Patents by Inventor Laurent Hendrichs

Laurent Hendrichs 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).

  • System and method for reducing power consumption by spectral shaping of signals
    Patent number: 7133419
    Abstract: The present invention provides a system and method for reducing power consumption by shaping the spectrum of a downstream signal. Incremental improvements in power consumption due to spectral shaping produces a noticeable reduction in the aggregate power consumed at a central office in asymmetric digital subscriber line (ADSL) systems.
    Type: Grant
    Filed: May 3, 2002
    Date of Patent: November 7, 2006
    Assignee: Conexant, INc.
    Inventors: Laurent Hendrichs, William Scholtz
  • System and method for tone detection in a discrete multi-tone system
    Patent number: 6760348
    Abstract: The present invention is directed to a system and method for determining when a particular tone in a discrete multi-tone communications system is being used to transmit a control signal. Broadly, the system and method of the present invention are realized by a digital signal processor that is configured to detect a constant phase shift on individual tones when a control signal condition is present.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: July 6, 2004
    Assignee: Globespanvirata, Inc.
    Inventors: Laurent Hendrichs, Hubert de Lassus
  • System and method for controlling distortion in the POTS band in a dual POTS and discrete multi-tone communication system
    Patent number: 6646994
    Abstract: The present invention is directed to a system and method for minimizing signal distortion in a discrete multi-tone communications system that is being used in both the POTS and the ADSL frequency bands. Broadly, the system and method of the present invention are realized by a digital signal processor that is configured to insert a probe signal into the upstream channels of the communication system, measure the resulting signal distortion in the downstream channels, and adjust the upstream signal power to minimize system signal distortion due to the upstream data transmission. The system and method further estimates the POTS band signal distortion based on the measured distortion at the higher frequencies, and adjusts the output signal power at the central office equipment to minimize signal distortion at the customer premises.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: November 11, 2003
    Assignee: Globespanvirata, Inc.
    Inventors: Laurent Hendrichs, Hubert de Lassus
  • System and method for profile selection during fast retrain of a wideband modem
    Patent number: 6587502
    Abstract: The present invention is directed to a system and method that efficiently, accurately, and quickly detects a suitable stored fast retrain profile to permit the resumption of ADSL communications in the presence of changing line conditions in a dual POTS/ADSL communications system. The method of the present invention is based on measuring the amplitude and phase of a few discrete multi-tone tones in the receiver portion of a communications system and recording the number of times a profile is selected to replace a preceding profile. Broadly, the system and method of the present invention are realized by a digital signal processor that is configured to detect a fast retrain request, select a suitable stored profile, and apply the parameters associated with the selected profile to configure the customer premises modem.
    Type: Grant
    Filed: December 23, 1999
    Date of Patent: July 1, 2003
    Assignee: GlobespanVirata, Inc.
    Inventors: Laurent Hendrichs, Hubert de Lassus