Patents by Inventor Steven O. Hadfield

Steven O. Hadfield 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).

  • Encoder for low-density parity check codes
    Patent number: 8095859
    Abstract: Encoding of a low-density parity check code uses a block-circulant encoding matrix built from circulant matrices. Encoding can include partitioning data into a plurality of data segments. The data segments are each circularly rotated. A plurality of XOR summations are formed for each rotation of the data segments to produce output symbols. The XOR summations use data from the data segments defined by the circulant matrices. Output symbols are produced in parallel for each rotation of the data segments.
    Type: Grant
    Filed: January 9, 2008
    Date of Patent: January 10, 2012
    Assignee: L-3 Communications, Corp.
    Inventors: Justin C. Peterson, Steven O. Hadfield, Ryan Hinton