for M = [2 4 8]
    bits = Signalgenerator("form", signalform.prms,"M", M,"order", 15).process();

    symbols = PAMmapper(M,0).map(bits);

    symbols_pre = Duobinary().precode(symbols);

    symbols_db = Duobinary().encode(symbols_pre);

    symbols_rx = Duobinary().decode(symbols_db);

    % Vergleichen von b(n) und d_dec(n)
    bits_rx = PAMmapper(M,0).demap(symbols_rx);
    [~,~,ber,~] = calc_ber(bits.signal,bits_rx.signal,"skip_front",10,"skip_end",10,"returnErrorLocation",1);
    disp(['BER: ',sprintf('%.1E',ber),' - - PAM-',num2str(M)]);
end