documentclass[
a4paper,            %   Papierformat A4
12pt,               %   Schrift 12-Punkt
headsepline,        %   mit Linie unter der Kopfzeile
numbers=noenddot,   %   Nummern ohne Punkt am Ende
bibliography=totoc, %   Literaturverzeichnis mit Nummer im
Inhaltsverzeichnis (``TO Table Of Contents'')
index=totoc,        %   Index mit Nummer im Inhaltsverzeichnis
fleqn,              %   Formeln werden linksbündig statt zentriert
angeordnet
headings=normal     %       Etwas kleinere Überschriften
]{scrreprt}
usepackage{tikz}
usepackage{subfigure}
usepackage{adjustbox}
usepackage{graphics}
usepackage[first=1, last=4]{lcg}
usetikzlibrary{matrix, positioning}



begin{document}

    begin{figure}[!htb]

    begin{tikzpicture}[font=sffamily]
    matrix[matrix of nodes, nodes in empty cells, column sep=-pgflinewidth, row sep=-pgflinewidth,
    nodes = {minimum height=7mm, minimum width=1cm, anchor=center, draw, fill=white, inner sep=0, outer sep = 0},
    %column 1/.style={nodes={fill=orange}},
    %row 1/.style={nodes={fill=green}},
    %row 1 column 1/.style={nodes={draw=none, fill=none}},
    w/.style={fill=white},
    label=above:Digi Input] (Clusters) {
        &&&&&&&&&&&&&&&\[10cm]
    };

    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (-6.5,-4) {Modul 1};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (-2.5,-4) {Modul 2};
    node[ minimum height=4cm,minimum width=3cm] at (0,-4) {$cdots$};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (2.5,-4) {Modul 875};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (6.5,-4) {Modul 876};
    %foreach x in {1,2,...,5}
    newcounter{myrandom}{rand}
    foreach x in {-7.5, -6.5,..., 7.5}
        {   %rand;
            draw [->, line width=0.5mm] (x,-0.35) -- (-6.5,-2);}
    %draw [fill=gray] (-8,-4) rectangle (-6,-1);
    %draw [->, line width=0.5mm] (-7.5,-0.35) -- (-7,-0.95);
    %node[font=Hugesffamily, draw] {Skippd};
    %node[font=Hugesffamily, below left=0pt of Clusters-3-14.north east] {Skipped};



    matrix[matrix of nodes, nodes in empty cells, column sep=-pgflinewidth, row sep=-pgflinewidth,
    nodes = {minimum height=7mm, minimum width=1cm, anchor=center, draw, fill=white},
    %column 1/.style={nodes={fill=orange}},
    %row 1/.style={nodes={fill=green}},
    %row 1 column 1/.style={nodes={draw=none, fill=none}},
    w/.style={fill=white},
    label=below:Cluster Output] at (0,-8)(Cluster Output) {
        &&&&&&&&&&&&&&&\
    };
    end{tikzpicture}
    begin{tikzpicture}[font=sffamily]
    matrix[matrix of nodes, nodes in empty cells, column sep=-pgflinewidth, row sep=-pgflinewidth,
    nodes = {minimum height=7mm, minimum width=1cm, anchor=center, draw, fill=white, inner sep=0, outer sep = 0},
    %column 1/.style={nodes={fill=orange}},
    %row 1/.style={nodes={fill=green}},
    %row 1 column 1/.style={nodes={draw=none, fill=none}},
    w/.style={fill=white},
    label=above:Digi Input] (Clusters) {
        &&&&&&&&&&&&&&&\[10cm]
    };

    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (-6.5,-4) {Modul 1};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (-2.5,-4) {Modul 2};
    node[ minimum height=4cm,minimum width=3cm] at (0,-4) {$cdots$};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (2.5,-4) {Modul 875};
    node[draw, shape=rectangle, minimum height=4cm,minimum width=3cm] at (6.5,-4) {Modul 876};

    %draw [->, line width=0.5mm] (-7.5,-0.35) -- (-6.5,-2);
    %draw [fill=gray] (-8,-4) rectangle (-6,-1);
    %draw [->, line width=0.5mm] (-7.5,-0.35) -- (-7,-0.95);
    %node[font=Hugesffamily, draw] {Skippd};
    %node[font=Hugesffamily, below left=0pt of Clusters-3-14.north east] {Skipped};



    matrix[matrix of nodes, nodes in empty cells, column sep=-pgflinewidth, row sep=-pgflinewidth,
    nodes = {minimum height=7mm, minimum width=1cm, anchor=center, draw, fill=white},
    %column 1/.style={nodes={fill=orange}},
    %row 1/.style={nodes={fill=green}},
    %row 1 column 1/.style={nodes={draw=none, fill=none}},
    w/.style={fill=white},
    label=below:Cluster Output] at (0,-8)(Cluster Output) {
        &&&&&&&&&&&&&&&\
    };
    end{tikzpicture}
    caption{Lokale Rekonstruktion}
    end{figure}
end{document}