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1. WO2020033006 - METHOD AND SYSTEM FOR DETERMINING AN UNAMBIGUOUS ANGLE OF ARRIVAL USING INTERFEROMETRY

Publication Number WO/2020/033006
Publication Date 13.02.2020
International Application No. PCT/US2019/018157
International Filing Date 15.02.2019
IPC
G01S 3/48 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
14Systems for determining direction or deviation from predetermined direction
46using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
48the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
G01S 3/50 2006.01
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
14Systems for determining direction or deviation from predetermined direction
46using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
50the waves arriving at the antennas being pulse modulated and the time difference of their arrival being measured
CPC
G01S 3/043
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
04Details
043Receivers
G01S 3/06
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
04Details
06Means for increasing effective directivity, e.g. by combining signals having differently oriented directivity characteristics or by sharpening the envelope waveform of the signal derived from a rotating or oscillating beam antenna
G01S 3/48
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
14Systems for determining direction or deviation from predetermined direction
46using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
48the waves arriving at the antennas being continuous or intermittent and the phase difference of signals derived therefrom being measured
G01S 3/50
GPHYSICS
01MEASURING; TESTING
SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
3Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
02using radio waves
14Systems for determining direction or deviation from predetermined direction
46using antennas spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
50the waves arriving at the antennas being pulse modulated and the time difference of their arrival being measured
Applicants
  • RAYTHEON COMPANY [US]/[US]
Inventors
  • ROBINSON, Ian S.
  • FLANDERS, Bradley A.
Agents
  • MARAIA, Joseph M.
  • CHACLAS, George N.
  • COHEN, Jerry
  • COWLES, Christopher R.
  • EMMONS, Richard B.
  • FOLEY, Shawn P.
  • GOLDMAN, Gabriel
  • GOMES, David W.
  • HASAN, Shahid
  • JOBSE, Bruce D.
  • LOPEZ, Orlando
  • CLARKE, Daniel W.
  • MCGRATH, Daniel
  • MILLS, Steven M.
  • MOORE, Ronda P.
  • QUINN, Joseph P.
  • SCHEPPER, Marlo M.
  • SERIO, John C.
  • SORKIN, Paul D.
  • SUSAN, Janine M.
Priority Data
15/978,71814.05.2018US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD AND SYSTEM FOR DETERMINING AN UNAMBIGUOUS ANGLE OF ARRIVAL USING INTERFEROMETRY
(FR) PROCÉDÉ ET SYSTÈME DE DÉTERMINATION D'UN ANGLE D'ARRIVÉE NON AMBIGU PAR INTERFÉROMÉTRIE
Abstract
(EN)
A direction finding interferometer shares receivers among antennas (204-1, 204-2, 204-3, 204-4) and aperiodically switches between those antennas. The phase differences for a subset of the antenna pairs are measured for each pulse and the results are combined with the results from subsequent pulses to resolve ambiguities. An angle of arrival common to two subsets of angles of arrival (516) is the unambiguous angle of arrival.
(FR)
Un interféromètre de recherche de direction partage des récepteurs parmi des antennes et effectue une commutation apériodique entre ces antennes. Les différences de phase pour un sous-ensemble des paires d'antennes sont mesurées pour chaque impulsion et les résultats sont combinés aux résultats d'impulsions subséquentes pour résoudre des ambiguïtés. Un angle d'arrivée commun à deux sous-ensembles d'angles d'arrivée est l'angle d'arrivée non ambigu.
Also published as
Latest bibliographic data on file with the International Bureau