Thales

Imperial College of Science, Technology and Medicine

Institut Mines-telecom

Teknologian Tutkimuskeskus Vtt

Etat Francais Represente Par Le Delegue General Pour L'armement

Celeno Communications Ltd.

François Delaveau

Nir Shapira

Pascal Chevalier

François Pipon

Dominique Heurguier

Dieudonné Josset

Anne Ferreol

Jean-Claude Belfiore

Eric Garrido

Philippe Painchault

Frédérique Ywanne

Bertrand Gerfault

Jean Martinelli

Patrick Goguillon

Philippe Viravau

Dominique Robin

Emmanuel Gross

Philippe Buscailhon

Domininique Heurguier

Pipon Francois

François Sirven

Alain Sibille

Cécile Germond

Dominique Heurgier

Cyrille Le Meins

Sébastien Mallier

Christophe Thizon

Adrian Kotelba

Jani Suomalainen

Claude LEMÉNAGER

Cong Ling

Bernard Barbet

Pierre Muris

Pierre-Antoine Garcia

Christiane Kameni

Sonia Belaid

Renaud MOLIÈRE

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 is provided for selectively, dynamically and adaptively jamming the third-party radio communications that are external to a radio communication network to be protected, which optimizes the effectiveness of the jamming of P predefined areas or positions in a network of transmitters, and which uses closed-loop control to limit fratricidal effects on certain platforms having telecommunication transmitters/receivers to be preserved.

Method for jamming communications in a closed-loop control network

A method for measuring certain parameters of the impulse response of a propagation channel involving emitters and reflectors that are fixed or mobile, and for detecting and determining the parameters regarding the position and kinematics of the emitters and reflectors, or for auto-locating the reception system implementing the invention, in a system comprising N sensors receiving signals from the emitters or from the reflection on the reflectors. The method determines an ambiguity function which couples the spatial analysis and the delay-distance/Doppler-kinematic analysis, and determines at least one sufficient statistic &#x108;(l,m,K) corresponding to the correlation between the known signal s(kTe) corresponding to the complex envelope of the signal emitted and the output of a filter w(l,m) where l corresponds to a temporal assumption and m corresponds to a frequency assumption. The method also determines the values of the pair (l,m) by comparing the value of the statistic for the pair (l,m) with a threshold value.

Methods and devices for determining the impulse response of propagation channels involving emitters, reflectors and sensors that are fixed or mobile

A method of synchronizing a substantially rectilinear signal being propagated through an unknown channel, in the presence of unknown substantially rectilinear interferences, received by an array of N sensors, in which a known training sequence s(nT) is used comprising K symbols and sampled at the symbol rate T (s(nT), 0&#x2266;n&#x2266;{tilde over (K)}1), characterized in that, based on observations x((n+l/p)T) over the duration of the training sequence, where p=T/Te is an integer and Te the sampling period, a virtual observation vector X((n+l/p)T)=[x((n+l/p)T), x((n+l/p)T)]is defined, as well as a decision criterion or decision statistic taking into account the second-order non-circular nature of the interferences, by using the first and second correlation matrices of the virtual observation vector X((n+l/p)T).

Method and device for synchronizing rectilinear or quasi-rectilinear links in the presence of interference

The invention relates to a method and system for controlling and analyzing cellular radio communications exchanged between mobile terminals and base stations BTS. The invention is characterized in that a dummy mobile terminals and base stations BTS. The invention is comprising a dummy mobile telephone network RRTM_F comprising a dummy base station BTS_F and a dummy mobile terminal MS_F are inserted into the real network RRTM_R, said dummy network being responsible for the decoding and transparent synchronous relaying of messages exchanged between the real network and the real mobile as well as real mobile access control from the real network or the dummy network.

Method of controlling and analyzing communications in a telephone network

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.

Method for the multistatic detection and locating of a mobile craft through the use of digital broadcasting transmitters

A method for the detection of Msources common to several observations(t) and(t) within a single array of sensors, the observations having different lengths Nand N, comprises at least the following steps: defining a law of likelihood V([M=M]/M) substantially equal to the chi-2 law with 2(N&#x2212;M)(N&#x2212;M) degrees of freedom with N&#x2266;N, dim{(t)}=N&#xd7;1 and dim{(t)}=N&#xd7;1; determining a detection threshold &#x3b1;in order to obtain a low probability of false alarms and a number of degrees of freedom that takes account of the lengths Nand Nand of the number of sources M; determining the presence and/or the number of the sources Min applying the law of likelihood and the threshold &#x3b1;. The method and device can be applied to the determining of the presence and/or the number of sources common to at least two observations having different lengths in a GSM type radiocommunications system.

Method and device for the detection of sources in a communications system

Method and device for the detection of one or more mobiles within a communications network, the method comprising at least one step for the 'acquisition' of at least one RACH type signal exchanged between a mobile and a base station of the network and a step to measure the angle of arrival of the signal, the measurement step being synchronized with a parameter of the exchanged signal. Application to the GSM network.

Method and device for the location of a mobile telephone in a communications network

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Le Perreux sur Marne, France

François Delaveau