA Model SUZUKI model LOO model Clarke model Jake's Model

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