A spread spectrum communication technique

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Authors
Cocci, James Alfred.
Subjects
Spread spectrum communications
Covert communications
Acoustic surface devices
Golay complementary sequences
PCM synchronization
Audio transceiver
MODEM
Advisors
Jauregui, Stephen, Jr.
Date of Issue
1973-09
Date
September 1973
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
A practical solution to the problem of realizing a signal processing method for a covert voice communications system was the objective of the thesis. Spread spectrum technology in the form of Golay complimentary sequences implemented with acoustic surface wave devices was utilized to achieve this processing. The resultant device was an audio transceiver MODEM in which a specially coded form of pulse code modulation (PCM) was applied to a voice signal to enable application of the spread spectrum concept. The techniques exploited spread the 3 KHz voice modulation over a one MHZ bandwidth. A method of PCM synchronization with a minimum of data loss and a minimum amount of actual hardware. Highly involved theoretical analysis was de-emphasized in the thesis in order that engineering requirements could be satisfied in the working device that resulted.
Type
Thesis
Description
Series/Report No
Department
Department of Electronics Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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