Method of determining sampling time points

  • US 5,228,057 A
  • Filed: 11/17/1992
  • Issued: 07/13/1993
  • Est. Priority Date: 11/15/1989
  • Status: Expired due to Term
First Claim
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1. A signal processing method comprising the steps of:

  • sampling an analog signal at recurrent signal sampling time points which are selected relative to a synchronization time point common to a transmitter and a receiver, such that a time interval for transmission of a symbol comprises a whole number of signal sampling time points;

    correlating known synchronization sequences with sampled values generated by said sampling step to generate correlation values;

    determining energy values related to said correlation values;

    down sampling said energy values at a desired number of the signal sampling points which are mutually spaced apart by the time interval;

    calculating at least one comparison value based on said down sampled energy values and corresponding to at least one sampling signal time point;

    selecting one of the at least one comparison values having a largest magnitude;

    selecting one of the signal sampling time points which correspond to the selected largest comparison value as a reference sampling time point for one of said known synchronization sequences; and

    using said reference sampling time point to further process said analog signal.

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