Signal Processing Toolbox

rc2ac

Convert reflection coefficients to an autocorrelation sequence.

Syntax

r = rc2ac(k,r0)

Description

r = rc2ac(k,r0) finds the autocorrelation coefficients, r, of the output of the discrete-time prediction error filter from the lattice-form reflection coefficients k and initial zero-lag autocorrelation r0.

Examples

k = [0.3090    0.9800    0.0031    0.0082   -0.0082];
r0 = 0.1;
a = rc2ac(k,r0)
a =
    0.1000
   -0.0309
   -0.0791
    0.0787
    0.0294
   -0.0950

See Also

ac2rc	Convert an autocorrelation sequence to reflection coefficients.
poly2ac	Convert a prediction filter polynomial to an autocorrelation sequence.
rc2poly	Convert reflection coefficients to a prediction filter polynomial.

References

[1] Kay, S.M., Modern Spectral Estimation, Prentice-Hall, Englewood Cliffs, NJ, 1988.

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rc2is