Receiver Diversity for Distributed Detection in Wireless Sensor Networks

Mohammad A. Al-Jarrah and Mohammad M. Al-Ibrahim
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Mohammad A. Al-Jarrah: Jordan University of Science and Technology, Jordan
Mohammad M. Al-Ibrahim: Jordan University of Science and Technology, Jordan

International Journal of Wireless Networks and Broadband Technologies (IJWNBT), 2012, vol. 2, issue 1, 1-15

Abstract: In this paper, parallel distributed detection in wireless sensor network (WSN) is considered where the sensors process the observations to make local decisions and send these decisions to a central device called fusion center. Receiver diversity technique is proposed here for the distributed detection system in order to enhance the system reliability by improving the detection performance. The fusion center is assumed to be multiple antennas device in order to imply the idea of receiver diversity. Different combining schemes at the fusion center side are used to reduce the fading effects in the case of receiver diversity. Transmitter diversity is also considered in this paper. Cooperative sensors are assumed in order to obtain Alamouti space time block codes. Optimal and sub-optimal fusion rules are derived for each case study. Simulation results show the performance improvement obtained as compared to the conventional distributed detection system in which no diversity is used.

Date: 2012
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