Title :
FM pulses separation for improving sub-bottom attenuation estimation
Author :
Quinquis, André ; Radoi, Emanuel ; Maroni, C.S.
Author_Institution :
EIA Dpt., ENSIETA, Brest, France
Abstract :
A new method is proposed to infer the attenuation properties of the seafloor from its response to the frequency modulated pulses emitted by the subbottom profiler. This method is based on the time-frequency separation of two chirps and the spectral ratio algorithm combined with a neural network to improve attenuation estimation for thin sediment layers
Keywords :
geophysical signal processing; geophysical techniques; neural nets; oceanographic techniques; seafloor phenomena; sediments; seismology; sonar signal processing; FM pulses separation; chirp; frequency modulated pulse; geophysical measurement technique; marine sediment; neural net; neural network; ocean bottom; seafloor geology; seismology; signal processing; sonar; spectral ratio algorithm; subbottom attenuation estimation; subbottom profiler; thin sediment layers; time-frequency separation; Acoustic propagation; Acoustic scattering; Attenuation; Chirp; Frequency estimation; Frequency modulation; Neural networks; Pulse modulation; Sea floor; Sediments;
Conference_Titel :
OCEANS '97. MTS/IEEE Conference Proceedings
Conference_Location :
Halifax, NS
Print_ISBN :
0-7803-4108-2
DOI :
10.1109/OCEANS.1997.624193
