Patents Assigned to Freescale Semiconducter, Inc.
  • Patent number: 7003056
    Abstract: A system and method in a communication device (10) uses timing tracking to correct timing drifting due to the difference in frequency of a transmitter clock and a receiver clock. With the timing tracking, correlation values of three consecutive samples are calculated using the receive signal and the recovered symbols and then summed. A timing signal, (nk, frack) is updated based upon a metric calculated from a previous correlation value, R?1, present correlation value (R0) and a next con-elation value (R+1). Adjustment of timing signal is based on the relative location with respect to the current timing of a peak of a second order polynomial curve formed by the first correlation value R?1, the second correlation value R0 and the third correlation value R+1.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: February 21, 2006
    Assignee: Freescale Semiconducter, Inc.
    Inventor: Weizhong Chen