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As a complement to classical sensors, Distributed Optical Fiber Sensors now play a prominent role in several engineering fields and act as an antenna array. Depending of the devices used (Raman, Rayleigh, or Brillouin scattering), measurement record depend on temperature, strain, or pressure profile. As the wanted signal is often hidden by noise and other undesired sources, we can express the problem...
Distributed optical fiber sensors have gained an increasingly prominent role in structural-health monitoring. These are composed of an optical fiber cable in which a light impulse is launched by an opto-electronic device. The scattered light is of interest in the spectral domain: the spontaneous Brillouin spectrum is centered on the Brillouin frequency, which is related to the local strain and temperature...
In multisensor signal processing (geophysics, underwater acoustic, etc.), the Singular Value Decomposition (SVD) is a useful tool to perform a separation of the initial dataset into two complementary subspaces. The SVD of the data matrix {x,i} provides two orthogonal matrices that convey information on propagation vectors and normalized wavelets. The constraint imposed by the orthogonality's condition...
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