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Time dispersion measurement in radio communications systems

  • US 6,084,862 A
  • Filed: 09/26/1997
  • Issued: 07/04/2000
  • Est. Priority Date: 09/26/1997
  • Status: Expired due to Term
First Claim
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1. A method of measuring time dispersion in a signal that has been received from a channel, the method comprising the steps of:

  • generating a set of received samples from the received signal, wherein the set of received samples corresponds to a known training sequence;

    using the known training sequence and the corresponding set of received samples to generate one or more channel estimates;

    for each of the one or more channel estimates, determining a corresponding residual energy metric from the corresponding channel estimate, the known training sequence and the corresponding set of received samples;

    using the one or more residual energy metrics to estimate received useful energy, C, and reflection energy, R, in the received signal; and

    comparing the estimated received useful energy and the estimated reflection energy to determine a measure of time dispersion in the signal that has been received from the channel.

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