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Optical Engineering

Wideband direction finding using a photonic robust symmetrical number system technique
Author(s): Thomas W. Tedesso; James Calusdian; Carsten Sewing; Phillip E. Pace
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Paper 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.

Paper Details

Date Published: 21 November 2014
PDF: 13 pages
Opt. Eng. 53(11) 114109 doi: 10.1117/1.OE.53.11.114109
Published in: Optical Engineering Volume 53, Issue 11
Show Author Affiliations
Thomas W. Tedesso, United States Naval Academy (United States)
James Calusdian, Naval Postgraduate School (United States)
Carsten Sewing, Naval Postgraduate School (United States)
Phillip E. Pace, Naval Postgraduate School (United States)

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