A game-theoretic approach to energy-efficient power control in multicarrier CDMA systems

A game-theoretic model for studying power control in multicarrier code-division multiple-access systems is proposed. Power control is modeled as a noncooperative game in which each user decides how much power to transmit over each carrier to maximize its own utility. The utility function considered here measures the number of reliable bits transmitted over all the carriers per joule of energy consumed and is particularly suitable for networks where energy efficiency is important. The multidimensional nature of users' strategies and the nonquasi-concavity of the utility function make the multicarrier problem much more challenging than the single-carrier or throughput-based-utility case. It is shown that, for all linear receivers including the matched filter, the decorrelator, and the minimum-mean-square-error detector, a user's utility is maximized when the user transmits only on its "best" carrier. This is the carrier that requires the least amount of power to achie...

• Type: Journal
• Year: 2006
• Where: JSAC
• Authors: Farhad Meshkati, Mung Chiang, H. Vincent Poor, Stuart C. Schwartz
• Keywords: Code-division Multiple-access Systems, JSAC 2006, Power Control, Utility Function