Resolving angular ambiguity

Details Resolving angular ambiguity Resolving angular ambiguity

G - Physics

01

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343/112

G01S 3/46 (2006.01) G01S 3/48 (2006.01) G01S 5/02 (2006.01)

Patent

CA 1099007

PHB 32,541 ABSTRACT A radio interferometer system for determining the angle of incidence of signals received from a remote radio source comprises a substantially linear series of n + 1 (n ? 2) aerial elements. The two outermost aerial elements form a first pair to which a digital phase discrimator is coupled to measure accurately but ambiguously a first phase difference between sig- nals received by this first pair. Digital logic means are used to resolve the ambiguity of this first phase difference measure- ment to produce an accurate and unambiguous measurement with means connected to the digital logic means to produce an in- dication of the angle to be determined. Each two successive aerial elements form successive further pairs to which further digital phase discriminators are coupled to measure unambiguously further phase differences between the signal received by these further pairs. Digital logic means are arranged to add these unambiguously measured further phase differences to produce a sum and to compare this sum with the ambiguous first phase dif- ference measurement to produce the accurate and unambiguous measurement.

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