Patents by Inventor Purnima Naganathan

Purnima Naganathan 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: 7509556
    Abstract: An apparatus, system and method in which a plurality of interleavers are utilized with the outputs of the interleavers being combined to generate a single combined output are provided. In a preferred embodiment, at least two of the plurality of interleavers are of a different type. For example, in one exemplary embodiment, a first interleaver is an S-random interleaver with a second interleaver being one of an algebraic, convolutional, helical, pseudo random, or other type of interleaver. Combinational logic receives the output from each of the plurality of interleavers and combines the outputs to generate one combined output having a permuted order. By combining the outputs from a plurality of interleavers, a greater amount of randomness in the input data may be obtained as opposed to that of the known single interleaver systems.
    Type: Grant
    Filed: November 20, 2003
    Date of Patent: March 24, 2009
    Assignee: Seagate Technology LLC
    Inventors: Purnima Naganathan, Thomas V. Souvignier
  • Publication number: 20050283507
    Abstract: A sequence generator is configured to be re-initialized to a value selected derived from a candidate group that is derived from a predetermined value. If and when the re-initializing is performed, it is fully performed within about one clock cycle of setting the sequence generator to the predetermined value. The sequence generator is optionally initialized by a local processor to which it is operatively coupled, after which the processor receives one sequence value each cycle.
    Type: Application
    Filed: June 18, 2004
    Publication date: December 22, 2005
    Inventors: Thomas Souvignier, Purnima Naganathan, Gregory Silvus, Nan-Hsiung Yeh
  • Publication number: 20050149808
    Abstract: An apparatus, system and method in which a plurality of interleavers are utilized with the outputs of the interleavers being combined to generate a single combined output are provided. In a preferred embodiment, at least two of the plurality of interleavers are of a different type. For example, in one exemplary embodiment, a first interleaver is an S-random interleaver with a second interleaver being one of an algebraic, convolutional, helical, pseudo random, or other type of interleaver. Combinational logic receives the output from each of the plurality of interleavers and combines the outputs to generate one combined output having a permuted order. By combining the outputs from a plurality of interleavers, a greater amount of randomness in the input data may be obtained as opposed to that of the known single interleaver systems.
    Type: Application
    Filed: November 20, 2003
    Publication date: July 7, 2005
    Inventors: Purnima Naganathan, Thomas Souvignier