Patents by Inventor Francois Langinieux

Francois Langinieux 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: 6470030
    Abstract: An OFDM receiver system for performing precise OFDM demodulation is provided. The OFDM receiver system performs demodulation by sharing memories and operators in a time-divisional manner. FFT-processed data is separated into specific pilot signals and data according to the timing indicated by a controller to then be rearranged and stored, thereby facilitating extraction of corresponding pilot signals and data for various synchronization and equalization steps. Therefore, the demodulation system having an optimal structure can be realized in view of resource utilization efficiency and chip areas, the cost and time for fabricating and designing the system can be reduced, and verification of the system can be easily performed.
    Type: Grant
    Filed: March 3, 1999
    Date of Patent: October 22, 2002
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Jae Hyeok Park, Yeong Sang Kim, Jean Jacques Michel, Francois Langinieux, Olivier Dejonghe
  • Patent number: 6172993
    Abstract: A frame synchronization method and apparatus for use in a digital communication system utilizing OFDM method are disclosed. The frame synchronization apparatus comprises a phase calculator for calculating phase values of TPS pilots within a symbol according to in-phase and quadrature-phase channel signals received from a transmitting side; a D-BPSK demodulator for performing D-BPSK demodulation for the phase values of TPS pilots supplied from the phase calculator and outputting the TPS pilots within the demodulated symbol; a control signal generator for comparing the demodulated TPS pilots with each other and outputting a control signal according to the compared result; and frame synchronization unit for confirming a sync word position according to the control signal supplied from the control signal generator and outputting a frame sync signal.
    Type: Grant
    Filed: December 1, 1997
    Date of Patent: January 9, 2001
    Assignee: Daewoo Electronics Co., Ltd.
    Inventors: Young-Sang Kim, Francois Langinieux