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20. Anhang 202
B_re = B_re_th(1:n_f,:);
F_re = F_re_th(1:n_f);
[m, n] = size(B_re);
aps_lin_re = (2.0 * fenster_flattop * abs(B_re) / ↵
blockgroesse) / sqrt(2.0);
aps_lin_re(1,1:n) = aps_lin_re(1,1:n) ./ 2.0;
aps_lin_mittel_re = sqrt(sum(aps_lin_re.^2, 2)/n);
aps_lin_mittel_dB_re = 20. * log10(aps_lin_mittel_re ./ p_null);
gp_aps_lin_mittel_re = sqrt(1/epsilon_flattop * ↵
sum(aps_lin_mittel_re.^2));
gp_aps_lin_mittel_dB_re = 20. * log10(gp_aps_lin_mittel_re ./ p_null);
aps_dB_re = [F_re, aps_lin_mittel_dB_re];
subplot(2,2,3);
plot(aps_dB_re(:,1), aps_dB_re(:,2));
title(['Kalibriertes APS von Kanal: rechts; AVG: ', num2str(n_block), ↵
'; LpG [dB]: ', num2str(gp_aps_lin_mittel_dB_re,3)]);
xlabel('f [Hz]');
ylabel(['Lp [dB]']);
grid;
elseif i == 2
amp_links = zeitdaten_roh(1:laenge_zeitdaten_roh,1);
kali_fak_li = m_k_bereich(2,1)
amp_links_kali = amp_links(1:wertezahl) * kali_fak_li;
[B_li_th, F_li_th, T_li] = specgram(amp_links_kali, blockgroesse, ↵
abtastrate, window, ueberlappung);
B_li = B_li_th(1:n_f,:);
F_li = F_li_th(1:n_f);
[m, n] = size(B_li);
aps_lin_li = (2.0 * fenster_flattop * abs(B_li) / ↵
blockgroesse) / sqrt(2.0);
aps_lin_li(1,1:n) = aps_lin_li(1,1:n) ./ 2.0;
aps_lin_mittel_li = sqrt(sum(aps_lin_li.^2, 2)/n);
aps_lin_mittel_dB_li = 20. * log10(aps_lin_mittel_li ./ p_null);
gp_aps_lin_mittel_li = sqrt(1/epsilon_flattop * ↵
sum(aps_lin_mittel_li.^2));
gp_aps_lin_mittel_dB_li = 20. * log10(gp_aps_lin_mittel_li ./ p_null);
aps_dB_li = [F_li, aps_lin_mittel_dB_li];
subplot(2,2,4);
plot(aps_dB_li(:,1), aps_dB_li(:,2));
title(['Kalibriertes APS von Kanal: links; AVG: ', num2str(n_block), ↵
'; LpG [dB]: ', num2str(gp_aps_lin_mittel_dB_li,3)]);
xlabel('f [Hz]');
ylabel(['Lp [dB]']);
grid;
end %- if-Anweisung, Kontrolle
end %- if-Anweisung, Programmschleife
Fachhochschule Düsseldorf Diplomarbeit 2002/03, Terence Klitz