start ofc analysis

projects/Lab_2024/offline_dsp_analysis/load_n_dsp.m

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+
+% load data points
+
+foldername = 'C:\Users\Silas\Nextcloud4\Dokumente\02_Ablage_Office\Lab_Data_24\sir_sweep_pam4';
+filename = 'PAM4_10km';
+
+stuff = load([foldername,filesep,filename,'_wh']);
+wh = stuff.obj;
+i_atten_vals = wh.parameter.i_atten.values;
+v_bias = wh.parameter.vbias.values(1);
+awg_vpp = wh.parameter.awg_vpp.values(1);
+eq_mode = wh.parameter.eq_mode.values(1);
+
+
+
+% Tx Bits
+% Tx Symbols
+% Rx Signal
+
+Bits = load([foldername, filesep, filename, '_bits'],'Bits');
+Bits = Bits.Bits;
+Symbols = load([foldername, filesep, filename, '_symbols_92gbd'],'Symbols');
+Symbols = Symbols.Symbols;
+
+Eq = EQ("Ne",[50,7,7],"Nb",[0,0,0],"training_length",4096*2,"training_loops",5,"dd_loops",5,"K",2,"DCmu",0.0,"DDmu",[0.0004 0.0004 0.0004 0.0004 ],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
+
+
+for atten = 0:4:40
+    Signal_cell = load([foldername, filesep, filename, '_rx_signal_iatten_',num2str(atten)]);
+    Scpe_sig = Signal_cell.S{1};
+
+    bers = wh.getStoValue('ber',v_bias,awg_vpp,eq_mode,atten);
+
+
+    [EQ_sig] = Eq.process(Scpe_sig,Symbols);
+
+    EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);
+
+    Noi = EQ_sig-Symbols;
+
+    Rx_bits = PAMmapper(M,0).demap(EQ_sig);
+    [~,errors_bm,ber_ffe_only,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
+
+    nc = 2;
+    burg_coeff = arburg(Noi.signal,nc);
+
+    EQ_sig = EQ_sig.filter(burg_coeff,1);
+
+    if 1
+        Noi.spectrum('displayname','Noise PSD','fignum',123)
+        [h,w] = freqz(1,burg_coeff,length(Noi),"whole",Noi.fs);
+        h = h/max(abs(h));
+        hold on
+        w_ = (w - Noi.fs/2);
+        plot(w_.*1e-9,20*log10(fftshift(h)),'DisplayName',['', num2str(nc), ' coefficients for burg alg.']);
+    end
+
+    if 0
+        figure(53);
+        constellation = unique(Symbols.signal);
+        received = NaN(numel(constellation),length(Symbols));
+        for lvl = 1:numel(constellation)
+            received(lvl,Symbols.signal==constellation(lvl)) = EQ_sig.signal(Symbols.signal==constellation(lvl));
+            hold on
+            histogram(received(lvl,:),1000,"EdgeAlpha",0);
+        end
+    end
+
+    EQ_sig = MLSE("DIR",burg_coeff,"duobinary_output",0,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
+
+    Rx_bits = PAMmapper(M,0).demap(EQ_sig);
+    [~,errors_bm,ber,errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
+
+    disp(['FFE: ',sprintf('%.1E',ber_ffe_only),' -> PF -> MLSE: ',sprintf('%.1E',ber),'  dB | PD_in: ',num2str(pd_in),' dBm']);
+
+end
+
+
+
+
+cols = linspecer(8);
+
+i_atten_vals = wh.parameter.i_atten.values;
+v_bias = wh.parameter.vbias.values(1);
+awg_vpp = wh.parameter.awg_vpp.values(1);
+eq_mode = wh.parameter.eq_mode.values(1);
+
+bers = wh.getStoValue('ber',v_bias,awg_vpp,eq_mode,i_atten_vals);
+
+figure(90);
+hold on; % Retain the plot so new points can be added without complete redraw
+
+% Plot the data and get the line handle
+hLine = plot(i_atten_vals, bers, "LineWidth", 0.5, "LineStyle", "-", "Marker", ".", "MarkerSize", 15, "DisplayName", 'nbla');
+
+% Customize the data tips
+% Set labels for existing data tip rows
+hLine.DataTipTemplate.DataTipRows(1).Label = 'Fsym';
+hLine.DataTipTemplate.DataTipRows(2).Label = 'BER';
+hLine.DataTipTemplate.DataTipRows(2).Format = '%.2e'; % Format BER as "3e-4"
+
+
+% Continue with the rest of your plot settings
+yline(3.8e-3, 'DisplayName', 'HD-FEC', 'LineStyle', '--', 'HandleVisibility', 'off');
+xlabel('Signal to Interference Ratio in dB');
+ylabel('Bit Error Rate (BER)');
+title('Bit Error Rate vs. SIR');
+set(gca, 'yscale', 'log');
+set(gca, 'Box', 'on');
+grid on;
+grid minor;
+legend('Interpreter', 'none');
+
+
+autoArrangeFigures(3,3,2)
+
+disp("measurement done")