Abstract: The invention concerns an opto-electronic device for observing and/or aiming at a scene comprising a target (C), comprising an observation module (1) comprising an image sensor (10) and a stabiliser (11) for a line of sight (100) towards the target (C); and a telemeter (2) comprising a multi-shot pulsed laser (20) for emitting a plurality of outward laser pulses (An) in the direction of the target (C) to be telemetered, and a detector (21) for a plurality of return laser echoes (Rn) reflected by the scene in order to generate an electrical signal for each return laser echo (Rn) in order to effect a measurement of the distance to the target (C), each return laser echo (Rn) corresponding to an outward laser pulse (An); characterised in that it also comprises a sensor (3) of angular movement of the device with respect to the stabilised line of sight (100) in order to determine an angular radius (?n) of each outward laser pulse (An) with respect to the stabilised line of sight (100); and a selector (4)

Abstract: The invention concerns an opto-electronic device for observing and/or aiming at a scene comprising a target (C), comprising an observation module (1) comprising an image sensor (10) and a stabiliser (11) for a line of sight (100) towards the target (C); and a telemeter (2) comprising a multi-shot pulsed laser (20) for emitting a plurality of outward laser pulses (An) in the direction of the target (C) to be telemetered, and a detector (21) for a plurality of return laser echoes (Rn) reflected by the scene in order to generate an electrical signal for each return laser echo (Rn) in order to effect a measurement of the distance to the target (C), each return laser echo (Rn) corresponding to an outward laser pulse (An); characterised in that it also comprises a sensor (3) of angular movement of the device with respect to the stabilised line of sight (100) in order to determine an angular radius (?n) of each outward laser pulse (An) with respect to the stabilised line of sight (100); and a selector (4)

Abstract: The filtering coefficients of a frequency domain stereophonic echo canceller are adapted by a method which takes account of the cross-correlation between the input signals relating to the two channels. In particular, the adaptation process takes account of the coherence function, reducing the problems commonly encountered with stereophonic cancellation schemes when relatively correlated input signals occur.

Abstract: In a method of handing off traffic in a low orbit satellite communication system serving terminals, a terminal being connected to a terrestrial communication network by means of a connection station, handing off of the satellite-terminal and satellite-connection station links is possible only within a particular area. The decision to hand off the traffic is based on deterioration of the quality of service and of the radio environment for a group of terminals of said area. The system for implementing this method includes transmit/receive terminals and terrestrial connection stations.

Abstract: The present invention relates to a communications system between low-orbit satellites and terminals, in which the beams (12) of each service area (14) are illuminated according to a beam-hopping spatial scanning. For each satellite and for each terminal transmission and reception are separated in time and synchronized. Time-division duplex is used. Applicable especially to the field of space telecommunications.

Abstract: In a method of handing off traffic in a low orbit satellite communication system serving terminals, a terminal being connected to a terrestrial communication network by means of a connection station, handing off of the satellite-terminal and satellite-connection station links is possible only within a particular area. The decision to hand off the traffic is based on deterioration of the quality of service and of the radio environment for a group of terminals of said area. The system for implementing this method includes transmit/receive terminals and terrestrial connection stations.