parafrep.tex

小波变换工具包

\markright{correlmx}
\hspace*{-1.6cm}{\Large \bf parafrep}

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{\bf \large \fontfamily{cmss}\selectfont Purpose}\\
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computes a parametric frequency representation of a signal.
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{\bf \large \fontfamily{cmss}\selectfont Synopsis}\\
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\begin{verbatim}
[spec,freqs,A]=parafrep(Rx,N,method)
[spec,freqs,A]=parafrep(Rx,N,'genlag',q)
\end{verbatim}
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{\bf \large \fontfamily{cmss}\selectfont Description}\\
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{\ty correlmx} computes a correlation matrix of a signal.\\

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\begin{tabular*}{14cm}{p{1.5cm} p{8.5cm} c}
Name & Description & Default value\\\hline
{\ty x}      & analyzed signal &  \\ 
{\ty p}      & highest autocorrelation lag. For a given $p$, 
               the size of the autocorrelation matrix will be 
               $(p+1)\times(p+1)$ & \\
{\ty Rxtype} & computation algorithm (default : 'fbhermitian')   & {\ty 'fbhermitian'}\\\hline 
{\ty Rx}     & computed correlation matrix, of size \hbox{$(p+1)\times(p+1)$} & \\\hline 
\end{tabular*}

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{\bf \large \fontfamily{cmss}\selectfont Example}\\
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\begin{verbatim}
N=100; sig=real(fmconst(N,0.1))+0.4*randn(N,1); 
Rx=correlmx(sig,2,'burg'); [v,d] = eig(Rx), acos(-0.5*v(2,1)/v(1,1))/(2*pi)
Rx=correlmx(sig,2,'hermitian'); [v,d] = eig(Rx), acos(-0.5*v(2,1)/v(1,1))/(2*pi)
\end{verbatim}
computes an estimation of the frequency of a sinusoid using the Pisarenko
approach, with a correlation matrix computed by the Burg or the hermitian
algorithm.

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{\bf \large \fontfamily{cmss}\selectfont See Also}\\
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\begin{verbatim}
parafrep, tfrparam
\end{verbatim}
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