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<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
<MAN>
  <LANGUAGE>eng</LANGUAGE>
  <TITLE>lindquist</TITLE>
  <TYPE>Scilab Function</TYPE>
  <DATE>April 1993</DATE>
  <SHORT_DESCRIPTION name="lindquist"> Lindquist's algorithm</SHORT_DESCRIPTION>
  <CALLING_SEQUENCE>
    <CALLING_SEQUENCE_ITEM>[P,R,T]=lindquist(n,H,F,G,R0)  </CALLING_SEQUENCE_ITEM>
  </CALLING_SEQUENCE>
  <PARAM>
    <PARAM_INDENT>
      <PARAM_ITEM>
        <PARAM_NAME>n</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: number of iterations.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>H, F, G</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: estimated triple from the covariance sequence of <VERB>y</VERB>.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>R0</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: E(yk*yk')</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>P</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: solution of the Riccati equation after n iterations.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
      <PARAM_ITEM>
        <PARAM_NAME>R, T</PARAM_NAME>
        <PARAM_DESCRIPTION>
          <SP>: gain matrices of the filter.</SP>
        </PARAM_DESCRIPTION>
      </PARAM_ITEM>
    </PARAM_INDENT>
  </PARAM>
  <DESCRIPTION>
    <P>
    computes iteratively the minimal solution of the algebraic
    Riccati equation and gives the matrices <VERB>R</VERB> and <VERB>T</VERB> of the 
    filter model, by the Lindquist's algorithm.</P>
  </DESCRIPTION>
  <SEE_ALSO>
    <SEE_ALSO_ITEM>
      <LINK>srfaur</LINK>
    </SEE_ALSO_ITEM>
    <SEE_ALSO_ITEM>
      <LINK>faurre</LINK>
    </SEE_ALSO_ITEM>
    <SEE_ALSO_ITEM>
      <LINK>phc</LINK>
    </SEE_ALSO_ITEM>
  </SEE_ALSO>
  <AUTHOR>G. Le V.  </AUTHOR>
</MAN>
