Εφαρμογές της θεωρίας παιγνίων στις ασύρματες επικοινωνίες
Game Theory is a field of Economics, which studies the interaction of people in environments where each person affects the other with his decisions. These circumstances, under certain conditions, also apply to a telecommunications environment in which individuals are being replaced by on-line devices. The application of game theory in wireless communications, while it is at the research phase, starts giving solutions to an increasing number of problems. In this thesis we will study, how the game theory can solve the problem of uplink power allocation in a CDMA telecommunications system. The 1st Chapter is a comprehensive introduction of game theory. We place great emphasis on the justification of non-cooperative games whose normal form theory is used in the analysis of the application that we implement. Following is a reference to other categories of non-cooperative games and the cooperative games. The 2nd Chapter studies a CDMA wireless telecommunications system in the power control problem and the proposed, on the subject, applications. The 3rd Chapter associates game theory and wireless communications. Also we refer to applications of joint game theory and power control in a CDMA communication system. In Chapter 4 we analyze a proposed non-cooperative model of uplink power allocation in a CDMA system. The implementation and simulation of this model is made in Matlab programming language. Finally, analysis and conclusions are drawn from figures and graphs of simulation.