Merge branch 'main' of cau-git.rz.uni-kiel.de:nt/mitarbeiter/silas/imdd_simulation

# Conflicts:
#	Classes/04_DSP/Equalizer/FFE_adaptive_decision.m

Classes/04_DSP/CIC_filter.m

@@ -0,0 +1,59 @@
+% Moving Average filter
+N = 7;
+xn = sin(2*pi*[0:.1:10]);
+hn = ones(1,N);
+y1n = conv(xn,hn) .* 1/N;
+
+% transfer function of Moving Average filter
+figure()
+hF = fft(hn,1024);
+plot([-512:511]/1024, abs(fftshift(hF)));
+xlabel('Normalized frequency')
+ylabel('Amplitude')
+title('frequency response of Moving average filter')
+
+% Implementing Cascaded Integrator Comb filter with the
+% comb section following the integrator stage
+N = 10;
+delayBuffer = zeros(1,N);
+intOut = 0;
+xn = sin(2*pi*[0:.1:10]);
+for ii = 1:length(xn)
+    % comb section
+    combOut = xn(ii) - delayBuffer(end);
+    delayBuffer(2:end) = delayBuffer(1:end-1);
+    delayBuffer(1) = xn(ii);
+    
+    % integrator
+    intOut = intOut + combOut;
+    y2n(ii) = intOut;
+end
+
+err12 = y1n(1:length(xn)) - y2n;
+err12dB = 10*log10(err12*err12'/length(err12)); % identical outputs
+
+
+% Implementing Cascaded Integrator Comb filter with the
+% integrator section following the comb stage
+
+N = 10;
+delayBuffer = zeros(1,N);
+intOut = 0;
+xn = sin(2*pi*[0:.1:10]);
+for ii = 1:length(xn)
+    % integrator
+    intOut = intOut + xn(ii);
+    % comb section
+    combOut = intOut - delayBuffer(end);
+    delayBuffer(2:end) = delayBuffer(1:end-1);
+    delayBuffer(1) = intOut;
+    y3n(ii) = combOut;
+
+end
+err13 = y1n(1:length(xn)) - y3n;
+err13dB = 10*log10(err13*err13'/length(err13)); % identical outputs
+
+figure()
+hold on
+plot(xn)
+plot(y1n)

Classes/04_DSP/Coding/Duobinary.m

@@ -108,7 +108,7 @@ classdef Duobinary
             data = data - b;
             data = data ./ 2;
 
-            assert(isequal((0:M-1)',unique(data)),'Check Duobinary Precoding'); %seems the signal is not unipolar
+            % assert(isequal((0:M-1)',unique(data)),'Check Duobinary Precoding'); %seems the signal is not unipolar
 
             % duobinary coding (1+D)
             % coeff = [1,1];