fmodany.tex

时频分析的工具包

% This is part of the TFTB Reference Manual.
% Copyright (C) 1996 CNRS (France) and Rice University (US).
% See the file refguide.tex for copying conditions.



\markright{fmodany}
\hspace*{-1.6cm}{\Large \bf fmodany}

\vspace*{-.4cm}
\hspace*{-1.6cm}\rule[0in]{16.5cm}{.02cm}
\vspace*{.2cm}



{\bf \large \fontfamily{cmss}\selectfont Purpose}\\
\hspace*{1.5cm}
\begin{minipage}[t]{13.5cm}
Signal with arbitrary frequency modulation.
\end{minipage}
\vspace*{.5cm}


{\bf \large \fontfamily{cmss}\selectfont Synopsis}\\
\hspace*{1.5cm}
\begin{minipage}[t]{13.5cm}
\begin{verbatim}
[y,iflaw] = fmodany(iflaw)
[y,iflaw] = fmodany(iflaw,t0)
\end{verbatim}
\end{minipage}
\vspace*{.5cm}


{\bf \large \fontfamily{cmss}\selectfont Description}\\
\hspace*{1.5cm}
\begin{minipage}[t]{13.5cm}
        {\ty fmodany} generates a frequency modulated signal whose
        instantaneous frequency law is approximately given by the vector
        {\ty iflaw} (the integral is approximated by {\ty cumsum}).  The
        phase of this modulation is such that {\ty y(t0)=1}.\\
  
\hspace*{-.5cm}\begin{tabular*}{14cm}{p{1.5cm} p{8.5cm} c}
Name & Description & Default value\\
\hline
        {\ty iflaw} & vector of the instantaneous frequency law samples\\
        {\ty t0}    & time reference          & {\ty 1}\\
  \hline {\ty y}     & output signal\\

\hline
\end{tabular*}

\end{minipage}
\vspace*{1cm}


{\bf \large \fontfamily{cmss}\selectfont Example}\\
\hspace*{1.5cm}
\begin{minipage}[t]{13.5cm}
\begin{verbatim}
         [y1,ifl1]=fmlin(100); [y2,ifl2]=fmsin(100);
         iflaw=[ifl1;ifl2]; sig=fmodany(iflaw); 
         subplot(211); plot(real(sig))
         subplot(212); plot(iflaw); 
\end{verbatim}
This example shows a signal composed of two successive frequency
modulations\,: a linear FM followed by a sinusoidal FM.\\
\end{minipage}
\vspace*{.5cm}


{\bf \large \fontfamily{cmss}\selectfont See Also}\\
\hspace*{1.5cm}
\begin{minipage}[t]{13.5cm}
\begin{verbatim}
fmconst, fmlin, fmsin, fmpar, fmhyp, fmpower.
\end{verbatim}
\end{minipage}