Patents by Inventor Shreyas Sen

Shreyas Sen 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: 8838017
    Abstract: Techniques for detecting jammer signals in a received signal are described. In one aspect, high-speed current mirror resistive compensation circuits and output impedance boosting circuits are utilized to increase amplifier bandwidth in an improved wideband amplifier circuit. In another aspect, a dual transistor configuration including common source topology, averaging capacitors and a comparator circuit is utilized to improve the sensing of signal peaks in a peak detector block, which can be used together with the wideband amplifier circuit and a digital jammer detection circuit to detect jammer signals. The digital jammer detection circuit aids in the determination of the presence of jammer signals within the received signal, the determination of which may be variable due to programmability of the digital jammer detection circuit as described.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: September 16, 2014
    Assignee: QUALCOMM Incorporated
    Inventors: Harish S. Muthali, Shreyas Sen
  • Patent number: 8526533
    Abstract: An exemplary embodiment of the present invention provides a method of measuring I-Q mismatch in a system having a transmitter. The transmitter comprises an in-phase up-converter, a quadrature-phase up-converter, and a power detector.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: September 3, 2013
    Assignee: Georgia Tech Research Corporation
    Inventors: Shreyas Sen, Shyam Kumar Devarakond, Abhijit Chatterjee
  • Patent number: 8358169
    Abstract: The presently invention is directed to ways to measure distortion effects while allowing for the possibility of significant reduction in test cost. An exemplary embodiment of the present invention provides a method for amplifier distortion measurement including comparing a first amplitude response of an output signal from a power amplifier to a second amplitude response of a reference input signal to determine a set of Amplitude-to-Amplitude (“AM-AM”) distortion values. Additionally, the method for amplifier distortion measurement includes equalizing the first amplitude response of the output signal to match the second amplitude response of the reference input signal based on the set of AM-AM distortion values and creating a difference signal based on a comparison of the equalized output signal to the reference input signal.
    Type: Grant
    Filed: November 1, 2010
    Date of Patent: January 22, 2013
    Assignee: Georgia Tech Research Corporation
    Inventors: Shreyas Sen, Shyam Kumar Devarakond, Abhijit Chatterjee
  • Publication number: 20120140807
    Abstract: An exemplary embodiment of the present invention provides a method of measuring I-Q mismatch in a system having a transmitter. The transmitter comprises an in-phase up-converter, a quadrature-phase up-converter, and a power detector.
    Type: Application
    Filed: May 24, 2011
    Publication date: June 7, 2012
    Applicant: Georgia Tech Research Corporation
    Inventors: Abhijit Chatterjee, Shreyas Sen, Shyam Kumar Devarakond
  • Publication number: 20120128041
    Abstract: The various embodiments of the present disclosure relate generally to power-conscious self-healing transceiver systems and methods. An embodiment of the present invention provides a method of power-consciously self-healing a transceiver system. The method comprises providing a transceiver device having a plurality of tuning elements configured to control a plurality of specifications of the device, determining initial values for the plurality of tuning elements, and performing a hardware-iterative gradient search to obtain values for each tuning element such that the plurality of specifications are within a tolerated range.
    Type: Application
    Filed: May 17, 2011
    Publication date: May 24, 2012
    Applicant: Georgia Tech Research Corporation
    Inventors: Abhijit Chatterjee, Shreyas Sen, Shyam Kumar Devarakond, Vishwanath Natarajan
  • Patent number: 8059571
    Abstract: Low-power wireless receivers and low-power communication methods and systems are provided. According to some embodiments, a low-power wireless receiver can comprise an input module, a controller, and a feedback loop. The input module can receive a wireless signal from a wireless communication channel. The controller can receive the wireless signal and provide a control signal corresponding to the wireless communication channel. The controller can be operatively configured to dynamically modify the control signal responsive to conditions of the wireless signal and/or the communication channel. The feedback loop can be disposed between the controller and the input module and can dynamically provide the control signal to the input module such that the input module can modify quality conditions of the wireless signal.
    Type: Grant
    Filed: March 1, 2008
    Date of Patent: November 15, 2011
    Assignee: Georgia Tech Research Corporation
    Inventors: Shreyas Sen, Abhijit Chaterjee, Rajarajan Senguttuvan
  • Publication number: 20110102080
    Abstract: The presently invention is directed to ways to measure distortion effects while allowing for the possibility of significant reduction in test cost. An exemplary embodiment of the present invention provides a method for amplifier distortion measurement including comparing a first amplitude response of an output signal from a power amplifier to a second amplitude response of a reference input signal to determine a set of Amplitude-to-Amplitude (“AM-AM”) distortion values. Additionally, the method for amplifier distortion measurement includes equalizing the first amplitude response of the output signal to match the second amplitude response of the reference input signal based on the set of AM-AM distortion values and creating a difference signal based on a comparison of the equalized output signal to the reference input signal.
    Type: Application
    Filed: November 1, 2010
    Publication date: May 5, 2011
    Applicant: Georgia Tech Research Corporation
    Inventors: Abhijit Chatterjee, Shreyas Sen, Shyam Kumar Devarakond
  • Publication number: 20100245151
    Abstract: Techniques for detecting jammer signals in a received signal are described. In one aspect, high-speed current mirror resistive compensation circuits and output impedance boosting circuits are utilized to increase amplifier bandwidth in an improved wideband amplifier circuit. In another aspect, a dual transistor configuration including common source topology, averaging capacitors and a comparator circuit is utilized to improve the sensing of signal peaks in a peak detector block, which can be used together with the wideband amplifier circuit and a digital jammer detection circuit to detect jammer signals. The digital jammer detection circuit aids in the determination of the presence of jammer signals within the received signal, the determination of which may be variable due to programmability of the digital jammer detection circuit as described.
    Type: Application
    Filed: October 20, 2009
    Publication date: September 30, 2010
    Applicant: QUALCOMM Incorporated
    Inventors: Harish S. Muthali, Shreyas Sen
  • Publication number: 20090219863
    Abstract: Low-power wireless receivers and low-power communication methods and systems are provided. According to some embodiments, a low-power wireless receiver can comprise an input module, a controller, and a feedback loop. The input module can receive a wireless signal from a wireless communication channel. The controller can receive the wireless signal and provide a control signal corresponding to the wireless communication channel. The controller can be operatively configured to dynamically modify the control signal responsive to conditions of the wireless signal and/or the communication channel. The feedback loop can be disposed between the controller and the input module and can dynamically provide the control signal to the input module such that the input module can modify quality conditions of the wireless signal.
    Type: Application
    Filed: March 1, 2008
    Publication date: September 3, 2009
    Applicant: Georgia Tech Research Corporation
    Inventors: Shreyas Sen, Abhijit Chaterjee, Rajarajan Senguttuvan