Patents by Inventor Avinash Vasudev Sakleshpur

Avinash Vasudev Sakleshpur 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).

  • Wideband IQ mismatch correction for direct down-conversion receiver
    Patent number: 9647867
    Abstract: A direct down-conversion (DDC) front end receiver includes first Q-channel that filters a sum of PRBS and baseband quadrature signals to generate a first filtered quadrature signal, a second Q-channel that filters a difference of the baseband and PRBS signals to generate a second filtered quadrature signal, a first I-channel and a second I-channel, Q-path and I-path PRBS cancellation blocks for cancelling corresponding PRBS components from sum of first and second filtered quadrature signals and sum of first and second filtered inphase signals respectively, Q-path and I-path sum filter estimation blocks for estimating quadrature and inphase sum filter responses. An IQ mismatch compensation filter estimate and tracking block estimates IQ mismatch compensation filter response from estimated quadrature and inphase sum filter responses, and an IQ mismatch compensation filter filters the modified inphase signal with the IQ mismatch compensation filter response, to generate a filter compensated inphase signal.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: May 9, 2017
    Assignee: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Karthik Khanna Subramani, Nagarajan Viswanathan, Avinash Vasudev Sakleshpur, Jaiganesh Balakrishnan
  • WIDEBAND IQ MISMATCH CORRECTION FOR DIRECT DOWN-CONVERSION RECEIVER
    Publication number: 20160373288
    Abstract: A direct down-conversion (DDC) front end receiver includes first Q-channel that filters a sum of PRBS and baseband quadrature signals to generate a first filtered quadrature signal, a second Q-channel that filters a difference of the baseband and PRBS signals to generate a second filtered quadrature signal, a first I-channel and a second I-channel, Q-path and I-path PRBS cancellation blocks for cancelling corresponding PRBS components from sum of first and second filtered quadrature signals and sum of first and second filtered inphase signals respectively, Q-path and I-path sum filter estimation blocks for estimating quadrature and inphase sum filter responses. An IQ mismatch compensation filter estimate and tracking block estimates IQ mismatch compensation filter response from estimated quadrature and inphase sum filter responses, and an IQ mismatch compensation filter filters the modified inphase signal with the IQ mismatch compensation filter response, to generate a filter compensated inphase signal.
    Type: Application
    Filed: December 8, 2015
    Publication date: December 22, 2016
    Inventors: KARTHIK KHANNA SUBRAMANI, Nagarajan Viswanathan, Avinash Vasudev Sakleshpur, Jaiganesh Balakrishnan