add few files from home pc

projects/Messung_Zürich/minimal_matched.m

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+L        = 4;         % Oversampling factor
+fsym = 1e9/4;
+rollOff  = 0.5;       % Pulse shaping roll-off factor
+htx = rcosdesign(rollOff,16, L, 'sqrt');
+hrx  = conj(fliplr(htx));
+
+signal = zeros(1000,1);
+signal(500) = 1;
+Digi_sig = Informationsignal(signal,"fs",fsym);
+
+% Digi_sig = Digi_sig.resample("fs_out",L*fsym);
+% 
+% Digi_sig_tx = Digi_sig.filter(htx,1);
+% Digi_sig_rx = Digi_sig_tx.filter(hrx,1);
+% 
+% figure;plot(Digi_sig_tx.signal);hold on;plot(Digi_sig_rx.signal),plot(Digi_sig.signal);
+% 
+% 
+% 
+% 
+pulsef = Pulseformer("alpha",1,"matched",0,"fdac",Digi_sig.fs*L,"fsym",fsym,"pulse","rrc","pulselength",16);
+Digi_sig = pulsef.process(Digi_sig);
+
+pulsef = Pulseformer("alpha",1,"matched",1,"fdac",Digi_sig.fs,"fsym",fsym,"pulse","rrc","pulselength",16);
+Digi_sig_matched = pulsef.process(Digi_sig);
+
+% Filter:
+htx = rcosdesign(rollOff,16, L, 'sqrt');
+% Note half of the target delay is used, because when combined
+% to the matched filter, the total delay will be achieved.
+hrx  = conj(fliplr(htx));
+
+figure
+plot(htx)
+title('Transmit Filter')
+xlabel('Index')
+ylabel('Amplitude')
+
+figure
+plot(hrx)
+title('Rx Filter (Matched Filter)')
+xlabel('Index')
+ylabel('Amplitude')
+
+p = conv(htx,hrx);
+
+figure
+plot(p)
+title('Combined Tx-Rx = Raised Cosine')
+xlabel('Index')
+ylabel('Amplitude')
+
+% And let's highlight the zero-crossings
+zeroCrossings = NaN*ones(size(p));
+zeroCrossings(1:L:end) = 0;
+zeroCrossings((rcDelay)*L + 1) = NaN; % Except for the central index
+hold on
+plot(zeroCrossings, 'o')
+legend('RC Pulse', 'Zero Crossings')
+hold off