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公开(公告)号：US11644532B2
公开(公告)日：2023-05-09
申请号：US16836048
申请日：2020-03-31
Applicant: THALES
Inventor： Nicolas Porez , Pascal Cornic , Patrick Garrec
CPC classification number: G01S7/025 , G01S7/282 , G01S13/30 , G01S13/89 , H01Q9/0407 , H01Q21/065
Abstract: Method and device for radar transmission and reception by dynamic change of polarization notably for the implementation of interleaved radar modes are provided. A radar transmission-reception method and a device for implementing this method, the method alternatively implementing two modes of operation, a short range mode exploiting short pulses and a long range mode exploiting modulated long pulses, the method consisting, for each mode, in: producing two synchronous radiofrequency (RF) transmission signals having between them a phase-shift θ of controllable given value; radiating two radiofrequency waves, each corresponding to one of the transmission RF signals produced, by means of two colocated radiating sources each having a given polarization axis; handling the reception of the backscattered radiofrequency signals picked up by each of the radiating sources, and delivering two radiofrequency (RF) reception signals each corresponding to a radiofrequency signal picked up by one of the radiating sources, a phase-shift θ′ being applied between the two signals delivered, θ′ being able to be determined as being equal to θ.
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公开(公告)号：US11249166B2
公开(公告)日：2022-02-15
申请号：US16450645
申请日：2019-06-24
Applicant: THALES
Inventor： Pascal Cornic , Nicolas Porez , Patrick Garrec
Abstract: The invention relates to a method for determining an angle of arrival of a received radioelectric signal implemented by a receiving antenna system including either one rotating antenna having at least two receiving channels, or two rotating antennas with a same speed each having a receiving channel, and having different antenna diagrams. The method includes calculating and storing a series of ambiguous angle error measurement values obtained from receiving amplitude values of a radioelectric signal coming from an emitting source on said first and second receiving channels, calculating a convolution function on said angular range tween said series of ambiguous angle error measurement values and a series of theoretical angle error measurement values of said receiving channels previously calculated and stored, and determining an angle of arrival of said received radioelectric signal as a function of an estimate of a maximum of said calculated convolution function.
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公开(公告)号：US11686812B2
公开(公告)日：2023-06-27
申请号：US16703810
申请日：2019-12-04
Applicant: THALES
Inventor： Pascal Cornic , Patrick Garrec , Nicolas Porez
Abstract: A method for confusing the electronic signature of a signal transmitted by a radar, includes the generation by the radar of at least one pulse, wherein the method comprises a step of modulation, in the pulse, of the polarization of the transmitted signal, according to two orthogonal or opposite polarizations, the modulation of the polarization being performed according to a predetermined modulation code.
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公开(公告)号：US20190391225A1
公开(公告)日：2019-12-26
申请号：US16450645
申请日：2019-06-24
Applicant: THALES
Inventor： Pascal CORNIC , Nicolas Porez , Patrick Garrec
Abstract: The invention relates to a method for determining an angle of arrival of a received radioelectric signal implemented by a receiving antenna system including either one rotating antenna having at least two receiving channels, or two rotating antennas with a same speed each having a receiving channel, and having different antenna diagrams. The method includes, in the operational phase, the following calculating and storing a series of ambiguous angle error measurement values obtained from receiving amplitude values of a radioelectric signal coming from an emitting source on said first and second receiving channels, each angle error measurement value being representative of a ratio between receiving amplitude values on said first and second receiving channels, and corresponding to an angular deviation relative to a reference angular value; calculating a convolution function on said angular range tween said series of ambiguous angle error measurement values and a series of theoretical angle error measurement values of said receiving channels previously calculated and stored, determining an angle of arrival of said received radioelectric signal as a function of an estimate of a maximum of said calculated convolution function.
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