An analysis of the IIR an FIR Wiener filters with applications to underwater acoustics
Ruiz Fontes, Natanael
Therrien, Charles W.
Atchley, Anthony A.
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A detailed analysis of the performance the Wiener optimal filter for estimating a signal in additive noise is carried out. A first order AR model is assumed for both the signal and noise. Both IIR and FIR forms of the filter are considered and expressions are derived for the processing gain, mean square error and signal distortion. These measures are plotted as a function of the model parameters. This analysis motivates a generalized form of the Wiener filter, which can improve the signal distortion. An analysis of this more general filter is then carried out. A practical noise removal algorithm based on short time filtering using the generalized filter is also described, and results of applying the algorithm to some typical underwater acoustic data are presented
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Fontes, N. Ruiz; Therrien, Charles W. (Monterey, California. Naval Postgraduate School, 1997-08); NPS-EC-97-011This report provides a detailed analysis of the performance of the Wiener optimal filter for estimating a signal in additive noise. Both IIR and FIR forms of the filter are considered using a first order AR model for ...
Agrawal, Brij N.; Sugathevan, Suranthiran (The United States of America as represented by the Secretary of the Navy, Washington, DC (US), 2011-09-13);Noise effects in a signal for driving a plant are reduced by generating a reference signal from the error signal. A signal generator generates a reference signal for input to a finite impulse response (FIR) filter. The ...
Kuchler, Ryan J. (Monterey California. Naval Postgraduate School, 2002-06);In this thesis, underwater acoustic communications signal processing techniques, which are used to equalize the distortional effects associated with the ocean as a communications channel, are investigated for a shallow ...