Abstract: Method for generating an OFDM training sequence, device and computer program product. The OFDM training sequence consists of at least two OFDM symbols, and the OFDM training sequence comprises at least two OFDM sub-carriers, the method comprising a step of partitioning the OFDM sub-carriers into at least two separate groups comprising at least one sub-carrier, a number of groups being smaller than a number of sub-carriers. The method comprises steps, carried out independently for each group, of generating an elementary sequence associated with a group by combining the sub-carriers of the group, the elementary sequence having a duration equal to a duration of one of the at least two symbols.

Abstract: Method for generating an OFDM training sequence, device and computer program product. The OFDM training sequence consists of at least two OFDM symbols, and the OFDM training sequence comprises at least two OFDM sub-carriers, the method comprising a step of partitioning the OFDM sub-carriers into at least two separate groups comprising at least one sub-carrier, a number of groups being smaller than a number of sub-carriers. The method comprises steps, carried out independently for each group, of generating an elementary sequence associated with a group by combining the sub-carriers of the group, the elementary sequence having a duration equal to a duration of one of the at least two symbols.

Abstract: Method for compressing a sequence of images comprising a first image and a second image, the method comprising the steps of: generating a first descriptor comprising parameters for displaying a computer-generated graphical element in the first image, the graphical element being of non-photographic origin, and the display parameters not comprising pixel values; processing the second image so as to determine an event which gave rise to a potential variation in the parameters for displaying the graphical element between the first image and the second image; generating a second descriptor comprising an event code indicating the determined event.

Abstract: The invention relates to a method for locating a transmitter, which is implemented in a processing unit of a processing station of a locating system.

Abstract: Method for processing a sequence of digital signal samples including a first sub-sequence and a second sub-sequence. Forming a first block of samples comprising the first sub-sequence and a second block of samples comprising header samples followed by the second sub-sequence. Demodulating the first block of samples through a digital demodulator to produce a first block of symbols, and the second block of digital signal samples through a second digital demodulator to produce a second block of symbols. The second demodulator implementing a carrier synchronisation or symbol rate synchronisation starting with the header samples, which comprise samples in a number adapted in such a way that the synchronisation is effective before the second demodulator demodulates the second sub-sequence. Reconstructing a sequence of symbols by concatenating the first symbol block with the second symbol block.

Abstract: A method of date-stamping reception of digital data of a signal coherently modulating the carrier or sub-carrier, and utilizing the properties of such a modulation to improve the date-stamping thereof. Thereby accurately correcting the date-stamping of a pilot sequence (known pattern), and reducing the variance on the date-stamping of the transitions of the bits.

Abstract: A calibrated measurement of the angular misalignment x of a radiofrequency antenna pointing towards a slow mobile, radio transmitter along an antenna axis, the antenna being in radio communication with the mobile. The measurement includes receiving of radiofrequency signals derived from the mobile during a period of the applied path, the signal being received on a frequency band lower than or equal to the frequency of the transmitted signal; determining, on a logarithmic scale, of the instantaneous power of the received signal; harmonic decomposition over each period of the power thus determined into a fundamental component and at least one harmonic component; and estimating of the angular misalignment x from the ratio between the fundamental term and a harmonic component.

Abstract: The invention relates to a method for receiving a CPM signal with space-time encoding, preferably a SOQPSK-TG signal based on the IRIG-106 recommendation, emitted by two emission antennas A1, A2, wherein the received signal modulates a plurality of bits bi(j) j=0 or 1 and corresponds to the bits emitted on the antennas A1 and A2, respectively, said received signal comprising a temporal offset ??, said signal being received on one or a plurality of receiving antennas A3; —obtaining a digital signal y(k), which is sampled, and the offset version ???(k) thereof on an antenna, taking into account the temporal offset between the two antennas, each comprising the contributions of the signals originating from the two emission antennas, wherein said digital signals can be expressed according to the following decomposition: formula (I).

Abstract: The invention relates to a method of date-stamping reception of digital data of a modulated signal, said signal resulting from the modulation of a carrier or sub-carrier by a digital signal, the bitrate of symbols of the digital signal being an integer sub-multiple N of the frequency of the carrier or sub-carrier, said method comprising the steps consisting in: —coherent demodulation by means of a phase loop of a plurality of samples sm(k) of the modulated signal and obtaining of a plurality of demodulated samples sdm(k) and of the phase of the reconstructed carrier; —association of the plurality of demodulated samples sdm(k) with the simultaneous phase ?(k) of the reconstructed carrier —determination of a plurality of dates of passage to a determined value ?0 of the phase of the reconstructed carrier, relative to the date of reception of at least one sample sm(k), according to a time shift during which the carrier rotates from ?(k) to ?0.

Abstract: The invention concerns a data acquisition device (10) comprising a casing (11) defining a cavity (20), and a plurality of electronic modules (12) suitable for being stacked in the cavity (20), each electronic module (12) having a first face and a second face opposite the first face, and comprising a first set of conductive tracks extending over the first face, and a second set of conductive tracks sending over the second face, the first set of conductive tracts comprising at least one conductive track for transmitting a data signal, and the second set of conductive tracks comprising at least one conductive track for transmitting the data signal, making it possible to propagate the data signal from one module to another through the entirety of the stack, whatever the order of stacking of the electronic modules (12) in the cavity (20).

Abstract: The invention relates to an actuator (1) comprising: a body (4), a first element (5) mounted such that it can move rotatably in relation to said body (4), and a second element (6) mounted such that it can move translatably in relation to said body (4), either the first element (5) or the second element (6) being a screw and the other one being a nut, the nut cooperating with the screw such that a rotation of the first element (5) in relation to the body (4) around an axis of rotation (X) causes the translation of the second element (6) in relation to the body (4) parallel to the axis of rotation (X), a cylinder which is stationary in relation to the first element (5), a piston mounted such that it can move translatably inside the cylinder between a first end position and a second end position, and a cam surface which is stationary in relation to the body (4) and against which the piston is supported such that a rotation of the first element (5) in relation to the body (4) causes a translatory back-and-forth m

Abstract: Method for processing a sequence of digital signal samples comprising a first sub-sequence and a second sub-sequence, said method comprising: forming (106) a first block of samples comprising the first sub-sequence and a second block of samples comprising header samples followed by the second sub-sequence; demodulating (108) the first block of samples through a digital demodulator to produce a first block of symbols, and the second block of digital signal samples through a second digital demodulator to produce a second block of symbols, the second demodulator implementing a carrier synchronisation or symbol rate synchronisation starting with the header samples (E6-E9), which comprise samples in a number adapted in such a way that the synchronisation is effective before the second demodulator demodulates the second sub-sequence; and reconstructing (114) a sequence of symbols by concatenating the first symbol block with the second symbol block.

Abstract: The invention concerns a data acquisition device (10) comprising a casing (11) defining a cavity (20), and a plurality of electronic modules (12) suitable for being stacked in the cavity (20), each electronic module (12) having a first face and a second face opposite the first face, and comprising a first set of conductive tracks extending over the first face, and a second set of conductive tracks sending over the second face, the first set of conductive tracts comprising at least one conductive track for transmitting a data signal, and the second set of conductive tracks comprising at least one conductive track for transmitting the data signal, making it possible to propagate the data signal from one module to another through the entirety of the stack, whatever the order of stacking of the electronic modules (12) in the cavity (20).

Abstract: The invention relates to an actuator (1) comprising: a body (4), a first element (5) mounted such that it can move rotatably in relation to said body (4), and a second element (6) mounted such that it can move translatably in relation to said body (4), either the first element (5) or the second element (6) being a screw and the other one being a nut, the nut cooperating with the screw such that a rotation of the first element (5) in relation to the body (4) around an axis of rotation (X) causes the translation of the second element (6) in relation to the body (4) parallel to the axis of rotation (X), a cylinder which is stationary in relation to the first element (5), a piston mounted such that it can move translatably inside the cylinder between a first end position and a second end position, and a cam surface which is stationary in relation to the body (4) and against which the piston is supported such that a rotation of the first element (5) in relation to the body (4) causes a translatory back-and-forth m