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Method and apparatus for estimating parameters of a communication system using antenna arrays and spatial processing

  • US 5,930,243 A
  • Filed: 10/11/1996
  • Issued: 07/27/1999
  • Est. Priority Date: 10/11/1996
  • Status: Expired due to Term
First Claim
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1. In a communication system comprising at least one remote terminal and a base station, the base station having an antenna array of m antenna elements, the communication system having a set of one or more parameters, said set consisting of a first set of parameters already estimated and a second set of parameters to be estimated, a method for determining an estimate of one or more parameters of the second set, the method comprising:

  • a) transmitting a first signal of known characteristics;

    b) receiving said first signal at the base station as a first plurality of m received signals at m corresponding antenna elements;

    c) determining a cost function that is related to the at least one or more parameters of the second set, said determining including;

    i) forming a copy signal from samples of the signals of the first plurality of received signals using a weight vector,ii) if the first set is not empty, obtaining estimates of one or more parameters of the first set, andiii) using the known characteristics of the first signal; and

    d) selecting as the estimate of the one or more parameters of the second set, the values of the one or more parameters of the second set that minimize the cost function.

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