资源受限的无线传感器网络基于衰减信道的决策融合 - CiteSeerX.PDF

ISSN 1000-9825, CODEN RUXUEW E-mail: jos@ Journal of Software, Vol.18, No.5, May 2007, pp .1130− 1137 http://www.j DOI: 10. 1360/jos1 81130 Tel/Fax : +86-10 © 2007 by Journal of Software. All rights reserved. ∗ 资源受限的无线传感器网络基于衰减信道的决策融合 + 李燕君, 王 智 , 孙优贤 (工业控制技术国家重点实验室(浙江大学),浙江 杭州 310027) Decision Fusion Under Fading Channel in Resource-Constrained Wireless Sensor Networks + LI Yan-Jun, WANG Zhi , SUN You-Xian (State Key Laboratory of Industrial Control Technology (Zhejia ng University), Hangzhou 310027, China) + Corresponding author: Phn: +86-571 E-mail: wangzhi@, Li YJ, Wang Z, Sun YX. Decision fusion under fading channel in resource-constrained wireless sensor networks. Journal of Software, 2007,18(5):1130−1137. /1000-9825/18/1130.htm Abstract: Decision fusion rules under fading channel in wireless sensor networks are investigated in this paper. Local decisions made by local sensor nodes may be lost or corrupted while transmitted to the fusion center via a fading channel. A series of fusion rules are proposed under the assumption of Rayleigh channel model. Likelihood ratio rule has been shown optimal through theoretical analysis and simulation. However, it consumes system resource and requires good knowledge of local and channel information, which is not easily available in resource-constrained sensor networks. Three sub-optimal alternatives are proposed, which have less computation and information cost. They perform well in their respective SNR (signal-to-noise ratio) range. Finally, it is found that