Minimization of Energy Consumption for OOK Transmitter Through Minimum Energy Coding
Résumé
Energy consumption of Wireless Sensor Networks (WSNs) includ-
ing On/Off keying (OOK) transmitter is important for short range transmis-
sion and long battery life time requirements. In order to improve the energy
efficiency of an OOK transmitter, the Minimum Energy (ME) coding strategy
is adopted in this paper. We first give the energy consumption model based
on a real OOK transmitter, which has an energy efficiency of 52 pJ/bit by
completely switching off the transmitter during the transmission of low bit ’0’
. Based on this energy consumption model, ME-Coding provides an energy
efficiency of 30 pJ/bit for coding size k = 3. Moreover, larger coding size offers
more significant improvement, at the sacrifice of spectral efficiency and trans-
mission range. In this paper, we have also determined a closed-form solution
for the optimal coding size for a given transmission range constraint.