Performance Comparison of Energy-Efficient Power Control for CDMA and Multiuser UWB Networks

TL;DR

This paper compares energy-efficient power control in CDMA and UWB networks, deriving explicit utility expressions at Nash equilibrium and showing their substantial equivalence through analysis and simulations.

Contribution

It introduces a game-theoretic analysis of power control in both schemes, providing explicit utility formulas and a measure of performance loss, highlighting their similarities.

Findings

Explicit utility expressions at Nash equilibrium for both schemes.

Substantial performance equivalence between CDMA and UWB.

Simulation results validate the analytical models.

Abstract

This paper studies the performance of a wireless data network using energy-efficient power control techniques when different multiple access schemes, namely direct-sequence code division multiple access (DS-CDMA) and impulse-radio ultrawideband (IR-UWB), are considered. Due to the large bandwidth of the system, the multipath channel is assumed to be frequency-selective. By making use of noncooperative game-theoretic models and large-system analysis tools, explicit expressions for the achieved utilities at the Nash equilibrium are derived in terms of the network parameters. A measure of the loss of DS-CDMA with respect to IR-UWB is proposed, which proves substantial equivalence between the two schemes. Simulation results are provided to validate the analysis.