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Restricted by data transfer speed and bandwidth, underwater data fusion is far away from applications. A design for underwater data fusion is proposed in this paper. In order to reduce the difficulties of time-space normalization, data fusion is operated in a mono-platform, e.g. Autonomous Underwater Vehicle (AUV). Aiming at improving detection performance of AUV, the data from a bow array and a side...
A sidelobe suppression algorithm based on compressive sensing (CS) theory for stepped-frequency continuous wave ground penetrating radar (SFCW GPR) is proposed. Due to sparse nature of the amplitude and time delay of signals reflected from underground layers and buried objects, an L1-norm minimization regularization approach within the framework of CS is employed to reconstruct the super-resolution...
We theoretically study the stability of single-sideband-modulator based recirculating frequency shifter (RFS) used for Tb/s multi-carrier optical transmission, in the presence of modulator nonlinearity and optical amplifier noise. Optimum operation conditions are found for various scenarios.
Recently approved IEEE 802.15.4a standard defines an ultra-wideband (UWB) based physical layer technique, and performance analysis of UWB systems shows that the pulse waveform will affect the received SINR when multipath interference, multiple access interference and additive white Gaussian noise are considered. In order to obtain an optimal pulse waveform in UWB based wireless sensor networks, the...
The combination of ultra-wideband technique and cooperative technique can improve the performance of ultra-wideband communications effectively and reduce the power consumption. In order to improve the system performance as well as reduce the hardware cost, a cooperative ultra-wideband system model using transmitted reference receiver and decode-and-forward (DF) relay protocol is proposed, and normalized...
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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