Patents by Inventor Allan J. Hammell

Allan J. Hammell 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).

  • Fine synchronization of a signal in the presence of time shift caused by doppler estimation error
    Patent number: 7764751
    Abstract: A radio frequency receiver includes a receiving circuit for receiving and decoding an incoming radio frequency signal including a correlation signal. The receiver also includes a timing estimation circuit. The timing estimation circuit comprises a signal buffer receiving a plurality of correlation signal segments, and a first peak detection and Doppler estimation circuit for determining a first timing of a first segment and the associated first Doppler shift. The timing estimation circuit also comprises a memory coupled to the signal buffer, the memory receiving a plurality of segment correlation metrics, and a second peak detection and Doppler estimation circuit for determining a second timing of a second segment and the associated second Doppler shift.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: July 27, 2010
    Assignee: Rockwell Collins, Inc.
    Inventors: Allan J. Hammell, Carlos J. Chavez