hi
in matlab there is a function already called LPC. You can use it or you can
also use levinson algorithm to implement such things in matlab. You can also
convert it into C command by using mcc- command, for more information look those
commands in matlab.
best regards.
ulas bagci
ee eng.
>From: "rahulparthasarthy" <r...@yahoo.com>
>To: m...@yahoogroups.com
>Subject: [matlab]
Estimate LPC's
>Date: Mon, 17 May 2004 22:44:59 -0000
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>
>Hello,
>
>I am trying to compute a solution using the
least- square- error
>principle to an overdetermined system of
equations.
>
>The equation is as below:
>
>Error = summation (y[n] summation
(ai x[n-i] ) ).... in 'ai '
>term
`i' is subscript
>
>where `n' ranges from
1 to 300 and `i' ranges from 1 to 18. The
>outside
summation is for `n' (1,2,3,4,299,300) whereas the inside
>summation is for 'i' (1,2,3,418)
>
>I am interested in calculating `ai ` ( i is subscript)
where 'ai'
>represents Linear Prediction
Coefficients. I could have used the
>Levinson-Durbin
algorithm but in this case, two different signals are
>in
consideration, namely, y[n] and x[n], and hence
>the
`autocorrelation' method cannot be used. I have y[n] and x[n]
>available but not able to evaluate that expression.
>
>I would be obliged if anybody could help me in
solving/evaluating
>the above equation so that I can find
ai's (LP coefficients). Is it
>possible to solve it using
Maple, Matlab, Mathematica etc. or to
>convert it to Ax=B matrix
form. I am interseted in writing a C
>program for the above
expression to calculate LPC's.
>
>Regards,
>Rahul Parthasarthy
>
>
>
