\begin{thebibliography}{3}
\providecommand{\natexlab}[1]{#1}
\providecommand{\url}[1]{\texttt{#1}}
\expandafter\ifx\csname urlstyle\endcsname\relax
  \providecommand{\doi}[1]{doi: #1}\else
  \providecommand{\doi}{doi: \begingroup \urlstyle{rm}\Url}\fi

\bibitem[Eberhard~Herter(2004)]{Nachrichtentechnik}
Wolfgang~Lörchner Eberhard~Herter.
\newblock \emph{Nachrichtentechnik}.
\newblock Carl Hanser Verlag, 2004.

\bibitem[Hoffmann(2001)]{GdF}
Rüdiger Hoffmann.
\newblock \emph{Grundlagen der Frequenzanalyse}.
\newblock expert Verlag, 2001.

\bibitem[Schnorrenberg(1990)]{Spektrumanalyse}
Werner Schnorrenberg.
\newblock \emph{Spektrumanalyse}.
\newblock Vogel Verlag und Druck KG, 1990.

\end{thebibliography}
