A Spread Spectrum Communications Systems Utilizing an Umbrella Code.

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Abstract:

A pulse stuffing technique is used to eliminate the silent gaps in the transmission of a particular Spread Spectrum system. Unauthorized listeners now have more difficulty in recovering the message content. A two code device was built using both a pseudorandom maximal length code and a Golay complementary sequence code. The pseudorandom code was used for pulse stuffing an umbrella code and was discarded after a digital matched filter in the receiver. The Golay code was added with a Surface Acoustic Wave dispersive element and removed with a similar device used as a matched filter. Author

Author(s):
Jaques, James Alfred, Iii
Author Organization(s):
NAVAL POSTGRADUATE SCHOOL MONTEREY CALIF
Descriptive Note:
Master's thesis,
Pagination:
0089

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Subject Terms
Joint Capability Areas:
JCA_6_Net Centric; JCA_6.3.3_Spectrum Management
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*SPREAD SPECTRUM, *PULSE CODE MODULATION, DIGITAL SYSTEMS, SURFACE WAVES, ACOUSTIC WAVES, THESES, INFORMATION THEORY, MATCHED FILTERS, PSEUDO RANDOM SYSTEMS, DISPERSION RELATIONS, PULSE COMMUNICATIONS
Field(s)/Group(s):
Cybernetics, Non-Radio Communications
Keyword(s):
Pulse stuffing, Umbrella code, Golay code, Saw devices, Complementary sequences, Most Project 7, Most Project 7
Report Date:
1975 Dec 01