Patents by Inventor Arunhaba Ghosh

Arunhaba Ghosh 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).

  • Interference cancellation and receive diversity for single-valued modulation receivers
    Patent number: 7949304
    Abstract: A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e.g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: May 24, 2011
    Assignees: AT&T Mobility II LLC, AT&T Intellectual Property I, L.P.
    Inventors: Ayman Mostafa, Richard A. Kobylinski, Arunhaba Ghosh
  • INTERFERENCE CANCELLATION AND RECEIVE DIVERSITY FOR SINGLE-VALUED MODULATION RECEIVERS
    Publication number: 20090058728
    Abstract: A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e.g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.
    Type: Application
    Filed: November 10, 2008
    Publication date: March 5, 2009
    Inventors: Ayman Mostafa, Richard A. Kobylinski, Arunhaba Ghosh
  • Interference cancellation and receive diversity for single-valued modulation receivers
    Patent number: 7450924
    Abstract: A combined SAIC receiver and a multiple-antenna, receive diversity receiver are employed to reduce interference in a wireless system. The real and imaginary parts of the de-rotated signal for each receive path associated with an antenna are separately filtered and a combined output signal of all receive paths is generated. The weighting coefficients are adjusted based on an error signal produced by comparing the combined output signal with a reference signal. The weighting coefficients are initially set based on an MMSE/LS type of signal processing criteria, where the reference signal is the Training Sequence Code (TSC). Subsequent adjustment/tracking can be accomplished by using known tracking algorithms, e.g. LMS or RLS, or the coefficients can be re-computed using MMSE/LS processing. The reference signal for tracking may be a combination of the TSC and estimated data symbols provided by an equalizer.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: November 11, 2008
    Assignees: AT&T Mobility II LLC, SBC Knowledge Ventures, L.P.
    Inventors: Ayman Mostafa, Richard A. Kobylinski, Arunhaba Ghosh