Patents Represented by Attorney H. Frederick Haman

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  • GPS signal processing with 5-level carrier injection demodulation function using dual 3-level single sideband mixers
    Patent number: 5202693
    Abstract: An improved GPS receiver including a 5-level carrier injection function for digitally demodulating down-converted GPS signals, which utilizes dual 3-level single sideband mixers where one of the single sideband mixers is delayed by a predetermined interval, thereby allowing for the combination of the two 3-level single sideband mixers to be combined to provide an overall output signal which is representative of an output of a demodulator using a 5-level carrier injection signal.
    Type: Grant
    Filed: March 25, 1992
    Date of Patent: April 13, 1993
    Assignee: Rockwell International Corporation
    Inventor: Wai-Cheung Lee