Communications: directive radio wave systems and devices (e.g. – Directive – Beacon or receiver
Patent
1999-04-07
2000-10-31
Hellner, Mark
Communications: directive radio wave systems and devices (e.g.,
Directive
Beacon or receiver
342362, G01S 504, H01Q 2106
Patent
active
061409634
ABSTRACT:
A method for resolving the angular ambiguity inherent in the differential phase measurements of a source of electromagnetic signal by an interferometric system of antenna elements. Three or more independent differential phase measurements are acquired between predetermined pairs of antenna elements. The ambiguous solutions to each of the differential phase measurements are represented as a group of equally-spaced, parallel lines. The points of intersection between two groups of lines represent ambiguous solutions to the system of equations from which the true angles-of-arrival may be determined. The set of ambiguous solutions is evaluated using the remaining differential phase measurements. The most probable solution to the system of equations is determined by minimizing cost functions with the following embodiments: tightest cluster of intersecting lines; maximum likelihood estimation; and voltage reconstruction comparisons with measured voltages.
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Azzarelli Teodoro
Kwon Paul
Mendelovicz Ephraim
Brooks Michael Blaine
Hellner Mark
Science and Applied Technology, Inc.
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