Optimization of energy harvesting wireless communication systems

Download
2011
Erkal, Hakan
In an energy harvesting communication system, energy is derived from outside sources and becomes partially available at different points in time. The constraints induced by this property on energy consumption plays an active role in the design of efficient communication systems. This thesis focuses on the optimal design of transmission and networking schemes for energy harvesting wireless communication systems. In particular, an energy harvesting transmitter broadcasting data to two receivers in an AWGN broadcast channel assuming that energy harvests and data arrivals occur at known instants is considered. In this system, optimal packet scheduling that achieves minimum delay is analyzed. An iterative algorithm, DuOpt, that achieves the same structural properties as the optimal schedule is proposed. DuOpt is proved to obtain the optimal solution when weaker user data is ready at the beginning. A dual problem is defined and shown to be strictly convex. Taking advantage of the dual problem, uniqueness of the solution of the main problem is proved. Finally, it is observed that DuOpt is almost two orders of magnitude faster than the SUMT (sequential unconstrained minimization technique) algorithm that solves the same problem.

Suggestions

Optimal and implementable transmission schemes for energy harvesting networks
Özçelik, Fatih Mehmet; Uysal Bıyıkoğlu, Elif; Department of Electrical and Electronics Engineering (2012)
Progress in energy harvesting technology and the increasing need for the energy efficient and environmentally friendly applications have called for reconsideration of communication systems. This reconsideration results in new problem formulations regarding the recent developments on energy harvesting systems. Recently, optimal strategies for various types of energy harvesting networks have been developed based on different harvesting models. This thesis reports the results of our research to develop the opt...
Efficient resource allocation in energy harvesting wireless networks
Tekbıyık Ersoy, Neyre; Uysal Bıyıkoğlu, Elif; Department of Electrical and Electronics Engineering (2012)
This thesis presents various studies on energy efficient design of wireless networks. It starts with a survey on recent shortest path based energy efficient routing algorithms developed for ad hoc and sensor networks, making a comprehensive classification for these algorithms. In addition to energy efficient design, sustainable and environmentally friendly deployment of wireless networks demands increased use of renewable energy. However, this calls for novel design principles to efficiently utilize the var...
Control of spatial phase empowering spectral splitting and concentration of solar spectrum
Gün, Berk Nezir; Yüce, Emre (2020-11-25)
Harvesting energy from a broad-spectrum light with high efficiency is a long-standing endeavor given the increasingly important energy source yet to be exploited further: sunlight. No material alone can derive energy from a broadband light with high efficiency. That being the case, the methods benefitting from spectral sub-bands together with concentration are in demand to utilize record level efficiency in photovoltaic cells. It is possible to get these sub-bands by portioning a broadband light through...
OPTIMAL CONTROLLER DESIGN FOR SPEED GOVERNORS OF HYDROELECTRIC POWER PLANT
Altinoz, Okkes Tolga; KOŞALAY, İLHAN; Gezer, Derya (VSB - Technical University of Ostrava, 2020-06-01)
Speed governors have critical importance on hydroelectric power plants, which are adjusted to the rotating speed of hydroelectric generation based on load demand of the grid. The rotating speed is the main factor to balance power generation and load demand. The well-designed controller is needed to control speed governors with high accuracy. A well-defined model is needed to obtain desired control structure. Therefore, in this study, initially, the mathematical model of a hydroelectric power plant is obtain...
Optimal transmission scheduling for energy harvesting systems and implementation of energy efficient scheduling algorithms on software defined radio /
Uçtu, Göksel; Uysal Bıyıkoğlu, Elif; Department of Electrical and Electronics Engineering (2014)
Recently, improving energy efficiency in the rapidly evolving technology field of wireless communications has become an important need. To improve the ease of use, extend the field of application of wireless communications, and sustain the applications that use the technology for longer durations with less energy expenditure, study of energy harvesting systems has gained momentum. In this thesis, an offline scheduling problem in an energy harvesting system has been solved and three scheduling alorithms have...
Citation Formats
H. Erkal, “Optimization of energy harvesting wireless communication systems,” M.S. - Master of Science, Middle East Technical University, 2011.