Patents by Inventor Daniel Pommier

Daniel Pommier has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5452288
    Abstract: A method for the transmission of digital data elements including radio paging information elements, wherein the data elements are transmitted according to a technique of transmission implementing a plurality of orthogonal carrier frequencies (the COFDM technique), the signal being organized in frames comprising, firstly, at least one first channel called a fast information channel, comprising at least one symbol of data elements, the carrier frequencies of the symbols being modulated by data elements that are not temporally interleaved, and at least one second channel, called a main channel, comprising at least one symbol of data elements, the carrier frequencies of the symbols being modulated by data elements that are temporally interleaved beforehand, a frame number belonging to a set of predefined frame numbers being regularly inserted into the fast information channel, each of the radio paging receivers being assigned at least one of the frame numbers.
    Type: Grant
    Filed: April 6, 1993
    Date of Patent: September 19, 1995
    Assignees: France Telecom, Telediffusion de France
    Inventors: Jean-Claude Rahuel, Daniel Pommier
  • Patent number: 5357502
    Abstract: A device for the reception of digital data broadcast at a high bit rate for reception by mobile receivers is disclosed. The device operates under adverse conditions of multiple propagation corresponding to the Rayleigh process and imperfect frequency tuning to minimize the inter-symbol interference in the frequency domain. The device receives a digital signal having digital elements distributed in the frequency-time space f-t and transmitted in the form of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of digital elements and broadcast simultaneously. The device includes a module for transposition by a local oscillator, baseband filtering and analog-digital conversion, a temporal windowing module for the selection of the useful samples and a mathematical transformation module, the temporal windowing module applying a Nyquist window type of temporal window with non-zero roll-off.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: October 18, 1994
    Assignee: France Telecom and Telediffusion de France SA
    Inventors: Damien Castelain, Joel Richard, Roselyne Halbert-Lasselle, Daniel Pommier
  • Patent number: 5228025
    Abstract: A method for the broadcasting of digital data, in channels to which multiple paths are assigned, the characteristics of which vary in time, with time-frequency interlacing and assistance in the acquisition of the automatic frequency control. This method is one of the type providing for the distribution of the data in the form of digital elements in the frequency-time space f-t and the transmission of frames of symbols each constituted by a multiplex of N orthogonal carrier frequencies modulated by a set of the digital elements and broadcast simultaneously, the method providing for the transmission of a pattern of frequency synchronization, recurrent in time. It can be applied notably for radio broadcasting at a high bit rate towards mobile receivers, and for example, to COFDM radio broadcasting.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: July 13, 1993
    Assignees: Centre National d'Etudes des Telecommunications, Telediffusion de France
    Inventors: Bernard Le Floch, Jean-Christophe Rault, Daniel Pommier, Damien Castelain
  • Patent number: 5191576
    Abstract: A method for the diffusion of digital data designed to be received notably by mobile receivers moving in an urban environment, that is, in the presence of stray signals and jamming, and in conditions of multiple propagation (Rayleigh process) providing an optimized mode of setting up the frame structure of the broadcast signal, so as to derive the maximum benefit from the resistance of the system to pulsed stray signals and to jamming. The header of each frame has a first empty synchronization symbol and eventually a second, unmodulated wobbled signal forming a two-stage analog synchronization system. So, the recovery of synchronization is achieved in an analog way, without prior extraction of a clock signal at the binary level. The constitution of the sequence of the useful symbols in the frame results from temporal and sequential interlacing operations, combined to obtain an implicit de-interlacing at the receiver.
    Type: Grant
    Filed: October 17, 1991
    Date of Patent: March 2, 1993
    Assignee: L'Etat Francais and Telediffusion de France S.A.
    Inventors: Daniel Pommier, Bernard LeFloch
  • Patent number: 4884139
    Abstract: Digital broadcasting of a sound program takes place in a channel of a set of channels. In each channel other than that dedicated to digital broadcasting, the television channel has a spectrum of spectral lines separated by low spectral power density intervals. Digital broadcast is achieved by digital modulation (for instance OFDM) of the transmission with frequency multiplexing using a spectrum interlaced with that of the television. The digital signal is recovered by comb filtering on reception.
    Type: Grant
    Filed: December 23, 1987
    Date of Patent: November 28, 1989
    Assignee: Etat Francais, Represente Par Le Secretariat D'etat Aux Post Es Et Telecommunications (Centre National D'etudes Des Telecommunications)
    Inventor: Daniel Pommier
  • Patent number: 4881241
    Abstract: A digital broadcasting process, suitable for digital audiobroadcast, comprises encoding the data in the form of binary words using a redundant code to obtain a sequence of modulation symbols and transmitting the symbols in a plurality of subchannels at different frequencies. The symbols are time interlaced with such a distribution that two adjacent symbols cannot be transmitted in time succession and at the same one of the frequencies. Preferably, a Viterbi decoder is used. Particular construction of an emitter and a receiver are also described.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: November 14, 1989
    Assignees: Centre National d'Etudes des Telecommunications, Telediffusion de France
    Inventors: Daniel Pommier, Michel Alard
  • Patent number: 4821261
    Abstract: For full time transmission of digital signals, in the form of successive bits, over a satellite broadcasting channel, two multiplexes each having a bandwidth substantially half that of the channel are transmitted on two quadrature carriers, with four phase type modulation and with symbols offset on the two carriers. At reception one of the multiplexes is demodulated by phase demodulation, phase differential demodulation or phase coherent demodulation, with physical separation of one binary element out of two.
    Type: Grant
    Filed: July 30, 1986
    Date of Patent: April 11, 1989
    Assignee: Etat Francais, Etablissement Public de Telediffusion
    Inventor: Daniel Pommier
  • Patent number: 4688218
    Abstract: A digital data pack transmission system is especially--but not exclusiveluseful in videotex or teletext transmission (i.e. videotext or teletext data is transmitted during intervals between segments of video signals). The inventive system uses a continuous transmission carrier. A plurality of data packs are individually included in each block of data which is periodically transmitted. Dummy packs are used to fill the blocks, if less than a full complement of packs is required. The time periods available for the transmission of blocks of data are exactly equal to or a little longer than the maximum length of the transmitted blocks. The beginning of each data block has a synchronization bit pattern which is constituted by a "bit sync" byte followed by a "byte sync" byte. Except for the synchronizing pattern, the signals are scrambled before transmission and descrambled upon receipt and recognization of the data.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: August 18, 1987
    Assignee: Etablissement Public de Diffusion Dit "Telediffusion de France"
    Inventors: Joseph Blineau, Daniel Pommier, Claude Thomas
  • Patent number: 4583047
    Abstract: The circuit comprises a surface acoustic wave device. On the substrate (32) f the surface acoustic wave device, are provided two pairs of input transducers (33, 34, 35, 36) connected, in parallel, to the input of the circuit. The transducers (33, 34, 35, 36) initiate surface acoustic waves corresponding to the signals applied on two pairs of paths (41, 42, 43, 44) ending at two pairs of reception transducers (37, 38, 39, 40). The outputs of the output transducers of the first pair (37, 38) are connected to the two inputs of a mixer (28) whose output yields the received digital signal. The outputs of the second pair of transducers (39, 40) are connected to the inputs of two limiters (26, 27) whose outputs are connected to the two inputs of a mixer (29) whose output yields the analog signal.
    Type: Grant
    Filed: October 9, 1984
    Date of Patent: April 15, 1986
    Assignee: Etablissement Public de Diffusion dit "Telediffusion de France"
    Inventors: Jeannine Le Goff epouse Henaff, Jacques Veillard, Daniel Pommier
  • Patent number: 4426710
    Abstract: To obtain a duo-binary FSK modulation, the modulating binary signal train has a three state partial response and is fed through a precoding, a transition-type coding, a simplified MSK modulation at the carrier frequency, a frequency division by two, and a multiplication by the same signal delayed by one binary element period. In order to obtain a "tamed FSK" modulation, the modulating binary signal train has a five state partial response and is fed through precoding, a transition-type coding, a simplified MSK modulation at the carrier frequency, a frequency division by two, a multiplication by the same signal delayed, for one part, by one binary element period and, for the other part, by two binary element periods. A TFM modulation is obtained by using the FSK duo-binary generating process, but a wave shaping filter is connected between the division by two circuit and the multiplication circuit.
    Type: Grant
    Filed: September 17, 1981
    Date of Patent: January 17, 1984
    Assignees: L'Etat Francais, represente par le Secretaire d'Etat aux Postes et Telecommunications (Centre des Telecommunications), National d'Etudes and Etablissement Publie de Diffusion dit "Telediffusion de France"
    Inventor: Daniel Pommier