Patents by Inventor Tin Vo

Tin Vo 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 transceiver using heterodyne detection and a transmitted reference clock
    Patent number: 7620318
    Abstract: A heterodyne communication system uses coherent data modulation that is resistant to phase noise. In particular, a pilot tone and reference clock signal are transmitted along with the modulated data to form the basis of an electrical demodulation local oscillator at the receiver. The pilot tone and/or reference clock signal carry phase noise which is correlated with the phase noise in the data signal. At the receiver, the local oscillator is generated from the pilot tone and reference clock signal in a manner so that the local oscillator also has phase noise which is correlated with the phase noise in the data signal. Thus, the two noise components can be used to cancel each other during demodulation of the data signal using the local oscillator.
    Type: Grant
    Filed: January 14, 2008
    Date of Patent: November 17, 2009
    Inventors: Ji Li, Laurence J. Newell, Tin Vo, Ting K. Yee, Peter H. Chang, Robert K. McElheny
  • OPTICAL TRANSCEIVER USING HETERODYNE DETECTION AND A TRANSMITTED REFERENCE CLOCK
    Publication number: 20080145063
    Abstract: A heterodyne communication system uses coherent data modulation that is resistant to phase noise. In particular, a pilot tone and reference clock signal are transmitted along with the modulated data to form the basis of an electrical demodulation local oscillator at the receiver. The pilot tone and/or reference clock signal carry phase noise which is correlated with the phase noise in the data signal. At the receiver, the local oscillator is generated from the pilot tone and reference clock signal in a manner so that the local oscillator also has phase noise which is correlated with the phase noise in the data signal. Thus, the two noise components can be used to cancel each other during demodulation of the data signal using the local oscillator.
    Type: Application
    Filed: January 14, 2008
    Publication date: June 19, 2008
    Inventors: Ji Li, Laurence J. Newell, Tin Vo, Ting K. Yee, Peter H. Chang, Robert K. McElheny
  • Optical transceiver using heterodyne detection and a transmitted reference clock
    Patent number: 7346279
    Abstract: A heterodyne communication system uses coherent data modulation that is resistant to phase noise. In particular, a pilot tone and reference clock signal are transmitted along with the modulated data to form the basis of an electrical demodulation local oscillator at the receiver. The pilot tone and/or reference clock signal carry phase noise which is correlated with the phase noise in the data signal. At the receiver, the local oscillator is generated from the pilot tone and reference clock signal in a manner so that the local oscillator also has phase noise which is correlated with the phase noise in the data signal. Thus, the two noise components can be used to cancel each other during demodulation of the data signal using the local oscillator.
    Type: Grant
    Filed: March 25, 2002
    Date of Patent: March 18, 2008
    Assignee: Forster Energy LLC
    Inventors: Ji Li, Laurence J. Newell, Tin Vo, Ting K. Yee, Peter H. Chang, Robert K. McElheny