Instrumentation, Techniques, and Measurement

Wideband direction finding using a photonic robust symmetrical number system technique

[+] Author Affiliations
Thomas W. Tedesso

United States Naval Academy, Department of Electrical and Computer Engineering, 105 Maryland Avenue, Mail Stop 14B, Annapolis, Maryland 21402, United States

James Calusdian

Naval Postgraduate School, Department of Electrical and Computer Engineering, 1 University Way, Monterey, California 93943, United States

Carsten Sewing

Naval Postgraduate School, Department of Electrical and Computer Engineering, 1 University Way, Monterey, California 93943, United States

Phillip E. Pace

Naval Postgraduate School, Department of Electrical and Computer Engineering, 1 University Way, Monterey, California 93943, United States

Opt. Eng. 53(11), 114109 (Nov 21, 2014). doi:10.1117/1.OE.53.11.114109
History: Received September 4, 2014; Accepted October 21, 2014
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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 signal processing techniques.

© 2014 Society of Photo-Optical Instrumentation Engineers

Citation

Thomas W. Tedesso ; James Calusdian ; Carsten Sewing and Phillip E. Pace
"Wideband direction finding using a photonic robust symmetrical number system technique", Opt. Eng. 53(11), 114109 (Nov 21, 2014). ; http://dx.doi.org/10.1117/1.OE.53.11.114109


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