Theory and performance of a matched-filter doppler direction-finding system
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Authors
Myers, Glen A.
Orejuela, Henry
Subjects
direction finding
matched filter processing
doppler direction finding
circular arrays
signal processing antennas
matched filter processing
doppler direction finding
circular arrays
signal processing antennas
Advisors
Date of Issue
1970-09
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
Abstract
A new radio direction-finding (DF) technique which applies matched-filter theory to the DF problem is presented. The new technique, called Matched-Filter Doppler Direction Finding (MFD DF) is based on the doppler DF principle in which a rotating antenna, or its equivalent, superimposes periodic frequency modulation on the received carrier. The phase of the induced modulation contains information on the angle of arrival. It is shown that a bandpass filtering operation, which satisfies the phase-matching requirement of a matched filter, converts the frequency-modulated signal to an amplitude-modulated signal whose envelope is a periodic narrow pulse with no sidelobes. The relative time of occurrence of the pulse is a measure of angle of arrival. Included is the description of and results obtained with an experimental system used to confirm the analytical results, to study the effects of noise, and to explore alternatives available in the design of an operating system. Encouraging results were obtained using this same experimental system with a conventional operating doppler DF set. (Author)
Type
Technical Report
Description
Series/Report No
Department
Electrical Engineering
Organization
Identifiers
NPS Report Number
NPS-52MV70091A
Sponsors
This task was supported by: Naval Ship Systems Command (Code 6050)
Funding
Format
Citation
Distribution Statement
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.