Fusion of decisions transmitted over fading channels in wireless sensor networks
- 31 October 2003
- conference paper
- Published by Institute of Electrical and Electronics Engineers (IEEE)
- Vol. 2 (10586393) , 1184-1188
- https://doi.org/10.1109/acssc.2002.1196970
Abstract
Information fusion by utilizing multiple distributed sensors is studied. We derive the optimal likelihood based fusion statistic for a parallel decision fusion problem with fading channel assumption. This optimum fusion rule, however, requires perfect knowledge of the local decision performance indices as well as the fading channel. Several alternatives are presented that alleviate these requirements. At low SNR, the likelihood based fusion rule reduces to a form analogous to a maximum ratio combining statistic; while at high SNR, it leads to a two-stage approach using the well known Chair-Varshney fusion rule. A third alternative, in the form of an equal gain combiner, is also proposed; it requires the least amount of information regarding the sensor/channel. Simulation shows that the two-stage approach, which considers the communication and decision fusion as two independent stages, suffers performance loss compared with the other two alternatives for a practical SNR range.Keywords
This publication has 12 references indexed in Scilit:
- Optimal bandwidth assignment for distributed sequential detectionPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- A Bayesian sampling approach to decision fusion using hierarchical modelsIEEE Transactions on Signal Processing, 2002
- Collaborative signal and information processing in microsensor networksIEEE Signal Processing Magazine, 2002
- Elements of Information TheoryPublished by Wiley ,2001
- Decentralised detection strategies under communication constraintsIEE Proceedings - Radar, Sonar and Navigation, 1998
- Distributed Detection and Data FusionPublished by Springer Nature ,1997
- Distributed decision fusion in the presence of networking delays and channel errorsInformation Sciences, 1992
- Optimal data fusion of correlated local decisions in multiple sensor detection systemsIEEE Transactions on Aerospace and Electronic Systems, 1992
- Optimum multisensor fusion of correlated local decisionsIEEE Transactions on Aerospace and Electronic Systems, 1991
- Optimal Data Fusion in Multiple Sensor Detection SystemsIEEE Transactions on Aerospace and Electronic Systems, 1986