TY - JOUR
T1 - Error control coding in low-power wireless sensor networks
T2 - When is ECC energy-efficient?
AU - Howard, Sheryl L.
AU - Schlegel, Christian
AU - Iniewski, Kris
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006
Y1 - 2006
N2 - This paper examines error control coding (ECC) use in wireless sensor networks (WSNs) to determine the energy efficiency of specific ECC implementations in WSNs. ECC provides coding gain, resulting in transmitter energy savings, at the cost of added decoder power consumption. This paper derives an expression for the critical distance d CR, the distance at which the decoder's energy consumption per bit equals the transmit energy savings per bit due to coding gain, compared to an uncoded system. Results for several decoder implementations, both analog and digital, are presented for d CR in different environments over a wide frequency range. In free space, d CR is very large at lower frequencies, suitable only for widely spaced outdoor sensors. In crowded environments and office buildings, d CR drops significantly, to 3 m or greater at 10 GHz. Interference is not considered; it would lower d CR . Analog decoders are shown to be the most energy-efficient decoders in this study.
AB - This paper examines error control coding (ECC) use in wireless sensor networks (WSNs) to determine the energy efficiency of specific ECC implementations in WSNs. ECC provides coding gain, resulting in transmitter energy savings, at the cost of added decoder power consumption. This paper derives an expression for the critical distance d CR, the distance at which the decoder's energy consumption per bit equals the transmit energy savings per bit due to coding gain, compared to an uncoded system. Results for several decoder implementations, both analog and digital, are presented for d CR in different environments over a wide frequency range. In free space, d CR is very large at lower frequencies, suitable only for widely spaced outdoor sensors. In crowded environments and office buildings, d CR drops significantly, to 3 m or greater at 10 GHz. Interference is not considered; it would lower d CR . Analog decoders are shown to be the most energy-efficient decoders in this study.
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U2 - 10.1155/WCN/2006/74812
DO - 10.1155/WCN/2006/74812
M3 - Article
AN - SCOPUS:33746604820
SN - 1687-1472
VL - 2006
JO - Eurasip Journal on Wireless Communications and Networking
JF - Eurasip Journal on Wireless Communications and Networking
M1 - 74812
ER -