Energy Efficiency in Multi-Hop CDMA Networks: a Game Theoretic Analysis Considering Operating Costs

TL;DR

This paper uses game theory to analyze how receiver choice and transmit power affect energy efficiency in multi-hop DS-CDMA networks, highlighting the benefits of advanced multiuser receivers like MMSE.

Contribution

It introduces a game-theoretic framework for optimizing receiver selection and power control considering both transmit and operating energy in multi-hop networks.

Findings

MMSE receivers significantly improve energy efficiency.

Nash equilibrium balances power and receiver choice for optimal energy use.

Linear multiuser receivers outperform conventional matched filters.

Abstract

A game-theoretic analysis is used to study the effects of receiver choice and transmit power on the energy efficiency of multi-hop networks in which the nodes communicate using Direct-Sequence Code Division Multiple Access (DS-CDMA). A 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 non-cooperative game. Significant gains in energy efficiency are observed when multiuser receivers, particularly the linear minimum mean-square error (MMSE) receiver, are used instead of conventional matched filter receivers.