[12] Patent
[11] Patent No.:GC0011498  
[45] Date of Publishing the Grant of the Patent: 30/Nov /2020                76/2020  
Number of the Decision to Grant the Patent:2020/175223
Date of the Decision to Grant the Patent:22/Nov/2020

[21] Application No.:GC 2018-34757

[22] Filing Date:13/2/2018

[30] Priority:

[33] State [32] Priority date [31] Priority No.
US
20/4/2017
15/492,694

[72] Inventors:1- Ian S. RobinsonŲŒ2- Bradley A. FlandersŲŒ3- Daniel Kilfoyle

[73] Owner: Raytheon Company, 870Winter Street, Waltham, Massachusetts 02451-1449, USA, Waltham, USA

[74] Agent: Saba & Co. T.M.P

  

 

  

[51]IPC:
Int. Cl.: H04B 1/10 (2006.01)

[56] Cited Documents:

-US-20180172794-A1 Rossman; Court E. June-2018
-US-20100007555-A1 Ezal; Kenan 0. January-2010
-US-20060087475-A1 Struckman; Keith A. April-2006
 
Examiner: Eng. Saleh M. AlAqil

[54] INTERFEROMETRIC TIME DELAY OF ARRIVAL
[57] Abstract: Systems and methods for determining an angle of arrival (AoA) of a signal received from an emitters at a pair of antennas spaced apart by more than one half wavelength of the received signal. Features of the signal are determined, including a phase difference between signal components detected at the antennas, and a time difference of arrival (TDOA) having a known measurement error. A set of TDOA possibilities bounded by the known TDOA measurement error and a set of AoA estimates using phase interferometry (PI) within the range are calculated. The TDOA set is iteratively reduced to determine a precise AoA estimate for the emitter.
No. of claims: 21     No. of figures: 8


 

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