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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 43368 (05)
- University: Sharif University of Technology
- Department: Electrical Engineering
- Advisor(s): Golestani, Jamaloddin; Hossein Khalaj, Babak
- Abstract:
- In the modern world today, the increasing need for transfering data in high speeds and long distances has encouraged the investors of this area to use more efficient technologies of this field. With regard to the need for extensive and scalable communication networks, reusing the bandwidth in closer distances seems to be inevitable. Hence, finding an optimal way of using resources like bandwidth and power is necessary. In OFDMA-based networks there is no intra-cell interference due to using orthogonal subbands and the most important limiting factor in designing these networks is inter-cell interference. Therefore in this thesis we are gonig to analyase the partial frequency reuse method which is one of the main inter-cell interference mitigation approaches. The main idea of partial frequency reuse is to allocate different reuse factors to the different regions of the surface of a cell. Moreover, distinct sectorisation types can be assigned to these regions. However, deep understanding of the existing trade-offs between the design parameters of a network and finding the scheme with the desirable performance is necessary for implementing these methods in a wireless communication network. From the other point of view, finding an eligible scheme requires classification of all possible schemes and proposing metrics which show the trade-offs between the design parameters of a network properly. In this research, after introducing a suitable framework for classifying possible schemes, we are going to propose appropriate metrics to compare different schemes. Also, unlike the previous researches, we are going to consider downlink and uplink communications simultaneously. In addition, after evaluating the advantages and disadvantages of the proposed schemes, we will mention some ideas for fixing their defects. Results show that by considering the suggested schemes in the introduced framework, we can achieve better performances compared to the schemes which have been considered for partial frequency reuse up to now.
- Keywords:
- Cellular Network ; Orthogonal Frequency Division Multiplexing (OFDM) ; Intercell Interference Mitigation ; Intercell Interference Coordination ; Partial Frequency Reuse
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