Spatially Concatenated Channel-Network Code for Underwater Wireless Sensor Networks

Underwater environment monitoring is an important application of wireless sensor networks (WSNs). However, WSNs face challenges, such as erroneous communication, ensuring the lifetime and robustness of the network, and cost constraints. The underwater acoustic channel (UAC) is highly frequency-selec...

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Vydáno v:IEEE transactions on communications Ročník 64; číslo 9; s. 3901 - 3914
Hlavní autoři: Iqbal, Zafar, Lee, Heung-No
Médium: Journal Article
Jazyk:angličtina
Vydáno: New York IEEE 01.09.2016
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Témata:
Acoustics
Codes
Decoding
deployment
LDPC
multipath fading
network coding
OFDM
Power demand
Relays
Sensors
Underwater acoustic communication
Underwater acoustics
Wireless sensor networks
WSN
ISSN:0090-6778, 1558-0857
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Shrnutí:Underwater environment monitoring is an important application of wireless sensor networks (WSNs). However, WSNs face challenges, such as erroneous communication, ensuring the lifetime and robustness of the network, and cost constraints. The underwater acoustic channel (UAC) is highly frequency-selective, and the channel response changes over time because of variations in the channel conditions. Therefore, designing a cooperative coded orthogonal frequency division multiplexing (COFDM) system that is suitable for the doubly selective UAC and has reduced power consumption is very challenging. We propose a cooperative spatial-domain coding scheme combined with the low-density parity-check-coded OFDM system, called spatially concatenated channel-network code, for underwater acoustic WSNs. The designed underwater acoustic WSN exhibits a significant advantage regarding the required number of sensors, bit error rate (BER), and power consumption over the non-cooperative COFDM communication system. We also analyze sensor deployment schemes and find out the area in which our proposed scheme can be beneficial in terms of reduced power consumption and enhanced BER.
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content type line 14
ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2016.2593746