Patents by Inventor Karen Hovakimyan

Karen Hovakimyan 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).

  • Optical communication systems and methods of operating such optical communication systems
    Publication number: 20070104484
    Abstract: An optical communication system includes a first optical device including a transmission optical switch and a controller coupled to the transmission optical switch, and a second optical device coupled to the first optical device via each of a first fiber and a second fiber. The transmission optical switch is configured to operate in one of a first mode associated with the first fiber and a second mode associated with the second fiber based on control signals generated by the controller. Moreover, the controller is configured to perform a non-revertive switching operation on the transmission optical switch based on the satisfaction or the non-satisfaction of a predetermined condition or a plurality of predetermined conditions.
    Type: Application
    Filed: November 4, 2005
    Publication date: May 10, 2007
    Inventors: Karen Hovakimyan, Danzhu Wu
  • Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon Lagrange interpolation
    Patent number: 6801582
    Abstract: An apparatus for pre-distorting a signal includes input nodes to receive an in-phase input signal and a quadrature input signal. Feedback nodes receive an in-phase feedback signal and a quadrature feedback signal. Output nodes transmit an in-phase pre-distorted signal and a quadrature pre-distorted signal. A Lagrange interpolation digital pre-distortion circuit is connected to the input nodes, the feedback nodes, and the output nodes. The Lagrange interpolation digital pre-distortion circuit is configured to perform a Lagrange interpolation on the in-phase input signal, the quadrature input signal, the in-phase feedback signal, and the quadrature feedback signal to produce the in-phase pre-distorted signal and the quadrature pre-distorted signal.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: October 5, 2004
    Assignee: Allied Telesyn, Inc.
    Inventor: Karen Hovakimyan
  • Apparatus and method for improving an output signal from a nonlinear device through dynamic signal pre-distortion based upon lagrange interpolation
    Publication number: 20040052313
    Abstract: An apparatus for pre-distorting a signal includes input nodes to receive an in-phase input signal and a quadrature input signal. Feedback nodes receive an in-phase feedback signal and a quadrature feedback signal. Output nodes transmit an in-phase pre-distorted signal and a quadrature pre-distorted signal. A Lagrange interpolation digital pre-distortion circuit is connected to the input nodes, the feedback nodes, and the output nodes. The Lagrange interpolation digital pre-distortion circuit is configured to perform a Lagrange interpolation on the in-phase input signal, the quadrature input signal, the in-phase feedback signal, and the quadrature feedback signal to produce the in-phase pre-distorted signal and the quadrature pre-distorted signal.
    Type: Application
    Filed: September 13, 2002
    Publication date: March 18, 2004
    Inventor: Karen Hovakimyan