Energy-constrained modulation optimization for coded systems

8 July 2004

conference paper
Published by Institute of Electrical and Electronics Engineers (IEEE)

Vol. 1, 372-376 Vol.1
https://doi.org/10.1109/glocom.2003.1258264

Abstract

We consider radio applications where the nodes operate on batteries so that energy consumption must be minimized while satisfying given throughput and delay requirements. In this context, we analyze the best modulation strategy to minimize the total energy consumption required to send a given number of bits when error-control codes are used. The total energy consumption includes both the transmission energy and the circuit energy consumption. We show that for both MQAM and MFSK the total energy consumption may be reduced significantly if the transmission time T/sub on/ is optimized to reduce the sum of transmission energy and circuit energy consumption. Our optimization considers both delay and peak-power constraints. Numerical examples are given, where we exhibit up to 90% energy savings over modulation strategies that minimize the transmission energy alone. We also show that the benefit of coding varies with the transmission distance and the underlying modulation schemes.

Keywords

This publication has 6 references indexed in Scilit:

PicoRadio: Ad-hoc wireless networking of ubiquitous low-energy sensor/monitor nodes
Published by Institute of Electrical and Electronics Engineers (IEEE) ,2002
Design challenges for energy-constrained ad hoc wireless networks
IEEE Wireless Communications, 2002
Spectral efficiency in the wideband regime
IEEE Transactions on Information Theory, 2002
A framework for energy-scalable communication in high-density wireless networks
Published by Association for Computing Machinery (ACM) ,2002
Energy efficient Modulation and MAC for Asymmetric RF Microsensor Systems
Published by Association for Computing Machinery (ACM) ,2001
Modulation scaling for Energy Aware Communication Systems
Published by Association for Computing Machinery (ACM) ,2001