Thales

Institut Mines-telecom

Dominique Heurguier

Anne Ferreol

François Delaveau

François Pipon

Marc Bavant

Jean-Luc Rogier

Frédérique Ywanne

Dieudonné Josset

Alexandre Vervisch-Picois

Bertrand Gerfault

Nel Samama

Sebastiano Schillaci

Didier Thebault

Antonio Cerasa

Philippe Buscailhon

Domenico Mazzocchetti

Emmanuel Gross

Thierry Battut

Bernard Barbet

Jean-Yves Poilleux

Thomas Chocardelles

A method for determining the position of a decoy using at least one receiver, the method includes a step for detecting a decoy attack, a step for correcting the clock bias delivered by the receiver based on an estimated drift (D) of the clock of the receiver. The method comprises a step for differential measurements using at least three corrected clock biases (CB(t″), CB(t″), CB(t″)) and a localization step for determining the position of the decoy.

Method for determining the position of a decoy using at least one receiver

A method and a device for collaborative geolocation of one or more nodes Mi in a communication network are provided, the nodes inter-exchanging distance and/or position information, comprising at least the following steps determine a first sub-graph Vof neighbor nodes of a current node A to be geolocated, in N hops, select in the first sub-graph V, the largest observable sub-graph V, execute a geolocation algorithm on the nodes of the largest observable sub-graph Vand determine at least the position of the current node A. An ad-hoc communication network is also provided.

Method for collaborative geolocation in a neighbourhood

A method for characterizing at least one signal source is disclosed. In one aspect, the method includes measuring, from a set of sensors, a set of technical data specific to the signals emitted by the signal source, grouping together the technical data in a set of classes depending on the correlations on the data and characterizing the signal source from technical data having been grouped together. The grouping step includes calculating correlations on the data n-tuples with n&#x3e;2 and calculating a global partitioning error for different distributions of the data in classes. The global partitioning error is defined as a sum of the partitioning costs for all the n-tuples. The grouping further includes retaining as a grouping of data, the distribution in the classes minimizing the global partitioning error.

Method for characterizing at least one signal source

A method for optimizing the jamming of P predefined zones or positions in a communications network of transmitters, jammers and receivers comprising several platforms, uses a local reception situation at the level of each friendly platform, a local jamming situation at the level of each friendly reception platform, and determines for each friendly transmitting platform and each friendly receiving platform, one or more parameters so as to minimize or to eliminate the fratricidal effects on the friendly reception platforms.

Method for jamming communications in an open-loop-controlled network

A method of resource reservation with service guarantee in terms of throughput and deadline at the level of the N nodes of a radio network using time slots to send and transmit data is disclosed, which implements a global reservation process in which a reservation message sent uses at least one of the following two parameters: the maximum deadline required to access the radio medium, the minimum throughput required in order to satisfy the service guarantee. A dynamic time slot allocation scheme is used that is defined in the following manner: the N nodes each include K slots, including a control slot, P elastic slots and (K-1-P) session slots, and the (K-1-P) session slots are amalgamated for the allocation of resources required by a node at a given instant.

Method for the dynamic reservation and allocation of time slots in a network with service warranty

Method of locating one or more transmitters on the basis of an array of sensors moving with respect to the transmitters comprising at least the following steps:

Method for tracking a transmitter by means of a synthetic sparse antenna network

The invention relates to a method of localization of one or more sources, said source or sources being in motion relative to a network of sensors, the method comprising a step of separation of the sources in order to identify the direction vectors associated with the response of the sensors to a source having a given, incidence, characterized in that it comprises at least the following steps:

Method for localising at least one emitter

A method for localizing one or more sources, the source or sources being in motion relative to a network of sensors, comprises a step for the separation of the sources in order to identify the direction vectors associated with the response of the sensors to a source at a given incidence. The method comprises the following steps of associating the direction vectors a. . . aobtained for the mtransmitter and, respectively, for the instants t. . . tand for the wavelengths &#x3bb;. . . , &#x3bb;, and localizing the mtransmitter from the components of the vectors a. . . ameasured with different wavelengths.

Method for the blind wideband localization of one or more transmitters from a carrier that is passing by

A method to detect and/or locate a mobile craft in a reception system making use of transmitters of opportunity, whose signal comprises elements enabling the synchronization of the receiver, wherein certain discriminating sequences are detected of the payload signal. Each transmission present on the carrier frequencies examined by the receiver or receivers is separated by the space/time filtering of the signals in each carrier frequency. The transmitters Ei corresponding to the signals received are identified. The pulse response of the propagation channel for each transmitter Ei and for each detection made on this transmitter are determined by measuring the instant of arrival of the path reflected by the mobile craft is measured and then its delay relative to the instant of transmission from the transmitter. The position of the mobile craft is deduced at the intersection of the ellipsoids defined by the foci constituted by the transmitters Ei from which signals are received and the receiver or receivers Rj. The disclosed method can be applied to the detection of an aircraft.

Growing community of inventors

Le Perreux sur Marne, France

Dominique Heurguier