A maximum a posteriori approach to the restoration of randomly distorted signals

Author

Guan, Ling ; Ward, Rabab K.

Author_Institution

Dept. of Electr. Eng., British Columbia Univ., Vancouver, BC, Canada

fYear

1988

fDate

11-14 Apr 1988

Firstpage

1770

Abstract

A maximum a posterior (MAP) approach to the restoration of randomly distorted signals is introduced. Since random distortion is due to the uncertainty in the impulse response of the physical system, it cannot be modelled as additive. The theoretical derivation of the MAP filter shows that it is necessary to solve a nonlinear optimization problem. The performance of the method is compared to that of a modified Wiener filter, and a numerical example shows that the MAP filter outperforms the modified Wiener filter

Keywords

filtering and prediction theory; optimisation; signal processing; MAP filter; impulse response; modified Wiener filter; nonlinear optimization problem; physical system; randomly distorted signals restoration; uncertainty; Additive noise; Atmosphere; Dispersion; Fluctuations; Nonlinear distortion; Signal processing; Signal restoration; Uncertainty; Underwater communication; Wiener filter;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Conference_Location

New York, NY

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1988.196962

Filename

196962

Link To Document

https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3004200