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Parameters of Communication Systems Based on OFDM-CDMA
 Blumenstein, Jiří ; Kocur,, Dušan (oponent) ; Baudoin, Genevieve (oponent) ; Fedra, Zbyněk (vedoucí práce)
The focus of this research is in the area of modeling and evaluating of the wireless systems with two dimensional signal spreading, it’s key parameters and dependencies on other features in modern wireless communication chain. The research method adopted in this dissertation includes a development of Matlab based simulators which exploits a statistical approach to show a contribution of proposed algorithms. Furthermore, a model of physical layer of the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE), developed by the Vienna University of Technology, was utilized as a simulation environment suitable for implementation of a two dimensional (2D) signal spreading method and its evaluation as well as comparison of achieved results with the state-of-the-art systems. The findings from this research provide evidence that the Variable Spreading Factor - Orthogonal Code Frequency Division Multiplex (hereafter VSF-OFCDM) employing a 2D spreading is a promising wireless access scheme superior to Orthogonal Division Frequency Multiplex (OFDM) or Code Division Multiple Access (CDMA) and is capable to significantly increase the data rates in wireless transmission due to the capability of such system to effectively cope with fast time and frequency fluctuations in the wireless transmission channel.
Úplný záznam
Parameters of Communication Systems Based on OFDM-CDMA
 Blumenstein, Jiří ; Kocur,, Dušan (oponent) ; Baudoin, Genevieve (oponent) ; Fedra, Zbyněk (vedoucí práce)
The focus of this research is in the area of modeling and evaluating of the wireless systems with two dimensional signal spreading, it’s key parameters and dependencies on other features in modern wireless communication chain. The research method adopted in this dissertation includes a development of Matlab based simulators which exploits a statistical approach to show a contribution of proposed algorithms. Furthermore, a model of physical layer of the 3rd Generation Partnership Project Long Term Evolution (3GPP LTE), developed by the Vienna University of Technology, was utilized as a simulation environment suitable for implementation of a two dimensional (2D) signal spreading method and its evaluation as well as comparison of achieved results with the state-of-the-art systems. The findings from this research provide evidence that the Variable Spreading Factor - Orthogonal Code Frequency Division Multiplex (hereafter VSF-OFCDM) employing a 2D spreading is a promising wireless access scheme superior to Orthogonal Division Frequency Multiplex (OFDM) or Code Division Multiple Access (CDMA) and is capable to significantly increase the data rates in wireless transmission due to the capability of such system to effectively cope with fast time and frequency fluctuations in the wireless transmission channel.
Úplný záznam

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