TY - GEN
T1 - Battery power efficiency of PPM and FSK in wireless sensor networks
AU - Tang, Qiuling
AU - Yang, Liuqing
AU - Giannakis, Georgios B.
AU - Qin, Tuanfa
PY - 2005
Y1 - 2005
N2 - In wireless sensor networks (WNSs), sensor nodes are usually battery-powered. Hence, energy efficiency is a critical factor in WSNs. Orthogonal modulations suitable for energy-limited WSNs have been investigated under the assumption that batteries are linear and ideal However, these analyses are not valid when more realistic nonlinear battery models are considered. Based on a general model integrating WSN transmission modules with realistic battery models, we derive two battery power-conserving schemes for M-ary pulse position modulation (PPM) and frequency shift keying (FSK). We analyze and compare their battery power efficiencies in various wireless channels. Our results reveal that FSK is more power-efficient than PPM in sparse WSNs, while PPM may outperform FSK in dense WSNs. We also show that in sparse WSNs, the power advantage of FSK over PPM is no more than 3dB; whereas in dense WSNs, the power advantage of PPM over FSK can be significant.
AB - In wireless sensor networks (WNSs), sensor nodes are usually battery-powered. Hence, energy efficiency is a critical factor in WSNs. Orthogonal modulations suitable for energy-limited WSNs have been investigated under the assumption that batteries are linear and ideal However, these analyses are not valid when more realistic nonlinear battery models are considered. Based on a general model integrating WSN transmission modules with realistic battery models, we derive two battery power-conserving schemes for M-ary pulse position modulation (PPM) and frequency shift keying (FSK). We analyze and compare their battery power efficiencies in various wireless channels. Our results reveal that FSK is more power-efficient than PPM in sparse WSNs, while PPM may outperform FSK in dense WSNs. We also show that in sparse WSNs, the power advantage of FSK over PPM is no more than 3dB; whereas in dense WSNs, the power advantage of PPM over FSK can be significant.
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U2 - 10.1109/MILCOM.2005.1606004
DO - 10.1109/MILCOM.2005.1606004
M3 - Conference contribution
AN - SCOPUS:33847338953
SN - 0780393937
SN - 9780780393936
T3 - Proceedings - IEEE Military Communications Conference MILCOM
SP - 2251
EP - 2257
BT - MILCOM 2005
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - MILCOM 2005: Military Communications Conference 2005
Y2 - 17 October 2005 through 20 October 2005
ER -
