You are here: Symbol Reference > SignalUtils Namespace > Functions > SignalUtils.ArCovariance Function
DSP Master VCL
ContentsIndex
PreviousUpNext
SignalUtils.ArCovariance Function

Covariance method for autoregressive parameter estimation.

Pascal
procedure ArCovariance(const Src: TVec; Order: integer; const a: TVec; out E: double); overload;

The AR parameters are estimated by minimizing an estimate of the prediction error power, but uses less data points then Yull-Walker (autocorrelation method) estimator. The covariance method can accurately extract frequencies of pure sinusoids. Src contains the data on which the autoregressive parameter estimation (placed in A) should be based. Order defines the Order of the autoregressive process. E is the prediction error. 

References:  

[1] Modern spectral estimation, Steven M. Kay, Prentice-Hall, Page 221

Copyright (c) 1999-2025 by Dew Research. All rights reserved.
What do you think about this topic? Send feedback!