Title :
Channel-Aware Decision Fusion in Distributed MIMO Wireless Sensor Networks: Decode-and-Fuse vs. Decode-then-Fuse
Author :
Ciuonzo, Domenico ; Romano, Gianmarco ; Rossi, Pierluigi Salvo
Author_Institution :
Department of Information Engineering, Second University of Naples, via Roma, 29, 81031 Aversa (CE), Italy
fDate :
8/1/2012 12:00:00 AM
Abstract :
We study channel-aware binary-decision fusion over a shared Rayleigh flat-fading channel with multiple antennas at the Decision Fusion Center (DFC). We present the optimal rule and derive sub-optimal fusion rules, as alternatives with improved numerical stability, reduced complexity and lower system knowledge required. The set of rules is derived following both "Decode-and-Fuse" and "Decode-then-Fuse" approaches. Simulation results for performances are presented both under Neyman-Pearson and Bayesian frameworks. The effect of multiple antennas at the DFC for the presented rules is analyzed, showing corresponding benefits and limitations. Also, the effect on performances as a function of the number of sensors is studied under a total power constraint.
Keywords :
Antennas; Complexity theory; MIMO; Sensors; Signal to noise ratio; Vectors; Wireless sensor networks; Decision fusion; MIMO; distributed detection; wireless sensor networks;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2012.061912.112049