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- refactored

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jens
2022-06-30 13:32:40 +02:00
parent 77cd5261b1
commit 776932e5d1
144 changed files with 0 additions and 38 deletions
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common/buch/l24.m
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% ##################################################################################
% ## Loesung: Spektraltransformation reeller Bandpass-Signale ##
% ## -------------------------------------------------------------------------- ##
% ## Benoetigte(s) m-File(s): lband.m ##
% ##################################################################################
NFFT = 2^10;
b1 = lband(1000,0.2,0.02); fT = 0:1/NFFT:1-1/NFFT;
% Originalsignal
b2 = b1; lb = length(b2); aB2_hn=abs(fft(b2.*hanning(lb),NFFT));
figure; plot(fT, aB2_hn); axis([0 1 0 1.1*max(aB2_hn)]); xlabel('Omega/2pi = f T');
ylabel('|B(exp(j*Omega))|');
for k=[9 10 11 12] %Unterabtastung um Faktor k
b2 = b1(1:k:1000); lb = length(b2); aB2_hn=abs(fft(b2.*hanning(lb),NFFT));
figure; plot(fT,aB2_hn); axis([0 1 0 1.1*max(aB2_hn)]); xlabel('Omega/2pi = f T');
ylabel('|B_M(exp(j*Omega))|'); title(sprintf('Unterabtastung um Faktor M=%d',k));
end;
% ##### EOF #####