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|Title:||Optimal power allocation for wireless sensor networks with outage constraint||Authors:||Huang, C.
Wireless sensor networks
|Issue Date:||2014||Citation:||Huang, C., Zhang, R., Cui, S. (2014). Optimal power allocation for wireless sensor networks with outage constraint. IEEE Wireless Communications Letters 3 (2) : 209-212. ScholarBank@NUS Repository. https://doi.org/10.1109/WCL.2014.012914.130840||Abstract:||This letter considers the power allocation problem for a wireless sensor network, where N distributed sensors transmit delay-limited high rate traffic to a fusion center (FC) via orthogonal channels. The system-level outage event is defined as that the FC can decode none of the messages from the N sensors. We formulate the outage probability minimization problem with a sum power constraint, and show that this problem, albeit being non-convex, possesses an interesting «concave-convex» property in the reformulated form. By exploiting this property, the problem is shown to be solvable optimally via a one-dimension search. Its counterpart problem, i.e., minimizing the sum power consumption with a targeted outage probability, is also solved. Finally, numerical results show that the proposed power allocation can significantly improve the system performance compared to the conventional uniform power allocation. © 2012 IEEE.||Source Title:||IEEE Wireless Communications Letters||URI:||http://scholarbank.nus.edu.sg/handle/10635/82840||ISSN:||21622345||DOI:||10.1109/WCL.2014.012914.130840|
|Appears in Collections:||Staff Publications|
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