Patents by Inventor Bernard Piaget

Bernard Piaget 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: 7633997
    Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.
    Type: Grant
    Filed: May 15, 2008
    Date of Patent: December 15, 2009
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
  • Patent number: 7532691
    Abstract: This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (Rp, Ri) with means for calculating a weighted sum of stored samples in the registers, p weighted sums (Skp, Ski) may be obtained and recombined with number p being, for example, equal to 2.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: May 12, 2009
    Inventors: Sébastien Leveque, Norbert Daniele, Didier Lattard, Bernard Piaget
  • Publication number: 20080219284
    Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.
    Type: Application
    Filed: May 15, 2008
    Publication date: September 11, 2008
    Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE
    Inventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
  • Patent number: 7391806
    Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterized in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronization signals and power control signals corresponding to each detected new source.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: June 24, 2008
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
  • Patent number: 7388902
    Abstract: A method for receiving spectrum spreading signals using a Doppler-effect frequency-shift correction generates a corrective signal based on an estimation of a modulation period related to the Doppler effect detected in a preamble portion of a received signal. The corrective signal is used for correcting an information portion of the received signal. Base band digital signals are operated upon by using the DOT and CROSS components.
    Type: Grant
    Filed: August 31, 2006
    Date of Patent: June 17, 2008
    Assignee: Xantima LLC
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Didier Lattard
  • Patent number: 7388901
    Abstract: A method for receiving spectrum spreading signals using a Doppler-effect frequency-shift correction generates a corrective signal based on an estimation of a modulation period related to the Doppler effect detected in a preamble portion of a received signal. The corrective signal is used for correcting an information portion of the received signal. Base band digital signals are operated upon by using the DOT and CROSS components.
    Type: Grant
    Filed: January 13, 2006
    Date of Patent: June 17, 2008
    Assignee: Xantima LLC
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Didier Lattard
  • Publication number: 20070110141
    Abstract: A method for receiving spectrum spreading signals using a Doppler-effect frequency-shift correction generates a corrective signal based on an estimation of a modulation period related to the Doppler effect detected in a preamble portion of a received signal. The corrective signal is used for correcting an information portion of the received signal. Base band digital signals are operated upon by using the DOT and CROSS components.
    Type: Application
    Filed: August 31, 2006
    Publication date: May 17, 2007
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Didier Lattard
  • Publication number: 20070086510
    Abstract: This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (Rp, Ri) with means for calculating a weighted sum of stored samples in the registers, p weighted sums (Skp, Ski) may be obtained and recombined with number p being, for example, equal to 2.
    Type: Application
    Filed: June 5, 2006
    Publication date: April 19, 2007
    Inventors: Sebastien Leveque, Norbert Daniele, Didier Lattard, Bernard Piaget
  • Publication number: 20060133459
    Abstract: Method for receiving spectrum spreading signals with frequency shift correction. According to the invention, the modulation period related to the Doppler effect is estimated by using a preamble and a correction signal is elaborated, the signal transmitting the information is then corrected by this correction signal. Base band digital signals are operated upon by using the DOT and CROSS components. Application to digital transmissions.
    Type: Application
    Filed: January 13, 2006
    Publication date: June 22, 2006
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Didier Lattard
  • Patent number: 7058119
    Abstract: This invention relates to parallel architecture digital filter and signal receiver with spectrum spreading using such a filter, the filter may have p shift registers (Rp, Ri) with means for calculating a weighted sum of stored samples in the registers, p weighted sums (Skp, Ski) may be obtained and recombined with number p being, for example, equal to 2.
    Type: Grant
    Filed: November 8, 1999
    Date of Patent: June 6, 2006
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Sebastien Leveque, Norbert Daniele, Didier Lattard, Bernard Piaget
  • Patent number: 6999502
    Abstract: The present invention relates to a method for receiving CDMA signals with synchronization being obtained through double delayed multiplication, and an associated receiver. According to the invention, the correlation signal undergoes double delayed multiplication. Synchronization is established on the signal thus generated. Applied to digital communications, in particular with mobile phones.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 14, 2006
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Christophe Boulanger, Jean-René Lequepeys, Bernard Piaget, Roselino Lionti
  • Patent number: 6987796
    Abstract: A method for receiving spectrum spreading signals with frequency shift correct in which the modulation period related to the Doppler effect is estimated by using a preamble and a correction signal is elaborated, the signal transmitting the information is then corrected by this correction signal.
    Type: Grant
    Filed: December 21, 1999
    Date of Patent: January 17, 2006
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Didier Lattard
  • Publication number: 20040047315
    Abstract: The invention relates to a device for exchanging digital data between several sources and at least one hub in a CDMA system, characterised in that it comprises a number n of digital transmission/reception circuits (1) installed in parallel, each circuit (1) comprising a transmitter (2i) comprising means of generating an integer number Nc of codes that will be used for spectral spreading of data to be transmitted and a receiver (4i) comprising means (46, 48) of detecting the access of new sources to the CDMA system transmission channel and means (49) of generating synchronisation signals and power control signals corresponding to each detected new source.
    Type: Application
    Filed: June 19, 2003
    Publication date: March 11, 2004
    Inventors: Didier Lattard, Didier Varreau, Bernard Piaget, Marc Laugeois
  • Patent number: 6621856
    Abstract: A method of parallel suppression of interference, and corresponding stage and receiver is disclosed according to the invention, parallel suppression of interference is carried out starting from the signals selected by a maximum likelihood criterion based on the calculation of a metric and the search for the smallest possible metric.
    Type: Grant
    Filed: September 10, 1999
    Date of Patent: September 16, 2003
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Charles Fort
  • Patent number: 6347112
    Abstract: A circuit able to operate either as a direct sequence spread spectrum differential signal emitter, or as a generator of interference signals corresponding to multiple access noise. The circuit employs a clock signal formation and data processing module, a differential coding module, a multiplexing module, and a direct sequence spread module when operating as a spread spectrum emitter, and has an additional amplification-inversion module for use when generating an interference signal.
    Type: Grant
    Filed: October 5, 1998
    Date of Patent: February 12, 2002
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Didier Lattard, Jean-René Lequepeys, Didier Varreau, Bernard Piaget
  • Patent number: 6115413
    Abstract: A differential receiver which receives a signal corresponding to transmission of a carrier modulated by symbols S.sub.k, where k is an integer designating an order of the symbol, each symbol S.sub.k has a duration Ts and carries information, and the symbols S.sub.k have been multiplied by a psuedorandom sequence. The differential receiver includes a first processing channel configured to receive a first part of the transmitted signal in phase with the carrier to generate samples I.sub.k and delayed samples I.sub.k-1. The receiver further includes a second processing channel configured to receive a second part of the transmitted signal in phase quadrature with the carrier to generate samples Q.sub.k and delayed samples Q.sub.k-1. In addition, the receiver includes a multiplication circuit configured to generate a signal Dot(k) equal to I.sub.k I.sub.k-1 +Q.sub.k Q.sub.k-1 and a signal Cross(k) equal to Q.sub.k I.sub.k-1 -I.sub.k Q.sub.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: September 5, 2000
    Assignee: Commissariat a L'Energie Atomique
    Inventors: Didier Lattard, Jean-Rene Lequepeys, Norbert Daniele, Bernard Piaget
  • Patent number: 5870425
    Abstract: A Differential receiver of direct sequence spread spectrum signals, wherein, the intermediate frequency stage comprises N filtering and amplifying channels in N separate bands. The amplification of a channel is adjusted so that the power levels delivered by the channels correspond to a predetermined power distribution law.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: February 9, 1999
    Assignee: Commissariat A L'Energie Atomique
    Inventors: Bernard Piaget, Charles Fort, Patrick Le Masson
  • Patent number: 5799035
    Abstract: The circuit has two parallel channels for the processing of two components in phase (I) and in quadrature (Q). Each channel has filtering means (50(I)) and delay means (60(I)). The circuit also incorporates a multiplication circuit (70), an integration circuit (80) and a programming circuit (90). Several circuits of this type can be connected in cascade.
    Type: Grant
    Filed: November 12, 1996
    Date of Patent: August 25, 1998
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Didier Lattard, Jean Rene Lequepeys, Bernard Piaget, Norbert Daniele
  • Patent number: 4467237
    Abstract: Multielement ultrasonic probe production process connecting a piezoelectric ceramic block incorporating an upper conductive layer and a lower layer to two printed circuits having a metallized face and a face provided with conductive strips, electrically connecting one of the conductive strips to one of the faces of the printed circuits and the other conductive strip to the other face of said circuits, cutting out said block and the upper part of said circuits so as to form equidistant piezoelectric elements and mechanically insulating them from one another, as well as the connections with respect to each element.The invention has application to medical echography.
    Type: Grant
    Filed: June 10, 1981
    Date of Patent: August 21, 1984
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Bernard Piaget, Jean-Francois Piquard
  • Patent number: RE41107
    Abstract: A method of parallel suppression of interference, and corresponding stage and receiver is disclosed according to the invention, parallel suppression of interference is carried out starting from the signals selected by a maximum likelihood criterion based on the calculation of a metric and the search for the smallest possible metric.
    Type: Grant
    Filed: September 16, 2005
    Date of Patent: February 9, 2010
    Assignee: Commissariat a l'Energie Atomique
    Inventors: Christophe Boulanger, Laurent Ouvry, Bernard Piaget, Charles Fort