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公开(公告)号：US20190204404A1
公开(公告)日：2019-07-04
申请号：US16232271
申请日：2018-12-26
Applicant: Elta Systems Ltd.
Inventor： Aharon RAZON , Moshe FIREAIZEN
IPC: G01S3/74
CPC classification number: G01S3/74 , G01S5/0221 , G01S5/06
Abstract: A method of estimating the location of a signal source comprises, by a processing unit: determining ΔΔφm,n which represents a difference between accumulated phases of signals, Sm and Sn, received by at least one pair of the receivers, determining a first estimate of the location of said signal source based on position data and ΔΔφm,n of at least one pair of receivers, said first estimate being associated with an accuracy area, determining data representative of difference in times of arrival of modulation patterns of the signals Sm, Sn, wherein said data comprise an ambiguity, and for said at least one pair of receivers, using at least said data representative of difference in times of arrival of the modulation patterns of the signals, ΔΔφm,n, and said accuracy area, to obtain second estimates ĉSrck of the source location, at least some of them being located within the accuracy area.
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2.发明公开公开(公告)号：US20240061097A1
公开(公告)日：2024-02-22
申请号：US18259337
申请日：2021-12-13
Applicant: Elta Systems Ltd.
Inventor： Moshe FIREAIZEN , Yiftah LIPKIN , Aharon RAZON , Michael ELMAKIAS
IPC: G01S13/76
CPC classification number: G01S13/765
Abstract: A navigation system comprising at least one terminal configured to at least once transmit, to a communicant, e.g. via n>=1 satellite/s, a request for a reply transmission and wherein the communicant, responsively, at least once transmits a response transmission to the terminal. The terminal measures the response transmission's time of arrival and/or round-trip time and determines a round-trip time characterizing the terminal's own communication, via each of the satellite/s, with the communicant, and/or the terminal's own range (aka distance) from each of the satellite/s. The terminal is configured to derive self-orientation data from at least said round-trip time and from internal delay data characterizing the at least one satellite and/or the communicant.
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公开(公告)号：US20240201305A1
公开(公告)日：2024-06-20
申请号：US18553302
申请日：2022-03-27
Applicant: Elta Systems Ltd.
Inventor： Moshe FIREAIZEN , Aharon RAZON
Abstract: A direction finder antenna system and method are described. The direction finder antenna system comprises a rotatable platform comprising at least two antenna units at selected distance between them, a motor configured for moving the rotatable platform at a motion pattern, and a signal collection circuit configured for receiving data on signal portions collected by said at least two antenna units with respect to different angular positions of said at least two antenna units. The signal collection circuit generates output data indicative of direction of origin of collected signal.
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公开(公告)号：US20210382129A1
公开(公告)日：2021-12-09
申请号：US17406383
申请日：2021-08-19
Applicant: Elta Systems Ltd.
Inventor： Aharon RAZON , Moshe FIREAIZEN
Abstract: A method of estimating the location of a signal source comprises, by a processing unit: determining ΔΔφm,n which represents a difference between accumulated phases of signals, Sm and Sn, received by at least one pair of the receivers, determining a first estimate of the location of said signal source based on position data and ΔΔφm,n of said at least one pair of receivers, said first estimate being associated with an accuracy area, determining data representative of difference in times of arrival of modulation patterns of the signals Sm, Sn, wherein said data comprise an ambiguity, and for said at least one pair of receivers, using at least said data representative of difference in times of arrival of the modulation patterns of the signals, ΔΔφm,n, and said accuracy area, to obtain second estimates êSrck of the source location, at least some of them being located within the accuracy area
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