Patents by Inventor CHRISTOPHER JOHN STAFFORD

CHRISTOPHER JOHN STAFFORD 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).

  • Wireless electronic device with a decoder and associated methods
    Patent number: 8923412
    Abstract: A method for operating a decoder includes receiving a complex signal representative of a received symbol from among a plurality of symbols. The received symbol includes a plurality of bits and corresponds to a respective point on a constellation map. Likelihood metrics are generated for the received symbol, with each likelihood metric reflecting a likelihood of the received symbol corresponding to one of the points on the constellation map. The likelihood metrics are arranged in columns and rows. Common likelihood metrics are determined for each column and for each row. The common likelihood metrics are compared to determine a best likelihood metric for the bits in the received symbol that are to be compared by columns, and to be compared by rows.
    Type: Grant
    Filed: December 13, 2012
    Date of Patent: December 30, 2014
    Assignee: BlackBerry Limited
    Inventor: Christopher John Stafford
  • WIRELESS ELECTRONIC DEVICE WITH A DECODER AND ASSOCIATED METHODS
    Publication number: 20140169506
    Abstract: A method for operating a decoder includes receiving a complex signal representative of a received symbol from among a plurality of symbols. The received symbol includes a plurality of bits and corresponds to a respective point on a constellation map. Likelihood metrics are generated for the received symbol, with each likelihood metric reflecting a likelihood of the received symbol corresponding to one of the points on the constellation map. The likelihood metrics are arranged in columns and rows. Common likelihood metrics are determined for each column and for each row. The common likelihood metrics are compared to determine a best likelihood metric for the bits in the received symbol that are to be compared by columns, and to be compared by rows.
    Type: Application
    Filed: December 13, 2012
    Publication date: June 19, 2014
    Applicant: Research In Motion Limited
    Inventor: CHRISTOPHER JOHN STAFFORD