New MPI mitigation schemes // Duobinary // Start of FTN schemes

projects/standard_system/sensitivity_analysis.m

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+M           = wh.parameter.M.values(1);
+datarates    = wh.parameter.datarate.values;
+rop         = wh.parameter.rop.values;
+
+
+cnt = 1;
+for dr = datarates
+
+    ber_ffe          = wh.getStoValue('ber_ffe',M,dr,rop);
+
+    sens_ffe(cnt)    = getIntersection(ber_ffe,rop);
+
+    figure(112)
+    hold on
+    plot(rop,ber_ffe,"LineWidth",0.5,"LineStyle","-","Marker",".","MarkerSize",15,"DisplayName",['FFE only; ',num2str(dr), ' Gbps']);
+    yline(3.8e-3,'DisplayName','HD-FEC','LineStyle','--','HandleVisibility','off');
+    xlabel('Received Optical Power (dBm)');
+    ylabel('Bit Error Rate (BER)');
+    title('Bit Error Rate vs. ROP');
+    set(gca,'yscale','log');
+    set(gca,'Box','on');
+    grid on;
+    grid minor
+    legend
+
+    cnt = cnt+1;
+
+end
+
+
+figure(223);
+hold on; % Retain the plot so new points can be added without complete redraw
+plot(datarates,sens_ffe,"LineWidth",1,"LineStyle","-","Marker",".","MarkerSize",10,"DisplayName",['Linewidth: ',num2str(laser_linewidth.*1e-6),' MHz']);
+xlabel('Signal to Interference Ratio (dB)');
+ylabel('Receiver Sensitivity');
+title(['Bit Error Rate vs. SIR']);
+grid on;
+legend
+
+
+function i = getIntersection(ber,rop)
+
+%get intersection between rop curve and hd-fec limit
+hdfec = 3.8e-3 .* ones(size(ber));
+i = InterX([rop;hdfec'],[rop;ber']);
+
+if isempty(i)
+    i = NaN;
+else
+    i = i(1);
+end
+end
+
+