Working from home on zürich DSP.

Classes/01_transmit/PAMsource.m

@@ -71,20 +71,17 @@ classdef PAMsource
         function  [digi_sig,symbols,bits] = process(obj)
 
             %%%%% PRBS Generation in correct shape for Modulation Format %%%%%%
-            O = obj.order; %order of prbs
-            N = 2^(O-1); %length of prbs
-            [~,seed] = prbs(O,1); %initialize first seed of prbs
             bitpattern=[];
 
             if obj.useprbs
-                % for i = 1:log2(obj.M)
+                %     O = obj.order; %order of prbs
-                %     [bitpattern(:,i),seed] = prbs(O,N,seed);
+                %     N = 2^(O-1); %length of prbs
-                % end
+                %     [~,seed] = prbs(O,1); %initialize first seed of prbs
+                %     % for i = 1:log2(obj.M)
+                %     %     [bitpattern(:,i),seed] = prbs(O,N,seed);
+                %     % end
 
                 %%%%% MOVE-IT PRMS %%%%
-
-                
-
                 state = struct();
 
                 para = struct();
@@ -155,24 +152,46 @@ classdef PAMsource
                 sym_max = max(symbols.signal);
             end
 
-            % symbols.spectrum("fignum",111,"displayname","1) RAW SIGNAL");
 
-            pulsf = Moveit_wrapper('pulsef');
-            pulsf.para.alpharacos = obj.pulseformer.alpha;
-            pulsf.para.f_sym = obj.fsym;
-            pulsf.para.fs = obj.fsym;
-            pulsf.para.pulse = 'racos';
-
-            pulsf.process(symbols);
 
             %%%%% Pulse-forming %%%%%%
             if obj.applypulseform
+                %%% MY CODE
                 digi_sig = obj.pulseformer.process(symbols);
+
+                %%% MOVEIT WRAPPER BETA
+                % symbols.spectrum("fignum",111,"displayname","1) RAW SIGNAL");
+                % 
+                % pulsf = Moveit_wrapper('pulsef');
+                % pulsf.para.alpharacos = obj.pulseformer.alpha;
+                % pulsf.para.f_sym = obj.fsym;
+                % pulsf.para.fs = obj.fsym;
+                % pulsf.para.pulse = 2;
+                %
+                % digi_sig = pulsf.process(symbols);
+
+                % Design raised cosine filter with given order in symbols
+                % digi_sig = symbols;
+                % sps = 4;
+                % nsym = 128;
+                % rctFilt3 = comm.RaisedCosineTransmitFilter(...
+                %     Shape='Square root', ...
+                %     RolloffFactor=1, ...
+                %     FilterSpanInSymbols=nsym, ...
+                %     OutputSamplesPerSymbol=sps);
+                % 
+                % digi_sig.signal = rctFilt3([symbols.signal; zeros(nsym/2,1)]);
+                % % Correct for propagation delay by removing filter transients
+                % fltDelay = nsym / (2*obj.fsym);
+                % digi_sig.signal = digi_sig.signal(fltDelay*sps*obj.fsym+1:end);
+                % 
+                % digi_sig.fs = sps .* symbols.fs;
+
+
             else
                 digi_sig = symbols;
             end
 
-            % digi_sig.spectrum("fignum",112,"displayname","2) after pulseforming");
 
             %%%%% Re-sample to f DAC %%%%%%
             n = 10;

Classes/Moveit_wrapper.m

@@ -110,7 +110,7 @@ classdef Moveit_wrapper < handle
                 previousLevel = currentLevel;
 
                 % Determine input type from obj.comment.type
-                if  
+                if  1
                     inputType = obj.comment.type.(fieldName);
                 else
                     inputType = 'number'; % Default type

Functions/EQ_structures/duobinary_target.m

@@ -9,6 +9,7 @@ arguments
     tx_bits 
     options.precode_mode db_mode
     options.showAnalysis = 0;
+    options.eth_style_symbol_mapping = 0;
 end
     
     %Duobinary Targeting
@@ -18,7 +19,7 @@ end
     % dir = [1,1];
     mlse_sig_sd = mlse_.process(eq_signal);
 
-    mlse_sig_hd = PAMmapper(M,0).quantize(mlse_sig_sd);
+    mlse_sig_hd = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).quantize(mlse_sig_sd);
     
     % precoding to mitigate error propagation, most prominently used in
     % combination with duobinary signaling to avoid catastrophic error
@@ -37,12 +38,12 @@ end
         tx_symbols_precoded = Duobinary().encode(tx_symbols);
         tx_symbols_precoded = Duobinary().decode(tx_symbols_precoded);
 
-        tx_bits = PAMmapper(M,0).demap(tx_symbols_precoded);
+        tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols_precoded);
 
         case db_mode.db_discard
 
         % normal dsp for precoded sequence == discard/omit/ignore precode
-        tx_bits = PAMmapper(M,0).demap(tx_symbols);
+        tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols);
 
         case db_mode.db_encoded
 
@@ -56,7 +57,7 @@ end
     end
 
     % M = numel(unique(tx_symbols.signal));
-    rx_bits = PAMmapper(M,0).demap(mlse_sig_hd);
+    rx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(mlse_sig_hd);
 
     [~,numErrors,ber,~] = calc_ber(rx_bits.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
 
@@ -66,11 +67,15 @@ end
     if options.showAnalysis
         eq_noise = eq_noise - mean(eq_noise.signal);
 
-rx_signal.spectrum("normalizeTo0dB",1,"fignum",250);
+        rx_signal.spectrum("normalizeTo0dB",1,"fignum",250,"displayname","Rx Spectrum");
+
+        Duobinary().encode(tx_symbols).spectrum("normalizeTo0dB",1,"fignum",250,"displayname","DB encoded reference");
+
+        showEQNoisePSD(eq_noise,"fignum",250,"displayname",'Duobinary Target Noise after Equalization');
+
+        fprintf('DB tgt BER: %.2e \n',ber);
 
-        showEQNoisePSD(eq_noise,"fignum",250,"displayname",'Duobinary Target Noise');
         
-          Duobinary().encode(tx_symbols).spectrum("normalizeTo0dB",1,"fignum",250);
     end
 
 

Functions/EQ_structures/vnle.m

@@ -74,20 +74,21 @@ function [eq_package] = vnle(eq_,M,rx_signal,tx_symbols,tx_bits,options)
     [~,numErrors,ber,~] = calc_ber(rx_bits.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
     [evm_total,evm_lvl] = calc_evm(eq_signal_sd,tx_symbols);
     [inf_rate] = calc_air(eq_signal_sd,tx_symbols,"skip_front",10000,"skip_end",10000);
-    snr(eq_signal_sd.signal,eq_noise.signal)
 
 
     eq_package.ber_vnle     = ber;
     eq_package.evm_total    = evm_total;
     eq_package.evm_lvl      = evm_lvl;
     eq_package.inf_rate_vnle = inf_rate;
-
     eq_package.snr = snr(eq_signal_sd.signal,eq_noise.signal);
 
+    eq_package.signal = eq_signal_sd;
+
 
     if options.showAnalysis
 
-        snr(eq_signal_sd.signal,eq_noise.signal);
+        fprintf('SNR: %d dB \n',snr(eq_signal_sd.signal,eq_noise.signal));
+
         fprintf(['VNLE EVM lvl: ',repmat('%.3f ',1,numel(evm_lvl)),' \n'],evm_lvl);
 
         fprintf('VNLE BER: %.2e \n',ber);

Functions/EQ_structures/vnle_postfilter_mlse.m

@@ -10,6 +10,7 @@ arguments
     tx_bits 
     options.precode_mode db_mode
     options.showAnalysis = 0;
+    options.eth_style_symbol_mapping = 0;
 end
 
     %FFE or VNLE
@@ -23,7 +24,7 @@ end
     % [mlse_sig_hd,mlse_sig_sd] = mlse_.process(mlse_sig_sd,tx_symbols);
     mlse_sig_sd = mlse_.process(mlse_sig_sd);
 
-    mlse_sig_hd = PAMmapper(M,0).quantize(mlse_sig_sd);
+    mlse_sig_hd = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).quantize(mlse_sig_sd);
 
     % precoding to mitigate error propagation, most prominently used in
     % combination with duobinary signaling to avoid catastrophic error
@@ -46,12 +47,12 @@ end
         tx_symbols_precoded = Duobinary().encode(tx_symbols);
         tx_symbols_precoded = Duobinary().decode(tx_symbols_precoded);
 
-        tx_bits = PAMmapper(M,0).demap(tx_symbols_precoded);
+        tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols_precoded);
 
         case db_mode.db_discard
 
         % normal dsp for precoded sequence == discard/omit/ignore precode
-        tx_bits = PAMmapper(M,0).demap(tx_symbols);
+        tx_bits = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(tx_symbols);
 
         case db_mode.db_encoded
 
@@ -68,7 +69,7 @@ end
     end
 
     % METRICS OF VNLE %
-    rx_bits_vnle = PAMmapper(M,0).demap(eq_signal_hd);
+    rx_bits_vnle = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(eq_signal_hd);
     [~,~,ber_vnle,~] = calc_ber(rx_bits_vnle.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
     
     % correct TUM implementation of AIR
@@ -76,7 +77,7 @@ end
     [evm_vnle_total,evm_vnle_lvl] = calc_evm(eq_signal_sd,tx_symbols);
 
     % METRICS OF MLSE (HD-VITERBI)
-    rx_bits_mlse = PAMmapper(M,0).demap(mlse_sig_hd);
+    rx_bits_mlse = PAMmapper(M,0,"eth_style",options.eth_style_symbol_mapping).demap(mlse_sig_hd);
     [~,~,ber_mlse,~] = calc_ber(rx_bits_mlse.signal,tx_bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
 
 

projects/IMDD_base_system/imdd_it.m

@@ -6,20 +6,13 @@ if 1
     uloops.precomp      = [0];
     uloops.db_precode   = [0];
     uloops.bitrate      = [330].*1e9; %[300,330,360,390,420,450,480]
-    uloops.precomp      = [1];
-    uloops.db_precode   = [0];
-    uloops.bitrate      = [300,330,360,390,420,450,480].*1e9; %[300,330,360,390,420,450,480]
-    % uloops.bitrate      = 390e9;
-    % uloops.laser_wavelength = [1293,1297.5,1302,1306.5,1310,1313.4,1318,1322.7,1327.4];
-    uloops.laser_wavelength = [1293];
-    uloops.M            = [4];
     uloops.laser_wavelength = [1310];
     uloops.M            = [6];
     uloops.link_length  = [2]; % 1,2,3,5,6,8,10
     wh = DataStorage(uloops);
     wh.addStorage("ber");
     
-    wh = submit_simulations(wh,"parallel",0,"simulation_mode",0);
+    wh = submit_simulations(wh,"parallel",0,"simulation_mode",1);
 end
 
 wh_ana = wh;

projects/IMDD_base_system/imdd_model.m

@@ -35,7 +35,7 @@ tx_bw_nyquist   = 0.8;
 link_length     = 1;
 
 % RX
-rop = -8;
+rop = -5;
 rx_bw_nyquist = 0.8;
 
 vnle_order1 = 50;
@@ -61,7 +61,7 @@ mu_dfe = 0.0004;
 
 dfe_ = sum(dfe_order)>0;
 
-doub_mode = db_mode.db_precoded;
+doub_mode = db_mode.no_db;
 
 %%% change specific parameter if given in varargin
 % Parse optional input arguments
@@ -132,10 +132,14 @@ f_nyquist       = fsym/2;
 %%% run the simulation or measurement or ...
 if simulation_mode
 
-    Pform       = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rcalpha);
+    rcalpha = 1;
+    Pform       = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"alpha",rcalpha);
 
+    db_precode = 0;
+    db_encode = 0;
+    apply_pulsef = 1;
     [Digi_sig,Symbols,Tx_bits] = PAMsource(...
-        "fsym",fsym,"M",M,"order",16,"useprbs",0,...
+        "fsym",fsym,"M",M,"order",18,"useprbs",1,...
         "fs_out",fdac,...
         "applyclipping",0,"clipfactor",1.5,...
         "applypulseform",apply_pulsef,"pulseformer",Pform,...
@@ -143,7 +147,7 @@ if simulation_mod