WO2011083269A1 - Method for locating a signal disrupting source in the field of radio navigation - Google Patents

Method for locating a signal disrupting source in the field of radio navigation Download PDF

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Publication number
WO2011083269A1
WO2011083269A1 PCT/FR2011/050007 FR2011050007W WO2011083269A1 WO 2011083269 A1 WO2011083269 A1 WO 2011083269A1 FR 2011050007 W FR2011050007 W FR 2011050007W WO 2011083269 A1 WO2011083269 A1 WO 2011083269A1
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WO
WIPO (PCT)
Prior art keywords
dir
source
receiving member
locating
orientation
Prior art date
Application number
PCT/FR2011/050007
Other languages
French (fr)
Inventor
Bernard Panefieu
Original Assignee
Helileo
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Publication date
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Publication of WO2011083269A1 publication Critical patent/WO2011083269A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/13—Receivers
    • G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/14—Systems for determining direction or deviation from predetermined direction
    • G01S3/16—Systems for determining direction or deviation from predetermined direction using amplitude comparison of signals derived sequentially from receiving antennas or antenna systems having differently-oriented directivity characteristics or from an antenna system having periodically-varied orientation of directivity characteristic
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO 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
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/02—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using radio waves
    • G01S3/72—Diversity systems specially adapted for direction-finding

Definitions

  • satellite radionavigation is widespread.
  • a pedestrian or a vehicle such as a car, a boat, a satellite or an aircraft, the vehicle being equipped with an on-board radio navigation system able to receive waves.
  • a vehicle such as a car, a boat, a satellite or an aircraft
  • the vehicle being equipped with an on-board radio navigation system able to receive waves.
  • an on-board radio navigation system able to receive waves.
  • satellites emitted by satellites.
  • GPS GPS, Galileo, Glonass, each integrating a constellation of satellites.
  • the onboard radionavigation system receives signals of very low power.
  • the radionavigation system can take into account for localization the signal of at least one low-power disturbing source, either because it is weak and close or because it is strong and distant.
  • This vulnerability of satellite navigation radio is particularly detrimental in the landing phase of an aircraft, for the return of a boat in a channel, or when docking a boat against a drilling platform at sea or even against a dock.
  • the detection and location of a disturbing source is therefore essential.
  • a detection system of such a source may comprise a plurality of receiving members, each receiving member being provided with an arunal. Since each receiving organ indicates a direction of emission of the source, it is possible to determine by triangulation the position of this source. In a variant, it is possible to use a single receiver member which, while moving, makes it possible to obtain several concurrent directions.
  • Such a principle has as its main limit the sensitivity of the receiving organ with regard to the power of the disturbing wave.
  • the method of the invention must make it possible to determine the position of the source of the disturbing wave.
  • the device can also limit the impact of multipath by reducing or eliminating their effects, which can be likened to a disturbance.
  • the invention relates to a method for locating a source of at least one interference wave with a radio navigation signal emitted by a satellite, characterized in that it comprises the following steps:
  • FIG. 2 is a flow chart of the steps of a method for locating the source of FIG.
  • FIG. 3 is a schematic representation of a radiation pattern of a receiver member for the method of FIG. 2,
  • FIG 4 is a schematic representation of an embodiment of the receiving member of Figure 3.
  • FIG. 5 is a flow chart of the steps of the method of Figure 2 according to a variant.
  • the invention relates to a method for locating 10 at least one disturbing source 12 in a signal 14 emitted by a satellite 16 in the field of radionavigation.
  • the source 12 will be called disturbing source.
  • the method 10 comprises a first step 20 for receiving at least one characteristic of a radionavigation signal 22 resulting from the disturbance of the signal 14 by the source 12 with the aid of FIG. at least one receiving member 21 having at least one weakened gain line Ly.
  • characteristic of the signal 22 is meant any physical quantity of the signal that can be measured, such as, for example, the power of the signal.
  • receiving member 21 is meant a device comprising a plurality of antennas, or multi-antenna device, the antennas being separated by an adequate distance depending on the wavelength of the signal 14 and the characteristics of the insulating material from which the antennas are made, and whose gain or antenna radiation pattern is controlled and comprises at least one receiving trough in a given direction called the line of sight, as shown in Figure 3.
  • CRPA Controlled Reception Pattern Antenna
  • the method 10 comprises a following step 23 which consists in varying the orientation of the line of sight L0, in measuring the value M of the at least one characteristic received by the organ receiver 21 for each orientation, determine the direction of the disturbing source 12 as a function of the variation of the measured value M with respect to a reference value Ref of the radionavigation signal 14.
  • the reference value Ref may be, for example, the value of the undisturbed signal 14 at the location of each antenna, that is to say the value that would be received by the antenna concerned if there was no interference. disturbance.
  • a step of comparison of the values M obtained with the reference value ef is performed to determine the direction of the line of sight Lv associated with the smallest calculated difference Emin, noted Emin, corresponding to the reception of the signal. the most disturbed.
  • the direction of the disturbing source could be associated with a maximum value, a point of inflection or other.
  • the line of sight Lv associated with the smallest distance Emin corresponds to the direction Dir of the disturbing source 12 relative to the receiving member 21. Knowing independently by measurement the position of the receiving member 21 and its orientation it is then possible to know precisely in space the direction Dir.
  • the variation step 23 of the orientation of the line of sight Lv comprises a step of modifying the orientation of the receiving member 21.
  • the step of variation of the orientation 23 of the line of sight Lv comprises a step of modifying the characteristics of the receiving member 21.
  • the receiver member 21 comprises a central antenna AO and six peripheral antennas A1 to A6 disposed around the central antenna A0.
  • each antenna receives the disturbed signal 22, and the difference E is calculated for each antenna for the antennas A1 to A6.
  • the smallest of them, Emin corresponds to the most noisy zone, and the line of sight between Lv the central antenna AO and the antenna for which E is equal to Emin gives the direction between the receiver member 21 and the source 12.
  • this line of sight Lv is represented by the direction Dir between the antenna AO and the antenna A4.
  • the determination step 24 of the direction Dir comprises several iterations from a displacement of the receiver member 21 along each Dir direction determined by the previous iteration.
  • the receiving member 21 is moved along this first direction Dir.
  • New measures in accordance with the steps already described allow the determination of a new Emin, and therefore of a new direction, more precise than the previous one.
  • the displacement of the receiving member 21 ensures convergence towards the precise direction between the receiving member 21 and the disturbing source 12.
  • the method 10 comprises a plurality of steps for calculating the value of the smallest difference E min by measurements at a plurality of locations of the receiver member 21, the receiver member 21 being movable along a given trajectory, a step of determining a direction Dir associated with each value of the smallest calculated difference Emin, and a step determining the position of the source 12 in the intersection zone between said directions Dir.
  • the displacement in space of the receiving member 21 allows the determination of several concurrent directions whose intersection indicates the position of the disturbing source 12.
  • the trajectory of the receiver member 21 must be distinct from each Dir direction, so that there is an intersection between the determined directions.
  • This variant is entirely compatible with the determination step 24 with several iterations. Indeed, to accurately determine a first direction Dir, the device moves substantially along this first direction Dir, as explained above, the precise direction being determined by several iterations. Then, the receiving organ 21 moves in moving away from this first direction Dir, so as to determine a second direction Dir, possibly by iterations.
  • the method 10 also comprises the following steps:
  • a step 28 consisting in varying the orientation of the line of sight LV, measuring the value M of said at least one characteristic received by said at least one other receiving member for each orientation,
  • two fixed receiving members 21 are sufficient to determine the position of the source 12.
  • the multi-antenna device is mounted in a vehicle in order to be moved, this vehicle possibly being for example a car or a helicopter.
  • the displacement of the multi-antenna device it is advantageous to choose a dynamic matched to the desired accuracy of the location of the disturbing source 12.
  • the method according to the invention therefore makes it possible not only to detect the presence of a source of disturbances, but also to obtain in real time its position with precision.
  • the method according to the invention can be advantageously used by a fleet of helicopters permanently monitoring sensitive areas, such as airports, or called in case of disturbance in said sensitive area to locate in real time sources of disruptions.
  • the method according to the invention 10 is not limited to the detection of a single source 12 but a plurality, since N antennas of the multi-antenna device allow the determination of N-1 sources.

Abstract

The invention relates to a method for locating a source (12) of at least one disrupting wave interfering with a radio navigation signal (14) transmitted by a satellite (16), characterised in that said method includes the following steps: receiving (20) at least one characteristic of a radio navigation signal (22) transmitted by a satellite disrupted by a disrupting source (12) via at least one receiving member (21) having at least one line of sight (Lv) with reduced gain, changing the setting of the line of sight (Lv) and measuring the value (M) of said at least one characteristic received by said at least one receiving member for each setting, and determining the direction (Dir) of the disrupting source (12) relative to said at least one receiving member according to changes in the value measured (M) relative to a reference value (Ref) of the radio navigation signal.

Description

PROCEDE DE LOCALISATION D'UNE SOURCE PERTURBATRICE D'UN SIGNAL DANS LE DOMAINE DE LA RADIONAVIGATION  METHOD FOR LOCATING A SOURCE WHICH DISRUPTS A SIGNAL IN THE FIELD OF RADIONAVIGATION
La présente invention concerne un procédé de localisation d'une source d'au moins une onde perturbatrice d'un signal de radionavigation. The present invention relates to a method for locating a source of at least one disturbing wave of a radionavigation signal.
De nos jours, la radionavigation par satellite est largement répandue. Elle permet en particulier la géolocalisation en temps réel d'un piéton ou d'un véhicule, tel qu'une voiture, un bateau, un satellite ou un aéronef, le véhicule étant muni d'un système de radionavigation embarqué apte à recevoir des ondes émises par des satellites. Ainsi, on connait plusieurs systèmes de positionnement à partir de signaux satellitaires : GPS, Galileo, Glonass, intégrant chacun une constellation de satellites.  Nowadays, satellite radionavigation is widespread. In particular, it allows the real-time geolocation of a pedestrian or a vehicle, such as a car, a boat, a satellite or an aircraft, the vehicle being equipped with an on-board radio navigation system able to receive waves. emitted by satellites. Thus, we know several positioning systems from satellite signals: GPS, Galileo, Glonass, each integrating a constellation of satellites.
Compte tenu de l'éloignement des satellites, le système de radionavigation embarqué reçoit des signaux de très faible puissance. Given the distance of the satellites, the onboard radionavigation system receives signals of very low power.
Dans ce contexte, il n'est pas rare qu'une source extérieure au système de radionavigation par satellite émette des ondes qui interfèrent avec les signaux émis par les satellites. En effet, dans la mesure où par principe le système de radionavigation cherche plusieurs signaux pour se localiser, le système de radionavigation peut prendre en compte pour la localisation le signal d'au moins une source perturbatrice de faible puissance, soit parce qu'elle est faible et proche ou soit parce qu'elle est forte et éloignée.  In this context, it is not uncommon for a source external to the satellite radio navigation system to emit waves that interfere with the signals emitted by the satellites. Indeed, insofar as, in principle, the radionavigation system searches for several signals to locate itself, the radionavigation system can take into account for localization the signal of at least one low-power disturbing source, either because it is weak and close or because it is strong and distant.
Cette vulnérabilité de la radio navigation par satellite est particulièrement préjudiciable en phase d'atterrissage d'un aéronef, pour la rentrée d'un bateau dans un chenal, ou encore lors de l'accostage d'un bateau contre une plateforme de forage en mer ou même contre un quai. La détection et la localisation d'une source perturbatrice s'avèrent donc primordiales. This vulnerability of satellite navigation radio is particularly detrimental in the landing phase of an aircraft, for the return of a boat in a channel, or when docking a boat against a drilling platform at sea or even against a dock. The detection and location of a disturbing source is therefore essential.
La détection d'une onde perturbatrice, ainsi que la localisation de la source de cette onde au moyen d'un organe récepteur directionnel, sont bien connues de l'état de la technique et utilisées tant pour des besoins civils que militaires. Le principe repose sur la réception de l'onde perturbatrice. Un système de détection d'une telle source peut comprendre une pluralité d'organes récepteurs, chaque organe récepteur étant muni d'une arûenne. Chaque organe récep eur indiquant une direction d'émission de la source, il est possible de déterminer par triangulation la position de cette source. En variante, on peut utiliser un seul organe récepteur qui, en se déplaçant, permet d'obtenir plusieurs directions concourantes.  The detection of a disturbing wave, as well as the location of the source of this wave by means of a directional receiver, are well known in the state of the art and used for both civilian and military needs. The principle is based on the reception of the disturbing wave. A detection system of such a source may comprise a plurality of receiving members, each receiving member being provided with an arunal. Since each receiving organ indicates a direction of emission of the source, it is possible to determine by triangulation the position of this source. In a variant, it is possible to use a single receiver member which, while moving, makes it possible to obtain several concurrent directions.
Un tel principe a pour principale limite la sensibilité de l'organe récepteur au regard de la puissance de l'onde perturbatrice.  Such a principle has as its main limit the sensitivity of the receiving organ with regard to the power of the disturbing wave.
Aussi, un tel procédé reposant sur la réception de l'onde perturbatrice n'est pas adapté dans le domaine de la radionavigation du fait que la puissance reçue par les organes récepteurs est très faible et peut être en-dessous de leurs sensibilités. Also, such a method based on the reception of the disturbing wave is not suitable in the field of radionavigation because the power received by the receiving members is very low and may be below their sensitivities.
Selon un autre aspect, la précision de détermination de la position de la source de l'onde perturbatrice au moyen d'un organe récepteur directionnel apte à recevoir ladite onde peut être affectée par l'effet des multi-trajets en raison des réflexions sur le sol ou des obstacles.  In another aspect, the accuracy of determining the position of the source of the disturbing wave by means of a directional receiving member adapted to receive said wave may be affected by the effect of the multipath due to reflections on the ground or obstacles.
Il existe donc un besoin d'un procédé de localisation d'une source d'au moins une onde perturbatrice dans le domaine de la radionavigation, qui ne soit pas limité par la sensibilité de l'organe récepteur. Selon un autre objectif, le procédé de l'invention doit permettre de déterminer la position de la source de l'onde perturbatrice. En outre, le dispositif peut aussi limiter l'impact des multi-trajets en réduisant ou supprimant leurs effe s qui peuvent s'apparenter à une perturbation. There is therefore a need for a method of locating a source of at least one disturbing wave in the field of radionavigation, which is not limited by the sensitivity of the receiving member. According to another objective, the method of the invention must make it possible to determine the position of the source of the disturbing wave. In addition, the device can also limit the impact of multipath by reducing or eliminating their effects, which can be likened to a disturbance.
A cet effet, l'invention concerne un procédé de localisation d'une source d'au moins une onde perturbatrice nterférence avec un signal de radionavigation émis par un satellite, caractérisé en ce qu'il comprend les étapes suivantes :  To this end, the invention relates to a method for locating a source of at least one interference wave with a radio navigation signal emitted by a satellite, characterized in that it comprises the following steps:
-recevoir au moins une caractéristique d'un signal de radionavigation émis par un satellite perturbé par une source perturbatrice à l'aide d'au moins un organe récepteur ayant au moins une ligne de visée à gain affaibli,  receive at least one characteristic of a radionavigation signal emitted by a satellite disturbed by a disturbing source by means of at least one receiving member having at least one weakened gain line of sight,
-faire varier l'orientation de la ligne de visée et mesurer la valeur de ladite une caractéristique reçue par ledit un organe récepteur pour chaque orientation, et -déterminer la direction de la source perturbatrice par rapport audit au moins un organe récepteur en fonction de la variation de la valeur mesurée par rapport à une valeur de référence du signal de radionavigation. varying the orientation of the line of sight and measuring the value of said characteristic received by said one receiving member for each orientation, and determining the direction of the disturbing source with respect to said at least one receiving member as a function of the variation of the measured value with respect to a reference value of the radionavigation signal.
L'invention sera décrite maintenant plus en détail en référence aux figures annexées données uniquement à titre d'exemple et dans lesquelles :  The invention will now be described in more detail with reference to the appended figures given solely by way of example and in which:
-la figure 1 est une représentation schématique d'une communication de radio navigation perturbée par une source perturbatrice,  FIG. 1 is a schematic representation of a radio navigation communication disturbed by a disturbing source,
-la figure 2 est un ordinogramme des étapes d'un procédé de localisation de la source de la figure 1,  FIG. 2 is a flow chart of the steps of a method for locating the source of FIG.
-la figure 3 est une représentation schématique d'un diagramme de rayonnement d'un organe récepteur pour le procédé de la figure 2, FIG. 3 is a schematic representation of a radiation pattern of a receiver member for the method of FIG. 2,
-la figure 4 est une représentation schématique d'un mode de réalisation de l'organe récepteur de la figure 3, et  FIG 4 is a schematic representation of an embodiment of the receiving member of Figure 3, and
- la figure 5 est un ordinogramme des étapes du procédé de la figure 2 selon une variante.  - Figure 5 is a flow chart of the steps of the method of Figure 2 according to a variant.
L'invention concerne un procédé de localisation 10 d'au moins une source perturbatrice 12 nterférence d'un signal 14 émis par un satellite 16 dans le domaine de la radionavigation. Dans la suite de la description, la source 12 sera appelée source perturbatrice. The invention relates to a method for locating 10 at least one disturbing source 12 in a signal 14 emitted by a satellite 16 in the field of radionavigation. In the rest of the description, the source 12 will be called disturbing source.
Comme visible à la figure 2, le procédé 10 selon l'invention comprend une première étape 20 de réception d'au moins une caractéristique d'un signal de radionavigation 22 issu de la perturbation du signal 14 par la source 12 à l'aide d'au moins un organe récepteur 21 ayant au moins une ligne de visée Ly à gain affaibli.  As can be seen in FIG. 2, the method 10 according to the invention comprises a first step 20 for receiving at least one characteristic of a radionavigation signal 22 resulting from the disturbance of the signal 14 by the source 12 with the aid of FIG. at least one receiving member 21 having at least one weakened gain line Ly.
Par caractéristique du signal 22, on entend toute grandeur physique du signal pouvant être mesurée, telle que par exemple la puissance du signal.  By characteristic of the signal 22 is meant any physical quantity of the signal that can be measured, such as, for example, the power of the signal.
Par organe récepteur 21, on entend un dispositif comprenant une pluralité d'antennes, ou dispositif multi-antennes, les antennes étant séparées par une distance adéquate dépendant de la longueur d'onde du signal 14 et des caractéristiques du matériau isolant à partir duquel les antennes sont réalisées, et dont le gain ou diagramme de rayonnement d'antennes est contrôlé et comprend au moins un creux de réception dans une direction donnée appelée la ligne de visée, comme illustré à la figure 3. A titre d'exemple, on peut utiliser comme organe récep eur une antenne connue sous la dénomination en langue anglaise de « Controlled Réception Pattern Antenna » (CRPA). By receiving member 21 is meant a device comprising a plurality of antennas, or multi-antenna device, the antennas being separated by an adequate distance depending on the wavelength of the signal 14 and the characteristics of the insulating material from which the antennas are made, and whose gain or antenna radiation pattern is controlled and comprises at least one receiving trough in a given direction called the line of sight, as shown in Figure 3. For example, use as the receiving organ an antenna known under the English language name of "Controlled Reception Pattern Antenna" (CRPA).
Comme visible à la figure 2, le procédé 10 selon l'invention comprend une étape suivante 23 qui consiste à faire varier l'orientation de la ligne de visée Ly, à mesurer la valeur M de la au moins une caractéristique reçue par l'organe récepteur 21 pour chaque orientation, déterminer la direction de la source perturbatrice 12 en fonction de la variation de la valeur M mesurée par rapport à une valeur de référence Ref du signal de radionavigation 14. As can be seen in FIG. 2, the method 10 according to the invention comprises a following step 23 which consists in varying the orientation of the line of sight L0, in measuring the value M of the at least one characteristic received by the organ receiver 21 for each orientation, determine the direction of the disturbing source 12 as a function of the variation of the measured value M with respect to a reference value Ref of the radionavigation signal 14.
La valeur de référence Ref peut être par exemple la valeur du signal 14 non perturbé à l'emplacement de chaque antenne, c'est-à-dire la valeur qui serait reçue par l'antenne concernée s'il n'y avait pas de perturbation. Selon un mode opératoire non limitatif, on effectue une étape de comparaison des valeurs M obtenues avec la valeur de référence ef pour déterminer la direction de la ligne de visée Lv associée au plus faible écart E calculé, noté Emin, correspondant à la réception du signal le plus perturbé. The reference value Ref may be, for example, the value of the undisturbed signal 14 at the location of each antenna, that is to say the value that would be received by the antenna concerned if there was no interference. disturbance. According to a non-limiting procedure, a step of comparison of the values M obtained with the reference value ef is performed to determine the direction of the line of sight Lv associated with the smallest calculated difference Emin, noted Emin, corresponding to the reception of the signal. the most disturbed.
En variante, en fonction de la caractéristique mesurée, la direction de la source perturbatrice pourrait être associée à une valeur maximale, à un point d'inflexion ou autre. Alternatively, depending on the measured characteristic, the direction of the disturbing source could be associated with a maximum value, a point of inflection or other.
La ligne de visée Lv associée à l'écart le plus faible Emin correspond à la direction Dir de la source perturbatrice 12 par rapport à l'organe récepteur 21. Connaissant par mesure indépendante la position de l'organe de réception 21 ainsi que son orientation, il est alors possible de connaître précisément dans l'espace la direction Dir.  The line of sight Lv associated with the smallest distance Emin corresponds to the direction Dir of the disturbing source 12 relative to the receiving member 21. Knowing independently by measurement the position of the receiving member 21 and its orientation it is then possible to know precisely in space the direction Dir.
Selon une autre caractéristique de l'invention, l'étape de variation 23 de l'orientation de la ligne de visée Lv comprend une étape de modification de l'orientation de l'organe récepteur 21.  According to another characteristic of the invention, the variation step 23 of the orientation of the line of sight Lv comprises a step of modifying the orientation of the receiving member 21.
Alternativement, l'étape de variation de l'orientation 23 de la ligne de visée Lv comprend une étape de modification des caractéristiques de l'organe récepteur 21.  Alternatively, the step of variation of the orientation 23 of the line of sight Lv comprises a step of modifying the characteristics of the receiving member 21.
Dans un mode de réalisation de l'organe récepteur 21 illustré à la figure 4, l'organe récepteur 21 comprend une antenne centrale AO et six antennes périphériques Al à A6 disposées autour de l'antenne centrale AO. Comme expliqué précédemment, chaque antenne reçoit le signal perturbé 22, et l'écart E est calculé pour chaque antenne pour les antennes Al à A6. Le plus petit d'entre eux, Emin, correspond à la zone la plus bruitée, et la ligne de visée entre Lv l'antenne centrale AO et l'antenne pour laquelle E est égal à Emin donne la direction entre l'organe récepteur 21 et la source 12. Sur la figure 4, cette ligne de visée Lv est représentée par la direction Dir entre l'antenne AO et l'antenne A4. Selon une autre caractéristique de l'invention, l'étape de détermination 24 de la direction Dir comprend plusieurs itérations à partir d'un déplacement de l'organe récepteur 21 le long de chaque direction Dir déterminée par l'itération précédente. En d'autres termes, après avoir calculé Emin et déterminé la direction Dir comme expliqué précédemment dans une première itération, l'organe récepteur 21 est déplacé le long de cette première direction Dir. De nouvelles mesures conformément aux étapes déjà décrites permettent la détermination d'un nouveau Emin, et donc d'une nouvelle direction, plus précise que la précédente. Ainsi, par itérations successives, le déplacement de l'organe récep eur 21 assure une convergence vers la direction précise entre l'organe récepteur 21 et la source perturbatrice 12. In one embodiment of the receiver member 21 illustrated in FIG. 4, the receiver member 21 comprises a central antenna AO and six peripheral antennas A1 to A6 disposed around the central antenna A0. As previously explained, each antenna receives the disturbed signal 22, and the difference E is calculated for each antenna for the antennas A1 to A6. The smallest of them, Emin, corresponds to the most noisy zone, and the line of sight between Lv the central antenna AO and the antenna for which E is equal to Emin gives the direction between the receiver member 21 and the source 12. In FIG. 4, this line of sight Lv is represented by the direction Dir between the antenna AO and the antenna A4. According to another characteristic of the invention, the determination step 24 of the direction Dir comprises several iterations from a displacement of the receiver member 21 along each Dir direction determined by the previous iteration. In other words, after calculating Emin and determining the direction Dir as explained previously in a first iteration, the receiving member 21 is moved along this first direction Dir. New measures in accordance with the steps already described allow the determination of a new Emin, and therefore of a new direction, more precise than the previous one. Thus, by successive iterations, the displacement of the receiving member 21 ensures convergence towards the precise direction between the receiving member 21 and the disturbing source 12.
Selon une variante, le procédé 10 comprend une pluralité d'étapes de calcul de la valeur du plus faible écart Emin par mesures à une pluralité d'emplacements de l'organe récepteur 21, l'organe récepteur 21 étant mobile selon une trajectoire donnée, une étape de détermination d'une direction Dir associée à chaque valeur du plus faible écart calculé Emin , et une étape détermination de la position de la source 12 dans la zone d'intersection entre lesdites directions Dir. Ainsi, le déplacement dans l'espace de l'organe récepteur 21 permet la détermination de plusieurs directions concourantes dont l'intersection indique la position de la source perturbatrice 12.  According to a variant, the method 10 comprises a plurality of steps for calculating the value of the smallest difference E min by measurements at a plurality of locations of the receiver member 21, the receiver member 21 being movable along a given trajectory, a step of determining a direction Dir associated with each value of the smallest calculated difference Emin, and a step determining the position of the source 12 in the intersection zone between said directions Dir. Thus, the displacement in space of the receiving member 21 allows the determination of several concurrent directions whose intersection indicates the position of the disturbing source 12.
La trajectoire de l'organe récepteur 21 doit être distincte de chaque direction Dir, afin qu'il y ait intersection entre les directions déterminées.  The trajectory of the receiver member 21 must be distinct from each Dir direction, so that there is an intersection between the determined directions.
Cette variante est tout à fait compatible avec l'étape de détermination 24 à plusieurs itérations. En effet, pour déterminer avec précision une première direction Dir, le dispositif se déplace sensiblement le long de cette première direction Dir, comme expliqué précédemment, la direction précise étant déterminée par plusieurs itérations. Puis, l'organe récepteur 21 se déplace en s'éloignant de cette première direction Dir , de façon à déterminer une seconde direction Dir, éventuellement par itérations. This variant is entirely compatible with the determination step 24 with several iterations. Indeed, to accurately determine a first direction Dir, the device moves substantially along this first direction Dir, as explained above, the precise direction being determined by several iterations. Then, the receiving organ 21 moves in moving away from this first direction Dir, so as to determine a second direction Dir, possibly by iterations.
Selon une autre variante illustrée à la figure 5, le procédé 10 comprend également les étapes suivantes :  According to another variant illustrated in FIG. 5, the method 10 also comprises the following steps:
-une étape 26 de réception d'au moins une caractéristique d'un signal de radionavigation 23 émis par le satellite 16 perturbé par la source perturbatrice 12 à l'aide d'au moins un autre organe récepteur ayant au moins une ligne de visée LV à gain affaibli, a step 26 for receiving at least one characteristic of a radionavigation signal 23 emitted by the satellite 16 disturbed by the disturbing source 12 by means of at least one other receiver member having at least one line of sight LV with weakened gain,
-une étape 28 consistant à faire varier l'orientation de la ligne de visée LV, mesurer la valeur M de ladite au moins une caractéristique reçue par ledit au moins un autre organe récepteur pour chaque orientation,  a step 28 consisting in varying the orientation of the line of sight LV, measuring the value M of said at least one characteristic received by said at least one other receiving member for each orientation,
-une étape 30 de détermination d'au moins une autre direction Dir' de la source perturbatrice 12 par rapport audit autre organe récepteur en fonction de la variation de la valeur mesurée M par rapport à une valeur de référence ef du signal de radionavigation, et  a step 30 of determining at least one other direction Dir 'of the disturbing source 12 with respect to said other receiver element as a function of the variation of the measured value M with respect to a reference value ef of the radionavigation signal, and
-une étape 32 de détermination de la position de la source perturbatrice 12 dans la zone d'intersection entre la au moins une direction Dir et la au moins une autre direction Dir', chaque organe récepteur étant fixe.  a step 32 of determining the position of the disturbing source 12 in the zone of intersection between the at least one direction Dir and the at least one other direction Dir ', each receiving member being fixed.
Ainsi, selon cette variante, deux organes récepteurs 21 fixes suffisent pour déterminer la position de la source 12.  Thus, according to this variant, two fixed receiving members 21 are sufficient to determine the position of the source 12.
Il est avantageux que le dispositif multi-antennes soit monté dans un véhicule afin d'être déplacé, ce véhicule pouvant être par exemple une voiture ou un hélicoptère.  It is advantageous for the multi-antenna device to be mounted in a vehicle in order to be moved, this vehicle possibly being for example a car or a helicopter.
Dans les modes de réalisation pour lesquels le déplacement du dispositif multi- antennes est prévu, il est avantageux de choisir une dynamique adaptée à la précision souhaitée de localisation de la source perturbatrice 12. Le procédé selon l'invention permet donc non seulement de détecter la présence d'une source de perturbations, mais également d'en obtenir en temps réel sa position avec précision. In the embodiments for which the displacement of the multi-antenna device is provided, it is advantageous to choose a dynamic matched to the desired accuracy of the location of the disturbing source 12. The method according to the invention therefore makes it possible not only to detect the presence of a source of disturbances, but also to obtain in real time its position with precision.
Ainsi, le procédé selon l'invention peut être avantageusement utilisé par une flotte d'hélicoptères assurant en permanence la surveillance de zones sensibles, telles que les aéroports, ou appelée en cas de perturbation dans ladite zone sensible pour localiser en temps réel des sources de perturbations.  Thus, the method according to the invention can be advantageously used by a fleet of helicopters permanently monitoring sensitive areas, such as airports, or called in case of disturbance in said sensitive area to locate in real time sources of disruptions.
Le procédé selon l'invention 10 n'est pas limité à la détection d'une seule source 12 mais une pluralité, puisque N antennes du dispositif multi-antennes permettent la détermination de N-l sources. The method according to the invention 10 is not limited to the detection of a single source 12 but a plurality, since N antennas of the multi-antenna device allow the determination of N-1 sources.

Claims

REVENDICATIONS
1. Procédé de localisation d'une source (12) d'au moins une onde perturbatrice interférente (22) avec un signal de radionavigation (14) émis par un satellite (16), caractérisé en ce qu'il comprend les étapes suivantes : A method for locating a source (12) of at least one interfering disturbing wave (22) with a radionavigation signal (14) emitted by a satellite (16), characterized in that it comprises the following steps:
-recevoir (20) au moins une caractéristique d'un signal de radionavigation (14) émis par un satellite (16) et perturbé par une source perturbatrice (12) à l'aide d'au moins un organe récepteur (21) ayant au moins une ligne de visée (Ly) à gain affaibli, receiving (20) at least one characteristic of a radionavigation signal (14) emitted by a satellite (16) and disturbed by a disturbing source (12) by means of at least one receiving member (21) having at least one minus a weakened gain line of sight (Ly),
-faire varier (23) l'orientation de la ligne de visée (L ) et mesurer la valeur (M) de ladite au moins une caractéristique reçue par ledit au moins un organe récepteur (21) pour chaque orientation, et  varying (23) the orientation of the line of sight (L) and measuring the value (M) of said at least one characteristic received by said at least one receiving member (21) for each orientation, and
-déterminer (24) la direction (Dir) de la source perturbatrice (12) par rapport audit au moins un organe récepteur (21) en fonction de la variation de la valeur mesurée (M) par rapport à une valeur de référence (Ref) du signal de radionavigation.  -determining (24) the direction (Dir) of the disturbing source (12) with respect to said at least one receiving member (21) as a function of the variation of the measured value (M) with respect to a reference value (Ref) the radionavigation signal.
2. Procédé de localisation d'au moins une source perturbatrice selon la revendication 1, caractérisé en ce que l'étape (23) de variation de l'orientation de la ligne de visée (Ly) comprend une étape de modification de l'orientation dudit au moins un organe récepteur (21).  2. Method for locating at least one disturbing source according to claim 1, characterized in that the step (23) for varying the orientation of the line of sight (Ly) comprises a step of modifying the orientation. said at least one receiving member (21).
3. Procédé de localisation d'au moins une source perturbatrice selon la revendication 1, caractérisé en ce l'étape (23) de variation de l'orientation de la ligne de visée (Ly) comprend une étape de modification des caractéristiques du au moins un organe récepteur (21).  3. Method for locating at least one disturbing source according to claim 1, characterized in that the step (23) of variation of the orientation of the line of sight (Ly) comprises a step of modifying the characteristics of the at least one a receiver member (21).
4. Procédé de localisation d'au moins une source perturbatrice selon l'une quelconque des revendications précédentes, caractérisé en ce que l'étape (24) de détermination de la direction (Dir) de la source perturbatrice (12) comprend une étape de détermination d'un écart (E) entre la valeur de référence (Ref) du signal de radionavigation et la valeur mesurée (M) pour chaque orientation. 4. Method for locating at least one disturbing source according to any one of the preceding claims, characterized in that the step (24) for determining the direction (Dir) of the disturbing source (12) comprises a step of determining a difference (E) between the reference value (Ref) of the radionavigation signal and the measured value (M) for each orientation.
5. Procédé de localisation d'une source perturbatrice selon l'une quelconque des revendications précédentes, caractérisé en ce que l'étape (24) de détermination d'une direction (Dir) de la source perturbatrice (12) comprend plusieurs itérations à partir d'un déplacement dudit au moins un organe récepteur (21) le long de chaque direction (Dir) déterminée par l'itération précédente.  5. Method for locating a disturbing source according to any one of the preceding claims, characterized in that the step (24) for determining a direction (Dir) of the disturbing source (12) comprises several iterations from a movement of said at least one receiving member (21) along each direction (Dir) determined by the previous iteration.
6. Procédé de localisation d'au moins une source perturbatrice selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il comprend une pluralité d'étapes de calcul de la valeur du plus faible écart calculé (Emin) par mesures à une pluralité d'emplacements du au moins un organe récepteur (21), l'organe récepteur (21) étant mobile selon une trajectoire donnée, une étape de détermination d'une direction (Dir) associée à chaque valeur du plus faible écart calculé (Emin), et une étape de détermination de la position de la source de perturbation (12) dans la zone d'intersection entre lesdites directions (Dir).  6. A method for locating at least one disturbing source according to claim 1, characterized in that it comprises a plurality of steps for calculating the value of the smallest calculated difference (Emin) by measurements at a time. plurality of locations of the at least one receiving member (21), the receiving member (21) being movable along a given path, a step of determining a direction (Dir) associated with each value of the smallest calculated difference (Emin ), and a step of determining the position of the disturbance source (12) in the area of intersection between said directions (Dir).
7. Procédé de localisation d'au moins une source perturbatrice selon l'une des revendications 1 à 4, caractérisé en ce qu'il comprend les étapes suivantes : -recevoir (26) au moins une caractéristique d'un signal de radionavigation (22) émis par un satellite (16) perturbé par la source perturbatrice (12) à l'aide d'au moins un autre organe récepteur ayant au moins une ligne de visée (Lv1) à gain affaibli, 7. A method of locating at least one disturbing source according to one of claims 1 to 4, characterized in that it comprises the following steps: -receceive (26) at least one characteristic of a radionavigation signal (22 ) emitted by a satellite (16) disturbed by the disturbing source (12) using at least one other receiver member having at least one weakened gain line of sight (Lv 1 ),
-faire varier (28) l'orientation de la ligne de visée (Lv1) et mesurer la valeur (M1) de ladite au moins une caractéristique reçue par ledit au moins un autre organe récepteur pour chaque orientation, varying (28) the orientation of the line of sight (Lv 1 ) and measuring the value (M 1 ) of said at least one characteristic received by said at least one other receiver member for each orientation,
-déterminer (30) au moins une autre direction (Dir1) de la source perturbatrice (12) par rapport audit autre organe récepteur en fonction de la variation de la valeur mesurée (M1) par rapport à une valeur de référence ( e ) du signal de radionavigation, et -determining (30) at least one other direction (Dir 1 ) of the disturbing source (12) with respect to said other receiver member as a function of the variation of the measured value (M 1 ) with respect to a reference value (e) of the radionavigation signal, and
-déterminer la position de la source perturbatrice (12) dans la zone d'intersection entre la au moins une direction (Dir) et la au moins une autre direction (Dir1), chaque organe récepteur étant fixe. -determine the position of the disturbing source (12) in the intersection zone between the at least one direction (Dir) and the at least one other direction (Dir 1 ), each receiving member being fixed.
PCT/FR2011/050007 2010-01-06 2011-01-04 Method for locating a signal disrupting source in the field of radio navigation WO2011083269A1 (en)

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FR1050043A FR2954976B1 (en) 2010-01-06 2010-01-06 METHOD FOR LOCATING A SOURCE WHICH DISRUPTS A SIGNAL IN THE FIELD OF RADIONAVIGATION

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230184957A1 (en) * 2021-12-09 2023-06-15 The United States Of America, As Represented By The Secretary Of The Navy Method and Device for Positioning Using Electromagnetic Interference that is Jamming Navigation Signals

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148195A (en) * 1997-02-18 2000-11-14 Itt Manufacturing Enterprises, Inc. Phase agile antenna for use in position determination
US20070004331A1 (en) * 2005-06-16 2007-01-04 Terahop Networks, Inc. tactical gps denial and denial detection system
US20070268174A1 (en) * 2006-03-17 2007-11-22 Tmc Design Corporation Jamming signal detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6148195A (en) * 1997-02-18 2000-11-14 Itt Manufacturing Enterprises, Inc. Phase agile antenna for use in position determination
US20070004331A1 (en) * 2005-06-16 2007-01-04 Terahop Networks, Inc. tactical gps denial and denial detection system
US20070268174A1 (en) * 2006-03-17 2007-11-22 Tmc Design Corporation Jamming signal detector

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BARTON ED - INSTITUTION OF ELECTRICAL ENGINEERS: "NAVSTAR GPS ADAPTIVE ANTENNA SYSTEMS", MILITARY MICROWAVES CONFERENCE PROCEEDINGS. BRIGHTON, JUNE 24 - 26, 1986; [MILITARY MICROWAVES CONFERENCE PROCEEDINGS], TUNBRIDGE WELLS, MICROWAVE LTD, GB, vol. CONF. 5, 24 June 1986 (1986-06-24), pages 555 - 563, XP002094733 *
D. WILSON, S. GANGULY: "Flexible GPS Receiver for Jammer Detection, Characterization and Mitigation Using a 3D CRPA", PROCEEDINGS OF ION GNSS 2006, 29 September 2006 (2006-09-29), Fort Worth, TX, USA, pages 189 - 200, XP002607376 *
KEN SIMONSEN ET AL: "LOCO GPSI: Detection and Location of GPS Interference/Jamming", PROCEEDINGS OF ION GNSS 2004, 24 September 2004 (2004-09-24), Long Beach, CA, USA, pages 555 - 560, XP002607377 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230184957A1 (en) * 2021-12-09 2023-06-15 The United States Of America, As Represented By The Secretary Of The Navy Method and Device for Positioning Using Electromagnetic Interference that is Jamming Navigation Signals
US11774600B2 (en) * 2021-12-09 2023-10-03 United States Of America As Represented By The Secretary Of The Navy Method and device for positioning using electromagnetic interference that is jamming navigation signals

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