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Mobile speed estimation for digital cellular radio systems

  • US 6,370,357 B1
  • Filed: 12/21/1998
  • Issued: 04/09/2002
  • Est. Priority Date: 12/21/1998
  • Status: Expired due to Term
First Claim
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1. A method for estimating a speed of a mobile communication apparatus in a digital mobile communication network comprising:

  • receiving samples of a signal from said mobile communication apparatus, said samples arranged in time slots;

    deriving a power signal from said samples; and

    estimating an offset autocorrelation value of said power signal by correlating said power signal with a version of itself offset in time, said offset autocorrelation value representative of said speed of said mobile communication apparatus, said estimating said offset autocorrelation value including;

    for each of a plurality of time slots, estimating a single time slot offset autocorrelation value by correlating said power signal with a version of said power signal displaced by a predetermined number of time slots; and

    summing each said single time slot offset autocorrelation value to estimate said offset autocorrelation value.

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