Patents by Inventor Dennis Hul

Dennis Hul 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).

  • Delay-doppler channel response demodulation method and apparatus
    Patent number: 7970081
    Abstract: A wireless communication device uses a time-invariant delay-Doppler channel response estimate for received signal demodulation. The device provides coherent signal demodulation by accounting for frequency and time selectivity in a land-based mobile communication environment, which arise mainly because of delay and Doppler shifts, respectively. In one embodiment, the wireless communication device includes a channel estimator that estimates channel response in a wireless communication network by estimating a delay-Doppler response of a wireless communication channel to obtain a delay-Doppler channel response estimate and converting the delay-Doppler channel response estimate to a time-varying channel response estimate, e.g., a time-varying frequency or impulse response. The delay-Doppler response may be estimated in a continuous or discrete domain.
    Type: Grant
    Filed: May 11, 2006
    Date of Patent: June 28, 2011
    Assignee: Telefonaktiebolaget LM Ericsson (publ)
    Inventors: Jiann-Ching Guey, Abdulrauf Hafeez, Dennis Hul
  • Delay-doppler channel response demodulation method and apparatus
    Publication number: 20070263752
    Abstract: A wireless communication device uses a time-invariant delay-Doppler channel response estimate for received signal demodulation. The device provides coherent signal demodulation by accounting for frequency and time selectivity in a land-based mobile communication environment, which arise mainly because of delay and Doppler shifts, respectively. In one embodiment, the wireless communication device includes a channel estimator that estimates channel response in a wireless communication network by estimating a delay-Doppler response of a wireless communication channel to obtain a delay-Doppler channel response estimate and converting the delay-Doppler channel response estimate to a time-varying channel response estimate, e.g., a time-varying frequency or impulse response. The delay-Doppler response may be estimated in a continuous or discrete domain.
    Type: Application
    Filed: May 11, 2006
    Publication date: November 15, 2007
    Inventors: Jiann-Ching Guey, Abdulrauf Hafeez, Dennis Hul