Patents by Inventor Rohit Negi

Rohit Negi 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: 8107570
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+?j), i=0?N?1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj (i+?j), i=N?2N?1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (?j1), a second estimate signal (?j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: September 23, 2009
    Date of Patent: January 31, 2012
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Publication number: 20100014619
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+?j), i=0?N?1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj (i+?j), i=N?2N?1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (?j1), a second estimate signal (?j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: September 23, 2009
    Publication date: January 21, 2010
    Applicant: TEXAS INSTRUMENTS INCORPORATED
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 7613259
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+?j), i=0?N?1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+?j), i=N?2N?1) during a second time (T1T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (?j1), a second estimate signal (?j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: November 3, 2009
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 7424077
    Abstract: A channel detector has an anchor points inserter, a desired signal calculator, a distance calculator and a data detector. The anchor points inserter is adapted to choose values of expected transition locations for transition shifts within a received signal and to insert anchor points corresponding to the chosen values within a bit detection interval. The desired signal calculator is coupled to the anchor points inserter and is adapted to estimate desired signals corresponding to transition location information from the anchor points inserter. The distance calculator is coupled to the desired signal calculator and is adapted to generate a distance calculator output based on distances between the received signal and each of the desired signals. The data detector is coupled to the distance calculator and is adapted to identify a bit sequence corresponding to a desired signal having a minimum distance from the received signal.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: September 9, 2008
    Assignee: Carnegie Mellon University
    Inventors: Xueshi Yang, Erozan Mehmet Kurtas, Rohit Negi, Xun Zhang
  • Patent number: 7366266
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+?j), i=0?N?1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+?j), i=N?2N?1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (?j1), a second estimate signal (?j2) and the first and second input signals. The correction circuit produces a first symbol estimate ( S1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: April 29, 2008
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 7200182
    Abstract: A circuit comprising a channel encoder circuit coupled to receive an input data sequence and produce an output data sequence. An interleaver circuit coupled to receive the output data sequence and produce an interleaved data sequence. An encoder circuit coupled to receive the interleaved sequence and produce a first encoded symbol at a first output terminal at a first time and produce a first transform of a second encoded symbol at a second output terminal at the first time and produce the second encoded symbol at the first output terminal at a second time and produce a second transform of the first encoded symbol at the second output terminal at the second time.
    Type: Grant
    Filed: July 25, 2002
    Date of Patent: April 3, 2007
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Publication number: 20060233287
    Abstract: A channel detector has an anchor points inserter, a desired signal calculator, a distance calculator and a data detector. The anchor points inserter is adapted to choose values of expected transition locations for transition shifts within a received signal and to insert anchor points corresponding to the chosen values within a bit detection interval. The desired signal calculator is coupled to the anchor points inserter and is adapted to estimate desired signals corresponding to transition location information from the anchor points inserter. The distance calculator is coupled to the desired signal calculator and is adapted to generate a distance calculator output based on distances between the received signal and each of the desired signals. The data detector is coupled to the distance calculator and is adapted to identify a bit sequence corresponding to a desired signal having a minimum distance from the received signal.
    Type: Application
    Filed: April 13, 2005
    Publication date: October 19, 2006
    Applicant: Seagate Technology LLC
    Inventors: Xueshi Yang, Erozan Kurtas, Rohit Negi, Xun Zhang
  • Publication number: 20050111597
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+?j), i=0?N?1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+?j), i=N?2N?1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (?j1), a second estimate signal (?j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({overscore (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: September 11, 2003
    Publication date: May 26, 2005
    Inventors: Anand Dabak, Rohit Negi
  • Publication number: 20040086065
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: June 23, 2003
    Publication date: May 6, 2004
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 6643338
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: December 3, 1998
    Date of Patent: November 4, 2003
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Publication number: 20020191704
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0−T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1−T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({overscore (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: July 25, 2002
    Publication date: December 19, 2002
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 6449314
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({tilde over (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: September 10, 2002
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Patent number: 6424679
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate (S1) in response to the first and second estimate signals and the first and second input signals.
    Type: Grant
    Filed: August 28, 2001
    Date of Patent: July 23, 2002
    Assignee: Texas Instruments Incorporated
    Inventors: Anand G. Dabak, Rohit Negi
  • Publication number: 20020090038
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rj1) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;j1), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({overscore (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: August 28, 2001
    Publication date: July 11, 2002
    Inventors: Anand G. Dabak, Rohit Negi
  • Publication number: 20020080894
    Abstract: A mobile communication system is designed with an input circuit coupled to receive a first plurality of signals (rj(i+&tgr;j), i=0−N−1) during a first time (T0-T1) from an external source and coupled to receive a second plurality of signals (rj(i+&tgr;j), i=N−2N−1) during a second time (T1-T2) from the external source. The input circuit receives each of the first and second plurality of signals along respective first and second paths (j). The input circuit produces a first input signal (Rjl) and a second input signal (Rj2) from the respective first and second plurality of signals. A correction circuit is coupled to receive a first estimate signal (&agr;jl), a second estimate signal (&agr;j2) and the first and second input signals. The correction circuit produces a first symbol estimate ({overscore (S)}1) in response to the first and second estimate signals and the first and second input signals.
    Type: Application
    Filed: August 28, 2001
    Publication date: June 27, 2002
    Inventors: Anand G. Dabak, Rohit Negi