Update April

projects/MPI_April/simulate_tx_sig.m

@@ -0,0 +1,55 @@
+function simulate_tx_sig(filename)
+
+    %% Params
+    M=4;
+    digimod     = PAMmapper(M,0);
+    
+    fdac = 120e9;
+    fsym = 112e9;
+    pulseform   = Pulseformer("pulseform","rrc","fdac",fdac,"fsym",fsym,"pulselength",32,"rrcalpha",0.027);
+    
+    kover = 16;
+    awg         = AWG('fdac',fdac,'kover',kover,'lpf_active',1,'f_cutoff',56e9,'lpf_type',filtertypes.gaussian,'bit_resolution',5.5);
+    %awg = M8199B();
+    
+    lp_laser    = Filter('filtdegree',2,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.butterworth);
+    
+
+    
+    %% PROCESS TX
+    
+    % 1) PRBS Generation
+    O = 20; %order of prbs
+    N = 2^(O-1); %length of prbs
+    [~,seed] = prbs(O,1); %initialize first seed of prbs
+    for i = 1:log2(M)
+        [bitpattern(:,i),seed] = prbs(O,N,seed);
+    end
+    
+    % 2 ) Build Inf. signal class
+    bits = Informationsignal(bitpattern);
+    
+    % 3) Digi modulation -> PAM-M signal
+    digimod_out = digimod.map(bits);
+    
+    % 4) Pulse shaping -> racos
+    X = pulseform.process(digimod_out);
+    
+    % 5) AWG (lowpass, quantization, sample and hold)
+    X = awg.process(X);
+    
+    % 6) Lowpass behavior before laser
+    X = lp_laser.process(X);
+    
+    % 7) Normalize signal
+    X = X.normalize("mode","oneone");
+    X.signal = X.signal;
+    
+    spectrum_plot(X.signal',X.fs,'spectrum');
+    
+    if nargin == 1
+        save(['C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\',char(filename)],'X');
+    end
+
+end
+