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Title:An Evaluation of Various Equalization and Decoding Techniques for the Acoustic Underwater Communications Channel
Author(s):Sivaji, Vishnu
Contributor(s):Singer, Andrew C.
Subject(s):underwater communications
acoustic underwater communications
equalization
decoding
turbo-equalization
Abstract:The characteristics of the underwater acoustic communications channel compromise the performance of conventional equalization and decoding techniques. Such characteristics include the Doppler fading and spread of the channel and a large delay spread which leads to a longer reverberation time, resulting in channel lengths that are relatively greater than those of wireless radio (electromagnetic) channels. Conventional adaptive algorithms have been applied to equalized data. However this study also examines how interactive turbo-equalization works for underwater channels. Previous equalizers perform the equalization and the decoding separately, while turbo-equalization methods perform both operations at the same time. The experimental data is obtained from experiments conducted at Martha's Vineyard Coastal Laboratory in Edgartown, Massachusetts.
Issue Date:2009-05
Genre:Other
Type:Text
Language:English
URI:http://hdl.handle.net/2142/47051
Publication Status:unpublished
Peer Reviewed:not peer reviewed
Date Available in IDEALS:2014-01-23


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