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Effects of fading and spatial correlation on node selection for estimation in Wireless Sensor Networks

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3 Author(s)
Al-Murad, T. ; EE Dept., King Abdullah Univ. of Sci. & Technol.(KAUST), Saudi Arabia ; Ghogho, M. ; Swami, A.

In densely deployed sensor networks, correlation among measurements may be high. Spatial sampling through node selection is usually used to minimize this correlation and to save energy consumption. However because of the fading nature of the wireless channels, extra care should be taken when performing this sampling. In this paper, we develop expressions for the distortion which include the channel effects. The asymptotic behavior of the distortion as the number of sensors or total transmit power increase without bound is also investigated. Further, based on the channel and position information we propose and test several node selection schemes.

Published in:

Signal Processing Advances in Wireless Communications (SPAWC), 2010 IEEE Eleventh International Workshop on

Date of Conference:

20-23 June 2010