Guo, Xiaoxi and He, Yuanyuan and Atapattu, Saman and Dey, Subhrakanti and Evans, Jamie S. (2018) Power Allocation for Distributed Detection Systems in Wireless Sensor Networks With Limited Fusion Center Feedback. IEEE Transactions on Communications, 66 (10). pp. 4753-4766. ISSN 0090-6778

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Abstract

We consider a distributed detection system for a wireless sensor network over slow-fading channels. Each sensor only has knowledge of quantized channel state information (CSI) which is received from the fusion center via a limited feedback channel. We then consider transmit power allocation at each sensor inorder to maximize a J-divergence based detection metric subject to a total and individual transmit power constraints. Our aim is to jointly design the quantization regions of all sensors CSI and the corresponding power allocations. A locally optimum solution is obtained by applying the generalized Lloyd algorithm (GLA). To overcome the high computational complexity of the GLA, we then propose a low-complexity nearoptimal scheme which performs very close to its GLA based counterpart. This enables us to explicitly formulate the problem and to find the unique solution despite the non-convexity of the optimization problem. An asymptotic analysis is also provided when the number of feedback bits becomes large. Numerical results illustrate that only a small amount of feedback is needed to achieve a detection performance close to the full CSI case.

Item Type:	Article
Keywords:	Power Allocation; Distributed Detection Systems; Wireless Sensor Networks; Limited Fusion Center Feedback;
Academic Unit:	Faculty of Science and Engineering > Electronic Engineering
Item ID:	12696
Identification Number:	https://doi.org/10.1109/TCOMM.2018.2837101
Depositing User:	Subhrakanti Dey
Date Deposited:	02 Apr 2020 10:56
Journal or Publication Title:	IEEE Transactions on Communications
Publisher:	IEEE
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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