Wideband direction finding using a photonic robust symmetrical number system technique
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Authors
Tedesso, Thomas W.
Calusdian, James
Sewing, Carsten
Pace, Phillip E.
Subjects
Photonics
Mach-Zehnder modulator
Direction finding
Robust symmetrical number system
Electronic warfare
Mach-Zehnder modulator
Direction finding
Robust symmetrical number system
Electronic warfare
Advisors
Date of Issue
2014
Date
Publisher
SPIE
Language
Abstract
Dual electrode Mach–Zehnder modulators (DE-MZMs) are used to conduct phase detection for direct
wideband direction finding (DF) of microwave signals. It is demonstrated theoretically and through simulation and experimentation that the normalized magnitude of the output signal phase detector circuit is equal to |sin (ψ∕2), where ψ is the phase difference between the plane waves arriving at the reference and measurement antennas of a linear DF array. A four-element wideband photonic DF system with robust symmetrical number system preprocessing is presented. Simulation and experimental testing results are provided to demonstrate the theoretical concept. The results demonstrate a direct DF receiver using DE-MZMs that achieves fine angular resolution using a much smaller array size than is typically required for linear arrays employing super-resolution.
Type
Article
Description
The article of record as published may be found at http://dx.doi.org/10.1117/1.OE.53.11.114109
Series/Report No
Department
Electrical and Computer Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funder
Format
14 p.
Citation
T.W. Tedesso, J. Calusdian, C. Sewing, P.E. Pace, "Wideband direction finding using a photonic robust symmetrical number system technique," Optical Engineering, v. 53, no.11, (Novermber 2014), 14 p.
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.