公开(公告)号：US20140292575A1

公开(公告)日：2014-10-02

申请号：US14226019

申请日：2014-03-26

Applicant: THALES

Inventor： Nicolas Martin ,  Jean-Michel Perre ,  Vincent Chopard

IPC: G01S19/21

CPC classification number: G01S19/21 ,  G01S19/53

Abstract: Method for formation of a signals array from a receiver (20) of signals from a satellite navigation system in order to improve the resistance to scrambling or interference, the receiver (20) being equipped with an antenna (21) having several controlled reception pattern sensors, comprising a step consisting in determining the attitude of the antenna in a TGL reference frame centred on the receiver, by iterative determination of the attitude angles of the antenna yielding the maximum of the sum of the energies of the weighted sums of the signals received by the sensors at the output of the correlators of the processing channel respectively associated with the satellites, the weighting coefficients of the weighted sums being calculated from the attitude angles considered at each iteration and from the known positions of the satellites in the TGL reference frame.

Abstract translation: 用于从卫星导航系统的信号的接收器（20）形成信号阵列的方法，以便改善抵抗加扰或干扰的能力，所述接收机（20）配备有具有多个受控接收模式传感器的天线（21） ，包括以下步骤：通过迭代确定天线的姿态角，得到所接收的信号的加权和的总和的最大值的最大值，以确定天线在以接收机为中心的TGL参考帧中的姿态 分别与卫星相关联的处理通道的相关器的输出处的传感器，根据在每次迭代中考虑的姿态角度和TGL参考帧中的卫星的已知位置计算加权和的加权系数。

公开(公告)号：US20140091966A1

公开(公告)日：2014-04-03

申请号：US13847416

申请日：2013-03-19

Applicant: THALES

Inventor： Nicolas Martin ,  Vincent Chopard ,  David Depraz

IPC: G01S19/29

CPC classification number: G01S19/29 ,  G01S19/14 ,  G01S19/24 ,  G01S19/35

Abstract: The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier and in demodulating the signals received by each antenna separately. The diversity of the demodulation chains is utilized to compensate the signal loss on one of the chains when the corresponding antenna experiences a signal loss due to the masking of the satellite by the carrier.

Abstract translation: 本发明涉及一种用于接收包括形成天线阵列的多个接收天线的卫星无线电导航信号的装置。 本发明在于使用围绕载波的圆周设置的多个天线，并分别解调每个天线所接收的信号。 当相应的天线由于载波对卫星的掩蔽而经历信号丢失时，利用解调链的多样性来补偿一条链上的信号损耗。

公开(公告)号：US11762103B2

公开(公告)日：2023-09-19

申请号：US16993006

申请日：2020-08-13

Applicant: THALES

Inventor： Nicolas Martin ,  Denis Bouvet ,  Christian Mehlen

IPC: G01S19/23 ,  G01S19/30 ,  G01S19/39 ,  G01S19/24 ,  H04B1/7075 ,  G01S19/21

CPC classification number: G01S19/23 ,  G01S19/21 ,  G01S19/24 ,  G01S19/30 ,  G01S19/39 ,  H04B1/70752

Abstract: This detection method is carried out after a phase for acquiring a navigation signal during a convergence phase and comprises at least one of the following steps: —determining a plurality of pilot channel periodic correlations and a plurality of data channel periodic correlations, and determining a first value as a function of these periodic correlations; —determining a plurality of pilot channel partial correlations, and determining a second value as a function of these partial correlations; —determining a plurality of shifted pilot channel correlations, and determining a third value as a function of these shifted pilot channel correlations. The convergence phase further comprises the step for determining a wrong synchronization when at least one of the first value, the second value, and the third value exceeds a predetermined threshold.

公开(公告)号：US10386494B2

公开(公告)日：2019-08-20

申请号：US15348211

申请日：2016-11-10

Applicant: THALES

Inventor： Nicolas Martin ,  Yves Clauzel

IPC: G01S19/21 ,  G01S19/23 ,  G01S19/30

Abstract: This determination method for determining a wrong synchronization including the steps of determining an ad hoc correlator corresponding to the value of correlation between the received signal and the local signal, and determining N additional correlators corresponding to the values of correlation between the received signal and an offset signal, each offset signal including a spreading code that is offset in relation to the local spreading code, and determining a value for the amount of inconsistency between the frequency of the local carrier wave and the frequency of the local spreading code; if the value of inconsistency is higher than a predetermined threshold value of inconsistency, determining a wrong synchronization; otherwise, determining an indicator of wrong synchronization as a function of the correlators determined, comparing the indicator of wrong synchronization with at least one threshold value, determining a wrong synchronization based on the result of the comparison.

公开(公告)号：US09720097B2

公开(公告)日：2017-08-01

申请号：US13847416

申请日：2013-03-19

Applicant: THALES

Inventor： Nicolas Martin ,  Vincent Chopard ,  David Depraz

IPC: G01S19/29 ,  G01S19/14 ,  G01S19/24 ,  G01S19/35

CPC classification number: G01S19/29 ,  G01S19/14 ,  G01S19/24 ,  G01S19/35

Abstract: The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier and in demodulating the signals received by each antenna separately. The diversity of the demodulation chains is utilized to compensate the signal loss on one of the chains when the corresponding antenna experiences a signal loss due to the masking of the satellite by the carrier.

公开(公告)号：US20140292576A1

公开(公告)日：2014-10-02

申请号：US14226049

申请日：2014-03-26

Applicant: THALES

Inventor： Nicolas Martin ,  Jean-Michel Perre ,  Vincent Chopard

IPC: G01S19/21

CPC classification number: G01S19/215

Abstract: Method for detecting signals intended as a decoy for a receiver of signals from a satellite navigation system, the receiver being equipped with an antenna using controlled reception pattern sensors, comprising the following steps consisting in, for each satellite: calculating (1) the position of the satellite in a first TGL reference frame centred on the receiver based on the position of the receiver and on the position of the satellite; determining (2) the attitude of the antenna in the first reference frame; calculating (3) first elevation and azimuthal angles of the satellite in a second reference frame linked to the antenna, starting from the position of the satellite in the first reference frame and from the attitude of the antenna in the first reference frame; determining (4) second elevation and azimuthal angles of the satellite in the second reference frame, by iterative search for a maximum of a weighted complex sum of the demodulated signals received by the antenna; calculating (5) the value of a likelihood function between the first elevation and azimuthal angles of the satellite and the second elevation and azimuthal angles of the satellite; and detecting (6) a risk of receiving decoy signals when the said value of the likelihood function is lower than a threshold.

Abstract translation: 用于检测作为来自卫星导航系统的信号接收机的诱饵的信号的方法，所述接收机配备有使用受控接收模式传感器的天线，包括以下步骤：对于每个卫星，计算（1） 基于接收机的位置和卫星的位置的第一个TGL参考帧中的卫星; 确定（2）天线在第一参考帧中的姿态; 从第一参考帧中的卫星的位置和第一参考帧中天线的姿态开始，计算（3）连接到天线的第二参考帧中的卫星的第一高程和方位角; 通过迭代搜索由天线接收的解调信号的加权复数的最大值来确定第二参考帧中卫星的第二高程和方位角; 计算（5）卫星的第一高程和方位角之间似然函数的值和卫星的第二高程和方位角; 以及当所述似然函数的所述值低于阈值时，检测（6）接收诱饵信号的风险。

公开(公告)号：US20130249735A1

公开(公告)日：2013-09-26

申请号：US13847390

申请日：2013-03-19

Applicant: THALES

Inventor： Nicolas Martin ,  Vincent Chopard ,  David Depraz

IPC: G01S19/29

CPC classification number: G01S19/29 ,  G01S19/14 ,  G01S19/36

Abstract: The invention relates to a device for receiving satellite radio-navigation signals comprising a plurality of receiving antennas forming an antenna array. The invention consists in using a plurality of antennas disposed around the circumference of a carrier, in demodulating the signals received by each antenna separately and then in combining the various demodulated signals, thereby amounting to effecting a beam forming in an equivalent antenna pattern. The invention then requires only a single synchronization slaving for the set of demodulation pathways.

Abstract translation: 本发明涉及一种用于接收包括形成天线阵列的多个接收天线的卫星无线电导航信号的装置。 本发明在于使用设置在载体周围的多个天线，分别解调由每个天线接收的信号，然后组合各种解调信号，从而实现以等效天线方向图形成波束形成。 因此，本发明仅需要用于该组解调路径的单个同步从动。

公开(公告)号：US11693121B2

公开(公告)日：2023-07-04

申请号：US16814870

申请日：2020-03-10

Applicant: THALES

Inventor： Nicolas Martin ,  Daniel Millwood ,  Stéphane Rollet

IPC: G01S19/21 ,  H04K3/00 ,  G01S19/36 ,  G01S19/30 ,  G01S19/20

CPC classification number: G01S19/21 ,  G01S19/30 ,  G01S19/36 ,  H04K3/228 ,  H04K3/90 ,  G01S19/20

Abstract: A method and a function for checking the integrity of the processing of a radionavigation signal emitted by a satellite, the signal being received by a receiver comprising reception means and processing means, the processing means comprising a linear anti-interference filter, the integrity checking method comprising at least a first phase of detection of a risk of false lock-on comprising the following steps: a step of recovery of a nominal theoretical self-correlation function of the received signal not processed by the linear anti-interference filter; a step of determination of a mean theoretical self-correlation function of the signal received and processed by the linear anti-interference filter over a defined integration period; a step of determination of the number of local maxima of the modulus or of the modulus squared of the mean theoretical self-correlation function, a risk of false lock-on being detected if the number of local maxima is greater than or equal to two.

公开(公告)号：US08655298B2

公开(公告)日：2014-02-18

申请号：US13627889

申请日：2012-09-26

Applicant: Thales

Inventor： Nicolas Martin ,  Franck Leteshi ,  Bruno Montagne

IPC: H04B1/10

CPC classification number: G01S19/21

Abstract: A technique for locating sources interfering on a signal received by a receiver comprising an array of antennas calculates a spatio-temporal intercorrelation matrix Rxx, subdivides the useful band of the signals into sub-bands (b), and for each sub-band (b), calculates the spatial intercorrelation matrix R(b) associated with the sub-band (b) and calculates at least one of its eigenvalues {λ1, λ2, . . . λM}. Interference in the sub-band is detected with the aid of the following detection criterion: log ⁡ ( ( ∑ m = k M ⁢ λ m ) ⁢ / ⁢ ( M - k + 1 ) ) - log ⁡ ( ∏ m = k M ⁢ λ m ) ⁢ / ⁢ ( M - k + 1 ) > threshold , and determining the eigenvectors {U1, U2, . . . UN} of the spatial intercorrelation matrix R(b), and determining the directions of arrival of the interfering sources by searching for the vectors of relative gains belonging to the said interference sub-space or which are orthogonal to the orthogonal noise sub-space and complementary to the interference sub-space.

Abstract translation: 用于定位干扰由包括天线阵列的接收机接收的信号的源的技术计算时空相关矩阵Rxx，将信号的有用频带细分为子带（b），并将每个子带（b ），计算与子带（b）相关联的空间相关矩阵R（b），并计算其特征值{λ1，λ2，...中的至少一个。 。 。 lambdaM}。 借助于以下检测标准检测子带中的干扰：log⁡（（Σm = k Mλm）/（M-k + 1））-log⁡（Πm = k M λm）/（M-k + 1）>阈值，并且确定特征向量{U1，U2，...， 。 。 UN}，并且通过搜索属于所述干扰子空间的或与正交噪声子空间正交的相对增益的向量来确定干扰源的到达方向，以及 与干扰子空间互补。

公开(公告)号：US10591611B2

公开(公告)日：2020-03-17

申请号：US15427595

申请日：2017-02-08

Applicant: THALES AVIONICS

Inventor： Nicolas Martin ,  Denis Bouvet

IPC: G01S19/30 ,  G01S19/21

Abstract: A method for determining a wrong synchronization of a receiver with a satellite, associated receiver and computer program product, is implemented after the acquisition phase and includes the following steps: generating first and second test signals; for each correlation interval, determining a first prompt correlator corresponding to the correlation value between the received signal and the first test signal, and a second prompt correlator corresponding to the correlation value between the received signal and the second test signal; determining first and second energy values corresponding to the energy of the first and second correlators, respectively; determining a wrong synchronization indicator based on the difference between the first and second energy values; and detecting a wrong synchronization based on this indicator.