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während Diss, 400G plots

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This commit is contained in:
Silas Oettinghaus
2026-08-13 10:22:01 +02:00
parent 7a9deaeb0c
commit c77327d39f
27 changed files with 1769 additions and 248 deletions
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175
projects/Diss/400G_revisit/RX_sprectra.m
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@@ -8,7 +8,7 @@ dsp_options.recipe = @dsp_400g_recipe;
dsp_options.append_to_db = false;
% dsp_options.append_mpi_reduction_db = false;
dsp_options.start_occurence = 1;
dsp_options.max_occurences = 3;
dsp_options.max_occurences = 16;
dsp_options.debug_plots = false;
@@ -33,65 +33,148 @@ db = DBHandler("dataBase", [dsp_options.dataBase], ...
"password", dsp_options.password);
%% Load normal Signal w/o preemphasis
fp = QueryFilter();
fp.where('Runs','fiber_length','EQUALS', 10);
fp.where('Runs','wavelength','EQUALS', 1310);
fp.where('Runs','bitrate','EQUALS', 420e9);
fp.where('Runs','pam_level','EQUALS', 4);
fp.where('Runs','rop_attenuation','EQUALS', 0);
fp.where('Runs','is_mpi','EQUALS', 0);
fp.where('Runs', 'db_mode','EQUALS', 0);
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
cols = cbrewer2('Spectral',6);
cols = linspecer(2);
len = [1 2 3 5 6 8 10];
idx = 1;
for lambda = 1302%[1297.5]
fp = QueryFilter();
len = 10;
fp.where('Runs','fiber_length','EQUALS', 10); % 1 2 3 5 6 8 10
fp.where('Runs','wavelength','EQUALS', lambda); %
fp.where('Runs','bitrate','EQUALS', 450e9);
fp.where('Runs','pam_level','EQUALS', 4);
fp.where('Runs','rop_attenuation','EQUALS', 0);
fp.where('Runs','is_mpi','EQUALS', 0);
fp.where('Runs', 'db_mode','EQUALS', 0);
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
[~, Symbols_preemph, S, ~] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
average_signals = 1;
if average_signals
Scpe_sig_avg = S{1};
scope_mean = zeros(size(S{1}.signal));
for n=1:numel(S)
scope_mean = scope_mean + S{n}.signal;
end
scope_mean = scope_mean ./ n;
Scpe_sig_avg.signal = scope_mean;
ScopeSignal_preemph = preprocessSignal(Scpe_sig_avg, Symbols_preemph, Symbols_preemph.fs,"gaussian_cutoff_factor",0.8);
else
ScopeSignal = S{1};
ScopeSignal_preemph = preprocessSignal(ScopeSignal, Symbols_preemph, Symbols_preemph.fs);
end
fignum = 2;
dn = sprintf("Rx Spectrum; %d nm",floor(lambda));
ScopeSignal_preemph.spectrum("displayname",dn,'fignum',fignum,'normalizeTo0dB',1,'fft_length',2^15,'show_onesided',1,'color',cols(idx,:));
[~, Symbols_preemph, Scpe_cell_preemph, ~] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
ScopeSignal = Scpe_cell_preemph{1};
ScopeSignal_preemph = preprocessSignal(ScopeSignal, Symbols_preemph, Symbols_preemph.fs);
if len == 10
fp.where('Runs', 'db_mode','EQUALS', 2);
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
[~, Symbols_db, S, found_sync] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
ScopeSignal = S{1};
average_signals = 1;
if average_signals
Scpe_sig_avg = S{1};
scope_mean = zeros(size(S{1}.signal));
for n=1:numel(S)
scope_mean = scope_mean + S{n}.signal;
end
scope_mean = scope_mean ./ n;
Scpe_sig_avg.signal = scope_mean;
ScopeSignal = preprocessSignal(Scpe_sig_avg, Symbols_preemph, Symbols_preemph.fs,"gaussian_cutoff_factor",0.8);
else
ScopeSignal = S{1};
ScopeSignal = preprocessSignal(ScopeSignal, Symbols_preemph, Symbols_preemph.fs);
end
ScopeSignal_DB = preprocessSignal(ScopeSignal, Symbols_db, Symbols_db.fs);
end
if len == 10
fignum = 2;
dn = sprintf("DBS Rx Spectrum; %d nm",floor(lambda));
ScopeSignal_DB.spectrum("displayname",dn,'fignum',fignum,'normalizeTo0dB',1,'fft_length',2^15,'show_onesided',1,'color',cols(idx+1,:));
% Symbols_db.spectrum("displayname",dn,'fignum',fignum,'normalizeTo0dB',1,'fft_length',1024,'show_onesided',1,'color',cols(idx+1,:));
end
% Fiber and system parameters
lambda0 = 1314e-9; % zero-dispersion wavelength [m]
lambda = lambda*1e-9; % operating wavelength [m]
S0 = 0.092; % dispersion slope [ps/(nm²·km)]
L = 10e3; % fiber length [m]
c = physconst('lightspeed');
% Derived quantities
S0_si = S0 * 1e3; % → s/m³
D_lambda = (S0/4) * (lambda*1e9 - (lambda0*1e9)^4/(lambda*1e9)^3); % ps/(nm·km)
D_si = D_lambda * 1e-6; % → s/m²
b2 = -D_si * lambda^2 / (2*pi*c); % s²/m
Dacc = D_lambda * L;
fprintf('Accumulated Dispersion: %.2f ps/nm \n', Dacc / 1e3);
% Frequency grid
f_max = 200e9;
f = linspace(0, f_max, 5000); % [Hz]
% IM/DD transfer function (power fading)
phi = 2*pi^2 * b2 * f.^2 * L;
H = abs(cos(phi));
% Plot
plot(f/1e9, 10*log10(H), 'LineWidth', 1,'Color','black','DisplayName','CD Transfer function','HandleVisibility','on');
grid on; box on;
xlabel('Frequency [GHz]');
ylabel('Magnitude [dB]');
% title(sprintf('IM/DD Power Fading: 10 km; 1275nm', lambda*1e9, L/1000),"Interpreter","latex");
% ylim([-20 0]);
idx = idx +1;
end
%% Load normal Signal w/o preemphasis
fp = QueryFilter();
fp.where('Runs','fiber_length','EQUALS', 10);
fp.where('Runs','wavelength','EQUALS', 1310);
fp.where('Runs','bitrate','EQUALS', 420e9);
fp.where('Runs','pam_level','EQUALS', 4);
fp.where('Runs','rop_attenuation','EQUALS', 0);
fp.where('Runs','is_mpi','EQUALS', 0);
fp.where('Runs', 'db_mode','EQUALS', 1);
fp.where('Runs', 'db_mode','EQUALS', 0);
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
[~, Symbols, Scpe_cell, ~] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
ScopeSignal = Scpe_cell{1};
ScopeSignal_no_preemph = preprocessSignal(ScopeSignal, Symbols, Symbols.fs);
fignum = len;
ScopeSignal_preemph.spectrum("displayname",'Full Response w/ preemphasis','fignum',fignum,'normalizeTo0dB',0,'color',clr.Paired.dgreen,'fft_length',4096*6);
%% Duobinary
fp = QueryFilter();
fp.where('Runs','fiber_length','EQUALS', 10);
fp.where('Runs','wavelength','EQUALS', 1310);
fp.where('Runs','bitrate','EQUALS', 420e9);
fp.where('Runs','pam_level','EQUALS', 4);
fp.where('Runs','rop_attenuation','EQUALS', 0);
fp.where('Runs','is_mpi','EQUALS', 0);
fp.where('Runs', 'db_mode','EQUALS', 2);
if len == 10
fp.where('Runs', 'db_mode','EQUALS', 2);
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
[~, Symbols_db, Scpe_cell_db, found_sync] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
ScopeSignal = Scpe_cell_db{1};
ScopeSignal_DB = preprocessSignal(ScopeSignal, Symbols_db, Symbols_db.fs);
end
fields = db.getTableFieldNames('Runs');
[dataTable, query] = db.queryDB(fp, fields);
if len == 10
fignum = 2;
dn = sprintf("DBS Rx Spectrum; %d nm",floor(lambda));
ScopeSignal_DB.spectrum("displayname",dn,'fignum',fignum,'normalizeTo0dB',1,'fft_length',2^15,'show_onesided',1,'color',cols(idx,:));
end
[~, Symbols_db, Scpe_cell_db, found_sync] = loadAndSyncRunSignals(dataTable(1,:), dsp_options);
ScopeSignal = Scpe_cell_db{1};
ScopeSignal_DB = preprocessSignal(ScopeSignal, Symbols_db, Symbols_db.fs);
%%
ScopeSignal_no_preemph.spectrum("displayname",'Full Response w/o preemphasis','fignum',2,'normalizeTo0dB',0,'color',clr.Paired.dblue);
ScopeSignal_preemph.spectrum("displayname",'Full Response w/ preemphasis','fignum',2,'normalizeTo0dB',0,'color',clr.Paired.dgreen);
ScopeSignal_DB.spectrum("displayname",'DB Response w/ preemphasis','fignum',2,'normalizeTo0dB',0,'color',clr.Paired.dorange);
%%