Method and System for Robust Symmetrical Number System Photonic Direction Finding
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Authors
Pace, Phillip E.
Tedesso, Thomas W.
Calusdian, James
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Date of Issue
2017-03-07
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United States Patent and Trademark Office (USPTO)
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Abstract
A four-element wideband photonic DF system with robust symmetrical number system preprocessing utilizes dual electrode Mach-Zehnder modulators (DE-MZMs) to conduct phase detection for direct wideband direction finding (DF) of RF signals, such as microwave signals, in which the normalized magnitude of the output signal phase detector circuit is equal to lsin(cp/2)1 where cjJ is the phase difference between the plane waves arriving at the reference and measurement antennas of a linear DF array. The method and system allow fine angular resolution using a much smaller array size than is typically required for linear arrays employing super-resolution signal processing techniques.
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Patent
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Identifiers
US 9,590,740 B1
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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.