Energy Efficient Communications in CDMA Networks: A Game Theoretic Analysis Considering Operating Costs

Authors:
S.M. Betz;H.V. Poor
Affiliations:
Dept. of Electr. Eng., Princeton Univ., Princeton, NJ;-
Venue:
IEEE Transactions on Signal Processing - Part II
Year:
2008

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Abstract

A game-theoretic analysis is used to study the effects of receiver choice and transmit power on the energy efficiency of communications in cellular, multi-hop, and peer-to-peer networks in which the nodes communicate using direct-sequence code-division multiple access (DS-CDMA). The unique Nash equilibrium of the game in which the network nodes can choose their receivers as well as their transmit powers to maximize the total number of bits they transmit per unit of energy spent (including both transmit and operating energy) is derived. The energy efficiencies resulting from the use of different linear multiuser receivers in this context are compared for the noncooperative game. Significant gains in energy efficiency are observed when the linear minimum mean-square error (MMSE) receiver is used instead of conventional matched filter receivers.