Patents by Inventor Kanna Krishnan

Kanna Krishnan 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).

  • Publication number: 20120126804
    Abstract: An apparatus for detecting a faulty concentric neutral wire in a live power distribution cable may include, in one embodiment, a housing for sliding along a surface of a power distribution cable, a magnetic sensor, and a motion device. The magnetic sensor may be coupled to the housing and configured to detect a magnetic field produced by each concentric neutral wire as the housing moves along the surface of the cable. The motion device may also be coupled to the housing, and may detect motion of the housing relative to the cable. In some embodiments, a communication device may communicate data describing the magnetic field and motion to a destination device.
    Type: Application
    Filed: May 23, 2011
    Publication date: May 24, 2012
    Applicant: University of California
    Inventors: Richard M. White, Igor Paprotny, Michael Seidel, Kanna Krishnan, Eli S. Leland
  • Patent number: 7072462
    Abstract: A system for determining whether a telephone loop is capable of carrying a Digital Subscriber Line (DSL) signal. A Constant Amplitude Zero Auto Correlation (CAZAC) sequence signal is generated and transmitted through the loop plant to a central office and the received echo signal is processed using second-order statistics. The second-order statistics calculation permits determination of the echo signal amplitude and time between the echo signal and sequence signal. The echo signal amplitude and time may be used to obtain telephone loop characteristics such as loop length.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: July 4, 2006
    Assignee: Intel Corporation
    Inventors: Wesley H. Smith, Veda Krishnan, Xiao M. Gao, Kanna Krishnan
  • Patent number: 7020246
    Abstract: An apparatus and technique for determining whether a telephone loop is capable of carrying a Digital Subscriber Line (DSL) signal. Time domain reflected (TDR) signals that are echoes of transmit impulse signals are processed using time domain echo averaging and echo enhancement using second-order statistics. Each technique allows clearer visualization of the TDR echo signal by reducing the noise and distortion present in the TDR signals. These statistical signal processing techniques allow determination of telephone loop characteristics such as loop length once the TDR echo signal amplitude and time index are calculated.
    Type: Grant
    Filed: June 30, 2003
    Date of Patent: March 28, 2006
    Assignee: Intel Corporation
    Inventors: Xiao M. Gao, Wesley H. Smith, Veda Krishnan, Kanna Krishnan
  • Publication number: 20040264685
    Abstract: A system for determining whether a telephone loop is capable of carrying a Digital Subscriber Line (DSL) signal. A Constant Amplitude Zero Auto Correlation (CAZAC) sequence signal is generated and transmitted through the loop plant to a central office and the received echo signal is processed using second-order statistics. The second-order statistics calculation permits determination of the echo signal amplitude and time between the echo signal and sequence signal. The echo signal amplitude and time may be used to obtain telephone loop characteristics such as loop length.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventors: Wesley H. Smith, Veda Krishnan, Xiao M. Gao, Kanna Krishnan
  • Publication number: 20040267678
    Abstract: An apparatus and technique for Digital Subscriber Line (DSL) telephone loop qualification that includes a fuzzy logic impedance mismatch network. The impedance mismatch network is used to increase the received echo of a transmit pulse signal to determine the telephone loop characteristics.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventors: Xiao M. Gao, Wesley H. Smith, Veda Krishnan, Kanna Krishnan
  • Publication number: 20040264684
    Abstract: An apparatus and technique for determining whether a telephone loop is capable of carrying a Digital Subscriber Line (DSL) signal. Time domain reflected (TDR) signals that are echoes of transmit impulse signals are processed using time domain echo averaging and echo enhancement using second-order statistics. Each technique allows clearer visualization of the TDR echo signal by reducing the noise and distortion present in the TDR signals. These statistical signal processing techniques allow determination of telephone loop characteristics such as loop length once the TDR echo signal amplitude and time index are calculated.
    Type: Application
    Filed: June 30, 2003
    Publication date: December 30, 2004
    Inventors: Xiao M. Gao, Wesley H. Smith, Veda Krishnan, Kanna Krishnan