公开(公告)号：US10012727B2

公开(公告)日：2018-07-03

申请号：US15021904

申请日：2014-09-18

Applicant: THALES

Inventor： Cyrille Enderli ,  Jean-Yves Delabbaye

IPC: G01S13/87 ,  G01S13/04 ,  G01S13/02

CPC classification number: G01S13/87 ,  G01S13/04 ,  G01S2013/0245 ,  G01S2013/0272

Abstract: A method for detecting targets, implemented by a multifunction radar wherein the radar comprises an antenna subdivided into at least two portions and is configured to transmit at least two types of signals on distinct frequency bands and to perform at least one ground detection or imaging function. During the transmission phases of an antenna portion, the reception of each antenna portion of the radar is cut. The method comprises, for each range gate, a step of reception of signals, a step of estimation of the autocorrelation matrix associated with the interferences the ground returns and from the thermal noise of the radar and a step of target detection using a test of the generalized maximum likelihood. A multifunction radar configured to implement the method for detecting targets is provided.

公开(公告)号：US09800317B2

公开(公告)日：2017-10-24

申请号：US14912037

申请日：2014-08-13

Applicant: THALES

Inventor： Anne Le Meur ,  Jean-Yves Delabbaye

IPC: H04B7/08 ,  H04B1/16

CPC classification number: H04B7/0894 ,  H04B1/16

Abstract: A method for detecting an electromagnetic signal by an antenna array with pattern diversity and a device for implementing this method is provided. The method according to the invention requires no prior knowledge of the type of signal and can be implanted on an antenna array with pattern diversity.

公开(公告)号：US10560073B2

公开(公告)日：2020-02-11

申请号：US15539386

申请日：2015-12-23

Applicant: THALES

Inventor： Anne Le Meur ,  Jean-Yves Delabbaye

IPC: H03H17/02 ,  G06F17/18 ,  G06K9/62 ,  G06F17/14 ,  G06F17/16 ,  G01S3/74

Abstract: This method for the non-linear estimation of no more than two mixed signals from separate sources, the time/frequency representation of which shows an unknown non-zero proportion of zero components, using an array made up of P>2 antennas, when the directional vectors U and V of the sources emitting these signals are additionally known or estimated, includes the following steps: a) Calculating the successive discrete Fourier transforms of the signal received by the antennas and sampled to obtain a time-frequency P-vector grid of the signal; each element of the grid being referred to as a box and containing a complex vector X forming a measurement; b) For each box, calculating the conditional expectation estimator of the signal, or of the signals, from the measurement X and an a priori probability density for the signals that is a Gaussian mixture.

公开(公告)号：US10254394B2

公开(公告)日：2019-04-09

申请号：US15506655

申请日：2015-09-04

Applicant: THALES

Inventor： Jean-Marie Lemoine ,  Jean-Yves Delabbaye ,  Claude Jousselin

IPC: G01S13/72 ,  G01S15/66 ,  G01S17/66

Abstract: A method for managing track crossovers and a device for tracking mobile objects that is suitable for implementing the method are provided. The method for managing track crossovers comprises, for each track at a given time, a step Stp1 of testing in order to determine whether the track in question is ambiguous or not at the given time and, if the track is ambiguous, a step Stp2 of specific processing of the estimate of the track.

公开(公告)号：US09660715B2

公开(公告)日：2017-05-23

申请号：US14912028

申请日：2014-08-13

Applicant: THALES

Inventor： Anne Le Meur ,  Jean-Yves Delabbaye ,  Luc Bosser

IPC: H04L27/06 ,  H04B7/08 ,  H04B1/16

CPC classification number: H04B7/0894 ,  H04B1/16

Abstract: A method for detecting an electromagnetic signal comprises: applying to the received electromagnetic signal a plurality of time-frequency transforms, for each time/frequency cell of a given set of cells, calculating the energy of the vector made up of the spectra over all of the antenna elements, applying the following nonlinear function T to the result of the energy calculation: if the norm of the energy is below a first predetermined threshold s, the result of the function T is zero, if the norm of the energy is above or equal to the first threshold s, the result of the function T is equal to the norm of the energy minus the value of the first threshold s, integrating, over the set of time/frequency cells, the result of the nonlinear function T, comparing the result of the integration to a second predetermined threshold, to detect the presence of the signal.

公开(公告)号：US09991919B2

公开(公告)日：2018-06-05

申请号：US15303723

申请日：2015-04-10

Applicant: THALES

Inventor： Anne Le Meur ,  Jean-Yves Delabbaye

IPC: H04L27/06 ,  H04B1/26 ,  G06F17/18 ,  H04B1/719 ,  H04B7/08 ,  G01S7/02 ,  G06F17/14

CPC classification number: H04B1/26 ,  G01S7/021 ,  G06F17/141 ,  G06F17/18 ,  H04B1/719 ,  H04B7/0848

Abstract: A passive detection method implemented by a device comprising one or more sensors comprises a step of sampling signals received by each sensor using various sub-Nyquist sampling frequency values, a step of transforming the sampled signals to the frequency domain by discrete Fourier transform, the frequency pitch ΔF being chosen constant, and, for each time/frequency box, a step of calculating the normalized power in each reception channel, a step of calculating the quadratic sum of the calculated powers while taking into account the power of a possible parasitic signal, and a thresholding step carried out so as to ensure a given probability of false alarm.

公开(公告)号：US20160197664A1

公开(公告)日：2016-07-07

申请号：US14912028

申请日：2014-08-13

Applicant: THALES

Inventor： Anne Le Meur ,  Jean-Yves Delabbaye ,  Luc Bosser

IPC: H04B7/08 ,  H04B1/16

CPC classification number: H04B7/0894 ,  H04B1/16

Abstract: A method for detecting an electromagnetic signal comprises: applying to the received electromagnetic signal a plurality of time-frequency transforms, for each time/frequency cell of a given set of cells, calculating the energy of the vector made up of the spectra over all of the antenna elements, applying the following nonlinear function T to the result of the energy calculation: if the norm of the energy is below a first predetermined threshold s, the result of the function T is zero, if the norm of the energy is above or equal to the first threshold s, the result of the function T is equal to the norm of the energy minus the value of the first threshold s, integrating, over the set of time/frequency cells, the result of the nonlinear function T, comparing the result of the integration to a second predetermined threshold, to detect the presence of the signal.

Abstract translation: 一种用于检测电磁信号的方法包括：对于给定的一组单元的每个时间/频率单元，对所接收的电磁信号应用多个时频变换，计算由所有的频谱组成的矢量的能量 天线元件，将以下非线性函数T应用于能量计算的结果：如果能量范数低于第一预定阈值s，则函数T的结果为零，如果能量的范数高于或等于 等于第一阈值s，函数T的结果等于能量的范数减去第一阈值s的值，在时间/频率单元集合上积分非线性函数T的结果，比较 集成到第二预定阈值的结果，以检测信号的存在。