Patents by Inventor Jim J. Chao

Jim J. Chao 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).

  • Method and system to reduce harmonic interference of broadband wireless devices to GPS receiver
    Patent number: 8929925
    Abstract: A technique for reducing interference in a GPS-equipped wireless device having a transmitter is provided. In doing so, a GPS signal is acquired, and it is determined whether the GPS signal contains valid GPS data, the GPS signal having a GPS frequency range. If the GPS data is not valid due to the noted second harmonic interference, the transmit power levels of the transmitter within different categories of frequency blocks (frequency blocks corresponding to the second harmonic of the transmit frequency of the device interfering with the GPS frequency range entirely, partially and only slightly) are selectively and iteratively determined. The power levels in these frequency blocks are iteratively and selectively reduced to help determine valid GPS data.
    Type: Grant
    Filed: March 14, 2013
    Date of Patent: January 6, 2015
    Assignee: Alcatel Lucent
    Inventors: Jim J. Chao, Subramanian Vasudevan
  • METHOD AND SYSTEM TO REDUCE HARMONIC INTERFERENCE OF BROADBAND WIRELESS DEVICES TO GPS RECEIVER
    Publication number: 20140274162
    Abstract: A technique for reducing interference in a GPS-equipped wireless device having a transmitter is provided. In doing so, a GPS signal is acquired, and it is determined whether the GPS signal contains valid GPS data, the GPS signal having a GPS frequency range. If the GPS data is not valid due to the noted second harmonic interference, the transmit power levels of the transmitter within different categories of frequency blocks (frequency blocks corresponding to the second harmonic of the transmit frequency of the device interfering with the GPS frequency range entirely, partially and only slightly) are selectively and iteratively determined. The power levels in these frequency blocks are iteratively and selectively reduced to help determine valid GPS data.
    Type: Application
    Filed: March 14, 2013
    Publication date: September 18, 2014
    Applicant: Alcatel-Lucent USA Inc.
    Inventors: Jim J. Chao, Subramanian Vasudevan