The characteristics of the underwater acoustic channel present special problems in the design of covert communication systems. In this paper we consider communications at relatively short distances, less than 20.000 yds., and well below the water surface. Covertness is measured in terms of the parameter d associated with the interceptor receiver operating characteristic and curves are given that relate d to the distance ratio between intercepter and receiver. The results clearly show the dominance of the channel characteristics over spreading techniques. Systems can be easily made very covert if the interceptor is further from the source than the receiver but are almost impossible if the interceptor is inside the receiver.


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    Title :

    LPI techniques in the underwater acoustic channel


    Additional title:

    LPI-Techniken im unterwasser-akustischen Kanal


    Contributors:
    Park, J.H. (author)


    Publication date :

    1986


    Size :

    5 Seiten, 8 Bilder, 1 Tabelle, 5 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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