Patents by Inventor Din Lee

Din Lee 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).

  • Packet collisions and impulsive noise detection
    Patent number: 8948039
    Abstract: A method includes determining a first Signal-to-Noise Ratio (SNR) average for a first symbol set of at least one or more first symbols in one or more packets. The method includes determining a second SNR average for a second symbol set of at least one or more second symbols in the one or more packets. The method also includes determining a first difference between the first SNR average and the second SNR average. In response to determining that the first difference exceeds an SNR threshold, the method includes determining that a first channel event has occurred in the one or more packets at least within the first symbol set and the second symbol set and in response to determining that the first channel event has occurred, determining is to remain at the first data rate or at a second data rate that is higher than the first data rate.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: February 3, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: John Chappel, Brian J. Langlais, Joubin Karimi, Richard D. Roze, Son Binh Cam, Din Lee, Ehab Tahir
  • PACKET COLLISIONS AND IMPULSIVE NOISE DETECTION
    Publication number: 20140160953
    Abstract: A method includes determining a first Signal-to-Noise Ratio (SNR) average for a first symbol set of at least one or more first symbols in one or more packets. The method includes determining a second SNR average for a second symbol set of at least one or more second symbols in the one or more packets. The method also includes determining a first difference between the first SNR average and the second SNR average. In response to determining that the first difference exceeds an SNR threshold, the method includes determining that a first channel event has occurred in the one or more packets at least within the first symbol set and the second symbol set and in response to determining that the first channel event has occurred, determining is to remain at the first data rate or at a second data rate that is higher than the first data rate.
    Type: Application
    Filed: December 11, 2012
    Publication date: June 12, 2014
    Applicant: QUALCOMM INCORPORATED
    Inventors: John CHAPPEL, Brian J. LANGLAIS, Joubin KARIMI, Richard D. ROZE, Son Binh CAM, Din LEE, Ehab TAHIR
  • Method and system for digital modulation for burst mode applications
    Publication number: 20030174784
    Abstract: A method and system for digital modulation, particularly in burst mode applications, using a root raised cosine filter operating at a rate of four-samples-per-symbol. The raised cosine pulse-shaped baseband signal is interpolated in order to achieve a sampling rate of 44.96 MHz at the digital up-converter. The two-stage interpolation provides an overall interpolation ratio of 20. The digital upconverter performs the frequency adjustments for channelization and Doppler correction.
    Type: Application
    Filed: December 26, 2002
    Publication date: September 18, 2003
    Inventors: Vajira N. S. Samarasooriya, Eric Johnson, Robert Wood, Din Lee