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- Type of Document: M.Sc. Thesis
- Language: Farsi
- Document No: 51937 (05)
- University: Sharif University of Technology
- Department: Electrical Engineering
- Advisor(s): Haj Sadeghi, Khosro
- Abstract:
- The millimeter wave (mmWave) band, a prime candidate for 5G cellular networks, seems attractive for wireless energy harvesting since it will feature large antenna arrays and extremely dense base station (BS) deployments. The viability of mmWave for energy harvesting though is unclear, due to the differences in propagation characteristics, such as extreme sensitivity to building blockages. But in this research, a scenario is considered in which low-power devices extract energy and/or information from the mmWave signals. Using stochastic geometry, analytical expressions are derived for the energy coverage probability, the average harvested power, and the overall (energy-and-information) coverage probability at a typical wireless-powered device in terms of the BS density, the antenna geometry parameters, and the channel parameters. Numerical results reveal At the BSs, optimizing the antenna geometry parameters, such as beamwidth, can maximize the network-wide energy coverage for a given user population.also at the device level, the performance can be substantially improved by optimally splitting the received signal for energy and information extraction, and by deploying multi-antenna arrays. In this research, in order to increase the success probability, solutions have been proposed to optimize the power splitting ratio. First, by providing an algorithm based on choosing the optimal power splitting ratio instead of a constant value for it, trying to increase the success probability. Then, a structure is proposed to better utilize of the received signal power. In the end, in order to optimize the overall (energy-and-information) coverage probability, an algorithm is presented with a dynamic power splitting ratio for the system
- Keywords:
- Simultaneous Wireless Information and Power Transfer ; Millimeter Wave ; Power Divider ; Beam Shaping ; Antenna Array
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