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Likelihood-based geolocation prediction algorithms for CDMA systems using pilot strength measurements

  • US 6,889,053 B1
  • Filed: 07/26/1999
  • Issued: 05/03/2005
  • Est. Priority Date: 07/26/1999
  • Status: Expired due to Term
First Claim
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1. A method of predicting the location of a CDMA mobile communications unit in a wireless communications service area, comprising the steps of:

  • (a) receiving measure attribute information from a mobile unit location in the service area, said attribute information being specific to the location of the mobile unit in the service area;

    (b) computing the probability of the mobile unit being at a specific location in the service area in response to said received attribute information using a likelihood probability function, said likelihood probability function having an iterative procedure for generating a maximum likelihood estimator of the mobile unit'"'"'s location in this service area, wherein said likelihood probability function includes a frequentist likelihood function;

    (c) generating an output indicative of the likelihood of the mobile unit being at said location in the service area.

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