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stuff from PC

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This commit is contained in:
Silas Oettinghaus
2023-06-11 13:39:16 +02:00
parent 2aeacafe78
commit 93dd63bb18
7 changed files with 350 additions and 113 deletions
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4
Classes/00_signals/Signal.m
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@@ -22,6 +22,7 @@ classdef Signal
obj.logbook = table(SignalType,TimeStamp,Length,SignalPower,Nase,Description);
end
%% CONVERT TO INFORMATIONSIGNAL
@@ -72,6 +73,7 @@ classdef Signal
end
%% CONVERT TO Opticalsignal
function o_sig = Opticalsignal(obj, options)
@@ -130,7 +132,7 @@ classdef Signal
SignalType = [string(class(obj))];
TimeStamp = [(datetime('now','TimeZone','local','Format','HH:mm:ss'))];
Length = [obj.length];
Length = num2str(obj.length, ['%' sprintf('.%df', 0)]);%[obj.length];
SignalPower = [obj.power];
Nase = [0];

2
Classes/01_transmit/Pulseformer.m
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@@ -132,7 +132,7 @@ classdef Pulseformer
%Check output integrity
if round(up/dn * length(data_in)) ~= length(data_out)
%warning('Check signal length after pulse shaping');
disp('Check signal length after pulse shaping');
%disp('Check signal length after pulse shaping');
end

2
Classes/02_etc/Amplifier.m
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@@ -156,7 +156,7 @@ classdef Amplifier
function [noisy_sig, osnr] = applyAseToSignal(~, opticalsignal, nase_numeric)
noisy_sig = opticalsignal + nase_numeric ;
osnr = pow2db(mean(abs(opticalsignal.^2))/mean(abs(nase_numeric.^2)));
disp(osnr);
% disp(osnr);
end
end
end

3
Functions/calc_ber.m
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@@ -3,10 +3,7 @@ function [bits,errors,BER] = calc_ber(data_in,data_ref,skip)
data_ref=logical(data_ref)';
data_in = logical(data_in)';
bits = 0;
errors=0;
data_ref_overlap=zeros(size(data_ref,1),skip+(length(data_ref)-size(data_in,2)));
data_ref_pointer=0;
% Determine BER
bits = bits+size(data_in,2)-skip;

173
imddmodel.m Normal file
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@@ -0,0 +1,173 @@
function BER = imddmodel(dc_mu,sir,linewidth)
rng(2023);
%% Set Simulation Variables
sir = sir;
delay = 300; %mpi delay in meter
fiblen = 0.5; %main link in km
laser_linewidth = linewidth;
O = 18; %order of prbs
N = 2^(O-1); %length of prbs
[~,seed] = prbs(O,1); %initialize first seed of prbs
% Modulation
M = 4; %PAM-M
bitpattern = zeros(N,log2(M));
% Symbol Rate
fsym = 112e9;
% DAC Rate
fdac = 120e9;
% Simulation oversampling rate "k";
kover = 16;
% ADC Rate
fadc = 256e9;
% Simulation frequency in "analog domain"
fsimu = kover * fdac ;
%% CONSTRUCT ALL CLASSES
digimod = PAMmapper(M,0);
pulseform = Pulseformer("pulseform","rrc","fdac",fdac,"fsym",fsym,"pulselength",32,"rrcalpha",0.1);
awg = AWG('fdac',fdac,'kover',kover,'lpf_active',1,'f_cutoff',56e9,'lpf_type',filtertypes.gaussian,'bit_resolution',5.5);
lp_laser = Filter('filtdegree',1,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.bessel_inp);
u_pi = 3.5;
vbias = (0.5*u_pi)-u_pi;
extmodlaser = EML("mode",eml_mode.im_cosinus,"power",15,"fsimu",fsimu,"lambda",1550,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth);
fib = Fiber("fsimu",fdac*kover,"fiber_length",fiblen,"alpha",0.2,"D",16,"lambda0",thz2nm(193.1),"gamma",0);
reflectionpoint = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",sir);
reflectionprop = Fiber("fsimu",fdac*kover,"fiber_length",2*delay/1000,"alpha",0.2,"D",16,"lambda0",1550,"gamma",0);
opticatten = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",-5);
edfaamp = Amplifier("amp_mode","edfa_increase_nase","gain_mode","output_power","amplification_db",0,"nase_mode","generate_ase","noifig",10.5);
phdiode = Photodiode("fsimu",fdac*kover,"dark_current",0,"responsivity",1,"temperature",20);
lp_diode = Filter('filtdegree',1,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.bessel_inp);
scp = Scope("fsimu",fdac*kover,"fadc",fadc,...
"delay",0,"fixed_delay",0,"lpf_bw",113e9,"filtertype",filtertypes.butterworth,...
"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
"adcresolution",6,"quantbuffer",0.1,'block_dc',1);
eq = EQ("K",2,"plottrain",0,"plotfinal",0,...
"training_length",1024,"training_loops",5,...
"Ne",[50,0,0],"Nb",[0,0,0],...
"DCmu",dc_mu,"DDmu",[0.0004 0.0004 0.0004 0.0004 ],"DFEmu",0.005,"FFEmu",0.00,...
"dd_loops",2,"epsilon",[10 100 1000 ],"M",4,...
"thres",[0.005 0.004 0.0005 ],"l1act",0,"delay",1,"rho",0.0005,"ideal_dfe",0,"DB_aim",0);
%% PROCESS
% PRBS Generation
for i = 1:log2(M)
[bitpattern(:,i),seed] = prbs(O,N,seed);
end
%bitpattern = prms_out';
% Build Inf. signal class
bits = Informationsignal(bitpattern);
% Digi Mod
mod_out = digimod.map(bits);
% merken für EQ training
reference = mod_out;
% shape shape
X = pulseform.process(mod_out);
test = applyPulseShaping(reference.signal,fsym,fdac);
% AWG -> ELECTRICAL DOMAIN
awg_out = awg.process(X);
X = lp_laser.process(awg_out);
X = lp_laser.process(X);
X = X.normalize("mode","oneone");
X.signal = X.signal .* 1.3800;
% Laser; Modulation -> OPTICAL DOMAIN
X = extmodlaser.process(X);
% Fiber Propagation
X = fib.process(X);
%% Reflect with attenuation
R = reflectionpoint.process(X);
% Propagate
R = reflectionprop.process(R);
disp(['SIR ',num2str(10*log10(X.power/R.power))]);
% Delay
R = R.delay("delay_meter",delay);
% Add together
X = X+R;
%%
X = opticatten.process(X);
X = edfaamp.process(X);
% Photo Diode -> ELECTRICAL DOMAIN
X = phdiode.process(X);
X = lp_diode.process(X);
% Oscilloscope (Sampling to f_adc; Quantization; Bandwidth Limitation)
X = scp.process(X);
% Resample to Symbol Rate
X = X.resample("fs_out",2*fsym,"fs_in",fadc);
% Normalize
X = X.normalize("mode","rms");
% Equalizer
X = eq.process(X,reference);
%% MPI reduction
wl = 10000;
mpi_red = X;
mpi_red.signal = X.signal - 1/wl .* movsum( X.signal,[wl/2,wl/2]);
% Digi Demod
demap_out = digimod.demap(X);
demap_out_a1 = digimod.demap(mpi_red);
% BER
[bits,errors,ber] = calc_ber(demap_out.signal(1:end-1,:),bitpattern(1:end,:),0);
[bits,errors,ber_a1] = calc_ber(demap_out_a1.signal(1:end-1,:),bitpattern(1:end,:),0);
disp(['BER: ', sprintf('%2E',ber), ' ERRORS: ' ,num2str(sum(errors))]);
disp(['BER: ', sprintf('%2E',ber_a1), ' ERRORS: ' ,num2str(sum(errors))]);
BER.ber = ber;
BER.ber_a1 = ber_a1;
end

61
run_loop.m Normal file
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@@ -0,0 +1,61 @@
dc_mu = [0 0.001 0.1];
sirloop = -25:1:0;
lw_loop = [0e6:1e6:10e6];
ber = zeros(length(dc_mu),length(sirloop),length(lw_loop));
ber_a1 = zeros(length(dc_mu),length(sirloop),length(lw_loop));
iterations=size(ber);
parfor ix = 1:numel(ber)
[u1,u2,u3] = ind2sub(iterations,ix);
BER = imddmodel(dc_mu(u1),sirloop(u2),lw_loop(u3));
ber(ix) = BER.ber;
ber_a1(ix) = BER.ber_a1;
end
hdfec = 3.8e-3.*ones(size(sirloop));
for dc = 1:size(ber,1)
for lw = 1:size(ber,3)
a = InterX([sirloop;ber(dc,:,lw)],[sirloop;hdfec]);
thres(dc,lw) = -a(1);
end
end
contour(thres,'LineWidth',2);
ylabel("DC Tap");
xlabel("Linewidth in MHz");
yticks(1:length(dc_mu))
yticklabels(dc_mu);
xticks(1:length(lw_loop));
xticklabels(lw_loop*1e-6);
grid on
%
% col = cbrewer2('Paired',12);
% scatter(-1.*thres(1),thres(2),'MarkerEdgeColor',col(2*i,:),'LineWidth',6,'DisplayName',['DC tap ',num2str(dc_mu(i))]);
%
% figure(1)
% hold on
% for i = 1:length(dc_mu)
% plot(-1.*sirloop,ber(i,:),"LineWidth",2,"Marker","o","MarkerSize",3,'Color',col(2*i,:),'DisplayName',['DC tap ',num2str(dc_mu(i))]);
% plot(-1.*sirloop,ber_a1(i,:),"LineWidth",2,"Marker","o","MarkerSize",3,'Color',col(2*i-1,:),'DisplayName',['A1. Linewidth in MHz ',num2str(dc_mu(i)*1e-6)]);
% end
%
% yline(3.8e-3,'LineWidth',2,'LineStyle','--','HandleVisibility','off');
% set(gca,'yscale','log');
% grid minor
% legend
% xlabel("SIR");
% ylabel("BER");
% title("BER for different SIR")

84
setup_simulation.m
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@@ -1,10 +1,16 @@
sir_loop = -30:5:-10;
rng(2020);
for lp = 1:5
sir = sir_loop(lp);
rkey = 13;
rng(rkey);
%% Set Simulation Variables
O = 17; %order of prbs
O = 18; %order of prbs
N = 2^(O-1); %length of prbs
[~,seed] = prbs(O,1); %initialize first seed of prbs
@@ -32,27 +38,30 @@ fsimu = kover * fdac ;
digimod = PAMmapper(M,0);
pulseform = Pulseformer("pulseform","rrc","fdac",fdac,"fsym",fsym,"pulselength",32,"rrcalpha",0.05);
pulseform = Pulseformer("pulseform","rrc","fdac",fdac,"fsym",fsym,"pulselength",32,"rrcalpha",0.1);
awg = AWG('fdac',fdac,'kover',kover,'lpf_active',1,'f_cutoff',56e9,'lpf_type',filtertypes.gaussian,'bit_resolution',5.5);
lp_laser = Filter('filtdegree',1,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.bessel_inp);
u_pi = 4.6;
u_pi = 3.5;
vbias = (0.5*u_pi)-u_pi;
extmodlaser = EML("mode",eml_mode.im_cosinus,"power",5,"fsimu",fsimu,"lambda",1550,"bias",vbias,"u_pi",u_pi,"linewidth",1e6);
fib = Fiber("fsimu",fdac*kover,"fiber_length",1,"alpha",0.2,"D",17,"lambda0",1550,"gamma",0);
fib = Fiber("fsimu",fdac*kover,"fiber_length",0,"alpha",0.2,"D",16,"lambda0",thz2nm(193.1),"gamma",0);
reflectionpoint = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",-20);
reflectionprop = Fiber("fsimu",fdac*kover,"fiber_length",1,"alpha",0.2,"D",17,"lambda0",1550,"gamma",0);
reflectionpoint = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",sir);
reflectionprop = Fiber("fsimu",fdac*kover,"fiber_length",1,"alpha",0.2,"D",16,"lambda0",1550,"gamma",0);
opticatten = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",0);
edfaamp = Amplifier("amp_mode","edfa_increase_nase","gain_mode","output_power","amplification_db",0,"nase_mode","generate_ase","noifig",5);
opticatten = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",-5);
phdiode = Photodiode("fsimu",fdac*kover,"dark_current",2e-08,"responsivity",1,"temperature",20);
edfaamp = Amplifier("amp_mode","edfa_increase_nase","gain_mode","output_power","amplification_db",0,"nase_mode","generate_ase","noifig",10.5);
phdiode = Photodiode("fsimu",fdac*kover,"dark_current",0,"responsivity",1,"temperature",20);
lp_diode = Filter('filtdegree',1,"f_cutoff",50e9,"fsamp",fdac*kover,"filterType",filtertypes.bessel_inp);
@@ -71,11 +80,6 @@ eq = EQ("K",2,"plottrain",0,"plotfinal",0,...
%% PROCESS
fiblen = 0;
for lp1 = 1:length(fiblen)
% change parameters
fib.fiber_length = fiblen(lp1);
% PRBS Generation
@@ -83,7 +87,7 @@ for lp1 = 1:length(fiblen)
[bitpattern(:,i),seed] = prbs(O,N,seed);
end
bitpattern = prms_out';
%bitpattern = prms_out';
% Build Inf. signal class
bits = Informationsignal(bitpattern);
@@ -96,7 +100,6 @@ for lp1 = 1:length(fiblen)
% shape shape
X = pulseform.process(mod_out);
test = applyPulseShaping(reference.signal,fsym,fdac);
% AWG -> ELECTRICAL DOMAIN
awg_out = awg.process(X);
@@ -105,7 +108,7 @@ for lp1 = 1:length(fiblen)
X = lp_laser.process(X);
X = X.normalize("mode","oneone");
X.signal = X.signal .* 1.3800;
X.signal = X.signal .* 0.6*(u_pi/2-abs(((0.5*u_pi)-u_pi/2)));
% Laser; Modulation -> OPTICAL DOMAIN
X = extmodlaser.process(X);
@@ -125,6 +128,8 @@ for lp1 = 1:length(fiblen)
% Add together
X = X+R;
X.spectrum(fsimu,"displayname",['SIR: ',num2str(sir)],"figurename",'spectrum')
%%
X = opticatten.process(X);
X = edfaamp.process(X);
@@ -132,7 +137,8 @@ for lp1 = 1:length(fiblen)
% Photo Diode -> ELECTRICAL DOMAIN
X = phdiode.process(X);
X = lp_diode.process(X);
%X.spectrum(fsimu,"displayname",'diode out','figurename','after diode');
% Oscilloscope (Sampling to f_adc; Quantization; Bandwidth Limitation)
X = scp.process(X);
@@ -144,34 +150,27 @@ for lp1 = 1:length(fiblen)
% Equalizer
eq_out = eq.process(X,reference);
rx_series = eq_out.signal;
% Digi Demod
demap_out = digimod.demap(eq_out);
% BER
[bits,errors,BER] = calc_ber(demap_out.signal(1:end-2,:),bitpattern(1:end,:),0);
[bits,errors,BER] = calc_ber(demap_out.signal(1:end-1,:),bitpattern(1:end,:),1000);
disp(['BER: ', sprintf('%2E',BER), ' ERRORS: ' ,num2str(sum(errors))]);
bercurve(lp1) = BER;
errorscurve(lp1) = sum(errors);
end
%% Generate some Plots
if 1
if 0
col = cbrewer2('Paired',8);
figure(22)
figure(11)
clf
subplot(2,1,1)
hold on
plot(reference.signal(4150:4175),'DisplayName','Tx','Color',col(1,:),'LineWidth',3);
plot(rx_series(4150:4175),'DisplayName','Rx after EQ','Color',col(6,:),'LineWidth',1);
plot(eq_out.signal(4150:4175),'DisplayName','Rx after EQ','Color',col(6,:),'LineWidth',1);
title('Modulated Sequence Zoom');
legend
hold off
@@ -183,24 +182,29 @@ if 1
legend
hold off
end
if 1
col = cbrewer2('Paired',8);
xax = 1:eq_out.length;
figure(12)
figure(3)
sgtitle('')
subplot(1,4,1:2)
scatter(1:4:X.length,X.signal(1:4:end),4,'.','MarkerEdgeColor',col(6,:),'DisplayName','Before EQ');
xlim([1, xax(end)]);
%ylim([-2 2]);
xlabel('Sampling Index')
ylabel('Amplitude')
legend
% subplot(1,4,1:2)
% scatter(1:4:X.length,X.signal(1:4:end),4,'.','MarkerEdgeColor',col(6,:),'DisplayName','Before EQ');
% xlim([1, xax(end)]);
% %ylim([-2 2]);
% xlabel('Sampling Index')
% ylabel('Amplitude')
% legend
subplot(1,4,3:4)
subplot(1,5,lp)
scatter(xax,eq_out.signal,4,'.','MarkerEdgeColor',col(6,:),'DisplayName','After EQ');
xlim([1, xax(end)]);
%ylim([-2 2]);
ylim([-2 2]);
xlabel('Sampling Index')
ylabel('Amplitude')
legend
end
end