Patents by Inventor Kunwar Devesh

Kunwar Devesh 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).

  • Patent number: 7298806
    Abstract: The disclosed invention provides a system, a method and a computer program product for timing offset estimation for frequency selective fading channels in wireless communication systems. The disclosed invention first obtains a corrected received signal using the received signal and a pre-estimated timing offset. The pre-estimated timing offset is further tracked in two steps. In the first step a plurality of probable deviations in the pre-estimated timing offset are considered. Then a training sequence is used to determine an expected signal corresponding to each of the probable deviations. The corrected received signal is then shifted through the probable deviations. Thereafter error factor between the expected signals and corresponding shifted received signals is obtained. The probable deviation yielding optimum error factor is then identified as the first estimate of the deviation in timing offset.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: November 20, 2007
    Assignee: Hellosoft Inc.
    Inventors: Gottimukkala Narendra Varma, Kunwar Devesh, Yeleswarapu Yoganandam
  • Publication number: 20050250466
    Abstract: A method and an apparatus for improving the equalization performance of a wireless receiver in the presence of co-channel interference by selectively filtering a received signal are disclosed. In the presence of co-channel interference, the noise in the received signal comprises a white noise component and a non-white noise component. Improvement in equalization is achieved by whitening the non-white noise component by selectively filtering the received signal. The selective filtering is governed by the dominant component of the noise in the received signal. The disclosed invention is suitable for use in Global System for Mobile Communications (GSM) wireless receivers using Gaussian Minimum Shift Keying (GMSK) signaling. The non-white noise component in the received signal, caused predominantly by co-channel interference, is whitened before feeding the received signal to Maximum Likelihood Sequence Estimator (MLSE), thereby improving the performance of MLSE.
    Type: Application
    Filed: April 26, 2004
    Publication date: November 10, 2005
    Applicant: HELLOSOFT INC.
    Inventors: Gottimukkala Varma, Kunwar Devesh, Chitrala Srinivasulu