Publication:
Measured performance of a delay lock tracking loop when noise power exceeds signal power.

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Authors
Hanratty, Joseph Michael.
Subjects
Digital Data Communications
Non-coherent AM Demodulators
Low-probability-yintercept (LPI)
Anti-jamming (AJ)
Delay Lock Tracking Loop
Synchronization of receivers
Advisors
Myers, G.A.
Date of Issue
1982
Date
March 1982
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
In the communications area there is a general interest in recovering signals which are below the noise level. In the military this interest translates to low-probability-intercept (LPI) and anti-jam (AJ) communications systems. The receiver improves the signal -to-noise ratio so data can be reliably recovered. This improvement is usually accomplished by matched -filtering or by correlation. In this report correlation is used as a post-detection processing technique to derive a synchronous reference. The system considered in this experiment can operate noncoherently by means of a delay lock tracking loop at signal-tonoise ratios as small as -5.0 to -7.1 dB. Futhermore, synchronization is achieved while the received signal is being modulated by data- No preamble or other type of synchronization is required.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Other Units
Naval Postgraduate School
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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