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% polynome1
%-------------------
\documentclass[tikz]{standalone}
\usepackage{amsmath}
\usepackage{times}
\usepackage{txfonts}
\usepackage{pgfplots}
\usepackage{csvsimple}
\usepackage{pgfplotstable}
\usepackage{filecontents}
\usetikzlibrary{arrows,intersections,math}
\newcommand{\x}{10}
\newcommand{\y}{-8}
\begin{document}
\tikzset{
node/.style={rectangle, draw=black!100, thick, on grid}, % on grid added
dangling node/.style={node, fill=black!30}
}
\begin{tikzpicture}[]
\filldraw[red] (0,0) circle (5mm);
%Knote
\matrix[draw = none, column sep=20mm, row sep=20mm]{
\node(signal) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Signal}}]
\addplot[] table[col sep=comma] {signal.txt};
\end{axis}
\end{tikzpicture}}; &
\node(codiert) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Codiert}}]
\addplot[] table[col sep=comma] {codiert.txt};
\end{axis}
\end{tikzpicture}}; \\
&\node(fehler) [] {
\begin{tikzpicture}
\begin{axis}[scale=0.6, title = {\Large {Fehler}}]
\addplot[] table[col sep=comma] {fehler.txt};
\end{axis}
\end{tikzpicture}};\\
\node(decodiert) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Decodiert}}]
\addplot[] table[col sep=comma] {decodiert.txt};
\end{axis}
\end{tikzpicture}}; &
\node(empfangen) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Empfangen}}]
\addplot[] table[col sep=comma] {empfangen.txt};
\end{axis}
\end{tikzpicture}};\\
\node(syndrom) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Syndrom}}]
\addplot[] table[col sep=comma] {syndrom.txt};
\end{axis}
\end{tikzpicture}}; &
\node(locator) [] {
\begin{tikzpicture}
\begin{axis}[title = {\Large {Locator}}]
\addplot[] table[col sep=comma] {locator.txt};
\end{axis}
\end{tikzpicture}};\\
};
%FFT & IFFT deskription
\draw[thin,gray,dashed] (0,15) to (0,-15);
\node(FFT) [ scale=0.7] at (0,15.3) {FFT IFFT};
%Arrows
\draw[ultra thick, ->] (signal.east) to (codiert.west);
\draw[ultra thick, ->] (codiert.south) to (fehler.north);
\draw[ultra thick, ->] (fehler.south) to (empfangen.north);
\draw[ultra thick, ->] (empfangen.west) to (decodiert.east);
\draw[ultra thick, ->] (syndrom.east) to (locator.west);
\draw(decodiert.south east)++(-1.8,1) ellipse (1.3cm and 0.8cm) ++(-1.3,0) coordinate(zoom) ;
\draw[ultra thick, ->] (zoom) to[out=180, in=90] (syndrom.north);
\end{tikzpicture}
\end{document}
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