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).
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Patent number: 8107570Abstract: 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: GrantFiled: September 23, 2009Date of Patent: January 31, 2012Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Publication number: 20100014619Abstract: 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: ApplicationFiled: September 23, 2009Publication date: January 21, 2010Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Anand G. Dabak, Rohit Negi
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Patent number: 7613259Abstract: 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: GrantFiled: June 23, 2003Date of Patent: November 3, 2009Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Patent number: 7424077Abstract: 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: GrantFiled: April 13, 2005Date of Patent: September 9, 2008Assignee: Carnegie Mellon UniversityInventors: Xueshi Yang, Erozan Mehmet Kurtas, Rohit Negi, Xun Zhang
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Patent number: 7366266Abstract: 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: GrantFiled: September 11, 2003Date of Patent: April 29, 2008Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Patent number: 7200182Abstract: 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: GrantFiled: July 25, 2002Date of Patent: April 3, 2007Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Publication number: 20060233287Abstract: 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: ApplicationFiled: April 13, 2005Publication date: October 19, 2006Applicant: Seagate Technology LLCInventors: Xueshi Yang, Erozan Kurtas, Rohit Negi, Xun Zhang
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Publication number: 20050111597Abstract: 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: ApplicationFiled: September 11, 2003Publication date: May 26, 2005Inventors: Anand Dabak, Rohit Negi
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Publication number: 20040086065Abstract: 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: ApplicationFiled: June 23, 2003Publication date: May 6, 2004Inventors: Anand G. Dabak, Rohit Negi
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Patent number: 6643338Abstract: 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: GrantFiled: December 3, 1998Date of Patent: November 4, 2003Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Publication number: 20020191704Abstract: 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: ApplicationFiled: July 25, 2002Publication date: December 19, 2002Inventors: Anand G. Dabak, Rohit Negi
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Patent number: 6449314Abstract: 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: GrantFiled: August 28, 2001Date of Patent: September 10, 2002Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Patent number: 6424679Abstract: 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: GrantFiled: August 28, 2001Date of Patent: July 23, 2002Assignee: Texas Instruments IncorporatedInventors: Anand G. Dabak, Rohit Negi
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Publication number: 20020090038Abstract: 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: ApplicationFiled: August 28, 2001Publication date: July 11, 2002Inventors: Anand G. Dabak, Rohit Negi
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Publication number: 20020080894Abstract: 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: ApplicationFiled: August 28, 2001Publication date: June 27, 2002Inventors: Anand G. Dabak, Rohit Negi