Patents by Inventor Christopher Philip Johnson

Christopher Philip Johnson 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).

  • Method for reverse channel sounding in a communications system
    Patent number: 6031831
    Abstract: A method is disclosed for determining current channel state information in a communications system having a first communications unit communicating to a second communications unit, wherein the first communications unit sends a channel sounding packet (32) to the second communications unit. The channel sounding packet (32) is sent a time period, t, prior to the transmission of a signal by the second communications unit to the first communications unit. The second communications unit receives the channel sounding packet (46) and processes the channel sounding packet to determine at least one channel characteristic. In response to receiving the channel sounding packet (46) the second communications unit appends frame code information (48) to the signal to be transmitted from the second communications unit to the first communications unit, to inform the first communications unit of the communications parameters that have been optimized.
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: February 29, 2000
    Assignee: Motorola, Inc.
    Inventors: Tiong Tan Boon, Andrew John Aftelak, Dragan Boscovic, Christopher Philip Johnson, Jonathan Alastair Gibbs, Antony John Wray