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• Zhu, X
• Liu, Y
• Zhang, L
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• Liu, Y
• Zhang, L
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• Zhu, X
• Liu, Y
• Zhang, L

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Sensors 2009, 9(6), 4901-4917; doi:10.3390/s90604901

Review

Distributed Joint Source-Channel Coding in Wireless Sensor Networks

Xuqi Zhu, Yu Liu and Lin Zhang*

School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, 100876 Beijing, China

* Author to whom correspondence should be addressed.

Received: 3 April 2009; in revised form: 15 May 2009 / Accepted: 3 June 2009 / Published: 22 June 2009

(This article belongs to the Special Issue Wireless Sensor Technologies and Applications)

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Abstract: Considering the fact that sensors are energy-limited and the wireless channel conditions in wireless sensor networks, there is an urgent need for a low-complexity coding method with high compression ratio and noise-resisted features. This paper reviews the progress made in distributed joint source-channel coding which can address this issue. The main existing deployments, from the theory to practice, of distributed joint source-channel coding over the independent channels, the multiple access channels and the broadcast channels are introduced, respectively. To this end, we also present a practical scheme for compressing multiple correlated sources over the independent channels. The simulation results demonstrate the desired efficiency.

Keywords: distributed joint source-channel coding; wireless sensor networks; multiple access channels; broadcast channels; information theory

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