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A design for underwater network management is proposed in this paper. The underwater network is a tree-shaped construction and has several sub-networks. Being a hierarchy network, every sub-network has a center node that is the gateway of the network, and the sonobuoy is played as center node. Autonomous Underwater Vehicles (AUVs) are the common nodes, and equipped with sonar and underwater acoustic...
In cooperative spectrum sensing, the detection performance is affected seriously by the error of channel estimation. Hence, the accurate channel estimation is very necessary. In this paper, the performance of cooperative spectrum sensing under the LMMSE channel estimation method with time-domain windowing technique is analyzed. Simulation results show that the probability of detection can reach high...
Recently proposed cooperative spectrum sensing method suggests that Cognitive Radio (CR) users can detect the primary users at low SNR with less time and higher accuracy through user cooperation. However, previous works assume CR users can acquire fully channel state information by pilot symbols, which is impractical. In this paper, the performance with imperfect channel estimation in cooperative...
Acoustic signal processing in shallow water environments is a challenging problem because of the presence of reverberation. Based on some models of reverberation, data from sensors array is pretreated to suppress reverberation. Considering reverberation as a sum of echoes of transmitted signal, the principal component inverse (PCI) algorithm is operated by deleting the largest singulars of data matrix,...
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