Patents by Inventor Shantanu Khare

Shantanu Khare 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).

  • Hardware simplification of sic-MIMO decoding by use of a single hardware element with channel and noise adaptation for interference cancelled streams
    Patent number: 8989320
    Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for simplified serial interference cancellation in multiple-input multiple-output (MIMO) and non-MIMO wireless systems by using a single hardware element for multiple interference cancelled streams.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: March 24, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Jia Tang, Jong Hyeon Park, Shantanu Khare
  • Unified iterative decoding architecture using joint LLR extraction and probability
    Patent number: 8976903
    Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for unified iterative demodulation-decoding that can be employed in both multiple-input multiple-output (MIMO) and non-MIMO wireless systems.
    Type: Grant
    Filed: September 2, 2009
    Date of Patent: March 10, 2015
    Assignee: QUALCOMM Incorporated
    Inventors: Parvathanathan Subrahmanya, Andrew Sendonaris, Jia Tang, Atul A. Salvekar, Shantanu Khare, Jong Hyeon Park, Brian C. Banister, Tao Cui
  • Method and apparatus for soft symbol determination
    Patent number: 8890722
    Abstract: A method for wireless communication is disclosed that includes selecting a plurality of probabilities for a symbol based on a bit-to-symbol mapping; calculating a conditional mean of the symbol based on the plurality of probabilities; and, generating a signal representative of the symbol based on the conditional mean of the symbol. An apparatus for performing the method is also disclosed.
    Type: Grant
    Filed: June 11, 2012
    Date of Patent: November 18, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Young Geun Cho, Jia Tang, Shantanu Khare, Ming-Chieh Kuo, Iwen Yao
  • Using joint decoding engine in a wireless device
    Patent number: 8634332
    Abstract: A method for using a joint decoding engine in a wireless device is disclosed. A first symbol stream and a second symbol stream in a received multiple input multiple output (MIMO) signal is determined. A scaled channel estimate for a wireless transmission channel and a scaled noise covariance of the MIMO signal are also determined. The scaled channel estimate and the first symbol stream are whitened. Max log maximum a posteriori (MLM) processing is performed on the whitened first symbol stream to produce a first data stream. The first data stream may be de-rate matched and decoded to produce a decoded first data stream.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: January 21, 2014
    Assignee: Qualcomm Incorporated
    Inventors: Jia Tang, Atul A. Salvekar, Jonathan Sidi, Jong Hyeon Park, Subramanya P. Rao, Abhinav Gupta, Shantanu Khare, Gokhan Mergen
  • Iterative decoding architecture with HARQ combining and soft decision directed channel estimation
    Patent number: 8514984
    Abstract: Certain aspects of the present disclosure relate to a method for iterative decoding with re-transmissions of data and to a method for iterative decoding with soft decision directed channel estimation.
    Type: Grant
    Filed: September 21, 2009
    Date of Patent: August 20, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jia Tang, Atul A. Salvekar, Parvathanathan Subrahmanya, Andrew Sendonaris, Shantanu Khare, Jong Hyeon Park, Brian C. Banister, Tao Cui
  • Exploiting known rate matching information in blind decoding of downlink wireless data transmissions
    Patent number: 8441981
    Abstract: In the processing of a data transmission received on wireless data channel HS-DSCH during HS-SCCH-less (HSL) operation according to 3GPP TS 25.214 V7.7.0, a situation is identified wherein redundancy version information corresponding to the received data transmission cannot be obtained from wireless control channel HS-SCCH. The redundancy version information is normally indicative of an HSL redundancy version that specifies derate matching for the received data transmission. In response to identification of the situation, derate matching is applied to the received data transmission according to an HSL redundancy version other than the HSL redundancy version that is specified by HSL for derate matching in the situation.
    Type: Grant
    Filed: February 14, 2008
    Date of Patent: May 14, 2013
    Assignee: QUALCOMM Incorporated
    Inventors: Jonathan Sidi, Shantanu Khare
  • METHOD AND APPARATUS FOR SOFT SYMBOL DETERMINATION
    Publication number: 20120249346
    Abstract: A method for wireless communication is disclosed that includes selecting a plurality of probabilities for a symbol based on a bit-to-symbol mapping; calculating a conditional mean of the symbol based on the plurality of probabilities; and, generating a signal representative of the symbol based on the conditional mean of the symbol. An apparatus for performing the method is also disclosed.
    Type: Application
    Filed: June 11, 2012
    Publication date: October 4, 2012
    Applicant: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Young Geun Cho, Jia Tang, Shantanu Khare, Ming-Chieh Kuo, Iwen Yao
  • Method and apparatus for soft symbol determination
    Patent number: 8199034
    Abstract: A method for wireless communication is disclosed that includes selecting a plurality of probabilities for a symbol based on a bit-to-symbol mapping; calculating a conditional mean of the symbol based on the plurality of probabilities; and, generating a signal representative of the symbol based on the conditional mean of the symbol. An apparatus for performing the method is also disclosed.
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: June 12, 2012
    Assignee: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Young Geun Cho, Jia Tang, Shantanu Khare, Ming-Chieh Kuo, Iwen Yao
  • USING JOINT DECODING ENGINE IN A WIRELESS DEVICE
    Publication number: 20110268019
    Abstract: A method for using a joint decoding engine in a wireless device is disclosed. A first symbol stream and a second symbol stream in a received multiple input multiple output (MIMO) signal is determined. A scaled channel estimate for a wireless transmission channel and a scaled noise covariance of the MIMO signal are also determined. The scaled channel estimate and the first symbol stream are whitened. Max log maximum a posteriori (MLM) processing is performed on the whitened first symbol stream to produce a first data stream. The first data stream may be de-rate matched and decoded to produce a decoded first data stream.
    Type: Application
    Filed: April 29, 2010
    Publication date: November 3, 2011
    Applicant: QUALCOMM INCORPORATED
    Inventors: Jia Tang, Atul A. Salvekar, Shantanu Khare, Gokhan Mergen, Jonathan Sidi, Jong Hyeon Park, Subramanya P. Rao, Abhinav Gupta
  • METHOD AND APPARATUS FOR SOFT SYMBOL DETERMINATION
    Publication number: 20110254714
    Abstract: A method for wireless communication is disclosed that includes selecting a plurality of probabilities for a symbol based on a bit-to-symbol mapping; calculating a conditional mean of the symbol based on the plurality of probabilities; and, generating a signal representative of the symbol based on the conditional mean of the symbol. An apparatus for performing the method is also disclosed.
    Type: Application
    Filed: April 20, 2010
    Publication date: October 20, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Young Geun Cho, Jia Tang, Shantanu Khare, Ming-Chieh Kuo, Iwen Yao
  • ITERATIVE DECODING ARCHITECTURE WITH HARQ COMBINING AND SOFT DECISION DIRECTED CHANNEL ESTIMATION
    Publication number: 20110051860
    Abstract: Certain aspects of the present disclosure relate to a method for iterative decoding with re-transmissions of data and to a method for iterative decoding with soft decision directed channel estimation.
    Type: Application
    Filed: September 21, 2009
    Publication date: March 3, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Jia Tang, Atul A. Salvekar, Parvathanathan Subrahmanya, Andrew Sendonaris, Shantanu Khare, Jong Hyeon Park, Brian C. Banister, Tao Cui
  • UNIFIED ITERATIVE DECODING ARCHITECTURE USING JOINT LLR EXTRACTION AND A PRIORI PROBABILITY
    Publication number: 20110051831
    Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for unified iterative demodulation-decoding that can be employed in both multiple-input multiple-output (MIMO) and non-MIMO wireless systems.
    Type: Application
    Filed: September 2, 2009
    Publication date: March 3, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Parvathanathan Subrahmanya, Andrew Sendonaris, Jia Tang, Atul A. Salvekar, Shantanu Khare, Jong Hyeon Park, Brian C. Banister, Tao Cui
  • HARDWARE SIMPLIFICATION OF SIC-MIMO DECODING BY USE OF A SINGLE HARDWARE ELEMENT WITH CHANNEL AND NOISE ADAPTATION FOR INTERFERENCE CANCELLED STREAMS
    Publication number: 20110051858
    Abstract: Certain aspects of the present disclosure relate to a method and an apparatus for simplified serial interference cancellation in multiple-input multiple-output (MIMO) and non-MIMO wireless systems by using a single hardware element for multiple interference cancelled streams.
    Type: Application
    Filed: September 2, 2009
    Publication date: March 3, 2011
    Applicant: QUALCOMM Incorporated
    Inventors: Atul A. Salvekar, Jia Tang, Jong Hyeon Park, Shantanu Khare
  • EXPLOITING KNOWN RATE MATCHING INFORMATION IN BLIND DECODING OF DOWNLINK WIRELESS DATA TRANSMISSIONS
    Publication number: 20090207781
    Abstract: In the processing of a data transmission received on wireless data channel HS-DSCH during HS-SCCH-less (HSL) operation according to 3GPP TS 25.214 V7.7.0, a situation is identified wherein redundancy version information corresponding to the received data transmission cannot be obtained from wireless control channel HS-SCCH. The redundancy version information is normally indicative of an HSL redundancy version that specifies derate matching for the received data transmission. In response to identification of the situation, derate matching is applied to the received data transmission according to an HSL redundancy version other than the HSL redundancy version that is specified by HSL for derate matching in the situation.
    Type: Application
    Filed: February 14, 2008
    Publication date: August 20, 2009
    Applicant: QUALCOMM Incorporated
    Inventors: Jonathan Sidi, Shantanu Khare