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This commit is contained in:
Silas Oettinghaus
2026-04-29 10:17:09 +02:00
parent 910486f536
commit 56b48095db
8 changed files with 142 additions and 84 deletions
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10
projects/Advanced_DSP_for_400G_IMDD_experiments/Auswertung_JLT/run_dsp_from_db.m
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@@ -2,7 +2,7 @@
dsp_options.append_to_db = 0;
dsp_options.max_occurences = 1;
experiment = "highspeed_2024";
experiment = "highspeed_2024";
dsp_options.mode = "load_run_id"; % 'simulate' & 'load_files'
dsp_options.load_file_path = struct();
@@ -11,10 +11,12 @@ if dsp_options.mode == "load_run_id"
if experiment == "highspeed_2024"
dsp_options.database_type = "mysql";
dsp_options.dataBase = 'labor_highspeed';%'C:\Users\Silas\Documents\MATLAB\Datensätze\sioe_labor\silas_labor_newdsp_newstructure.db';
dsp_options.storage_path = 'Z:\2024\sioe_labor\';
dsp_options.dataBase = 'labor_highspeed';%'C:\Users\Silas\Documents\MATLAB\Datensätze\sioe_labor\silas_labor_newdsp_newstructure.db';
dsp_options.storage_path = 'W:\labdata\sioe_labor\';
db = DBHandler("dataBase", [dsp_options.dataBase],...
"type", dsp_options.database_type,"server","134.245.243.254","user","silas","password","silas");
"type", dsp_options.database_type,...
"server","192.168.178.192",...% "server","134.245.243.254",...
"user","silas","password","silas");
elseif experiment == "mpi_ecoc_2025"

139
projects/Precoding_analysis/precode_imdd_system.m
View File

@@ -1,7 +1,7 @@
% minimal example IM/DD
M = 4;
fsym = 112e9;
fsym = 160e9;
apply_pulsef = 1;
fdac = 256e9;
@@ -50,21 +50,34 @@ mu_dc = 0.005;
mu_ffe = [mu_ffe1 mu_ffe3 mu_ffe3];
mu_dfe = 0.0004;
sf = signalform.prms;
Tx_bits = Signalgenerator( ...
"form", sf, ...
"M", M, ...
"order", 16).process();
Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"alpha",rcalpha);
Symbols = PAMmapper(M,0).map(Tx_bits);
Symbols.fs = fsym;
Symbols_plain = Symbols;
pr = Partialresponse("order", 1,"M",M);
Symbols = pr.precode(Symbols);
pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rc","pulselength",16,"alpha",rcalpha);
Digi_sig = pform.process(Symbols);
n = 10;
Digi_sig = Digi_sig.resample("fs_in",Digi_sig.fs,"fs_out",fdac,"n",n,"beta",5);
[Digi_sig,Symbols,Tx_bits] = PAMsource(...
"fsym",fsym,"M",M,"order",18,"useprbs",0,...
"fs_out",fdac,...
"applyclipping",0,"clipfactor",1.5,...
"applypulseform",apply_pulsef,"pulseformer",Pform,...
"randkey",random_key,...
'duobinary_mode',duob_mode,...
"mrds_code",0,"mrds_blocklength",512).process();
%%%%% AWG
% El_sig = M8199A("kover",kover).process(Digi_sig);
El_sig = AWG("fdac",fdac,"f_cutoff",fsym,"lpf_active",0,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",1).process(Digi_sig);
El_sig = M8199A("kover",kover).process(Digi_sig);
% El_sig = AWG("fdac",fdac,"f_cutoff",fsym*0.4,"lpf_active",1,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",1).process(Digi_sig);
tx_bwl = fsym*0.3;
El_sig = Filter('filtdegree',4,"f_cutoff",tx_bwl,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig);
El_sig.spectrum("displayname",'Digi Spectrum','fignum',1,'normalizeTo0dB',1);
xlim([0,130]);
ylim([-30,5]);
@@ -73,7 +86,7 @@ ylim([-30,5]);
%%%%% Electrical Driver Amplifier %%%%%%
% El_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",3).process(El_sig);
El_sig = El_sig.normalize("mode","oneone");
scaling = 0.6*(u_pi/2-abs(vbias-u_pi/2));
scaling = 0.8*(u_pi/2-abs(vbias-u_pi/2));
El_sig = El_sig .* scaling;
%%%%% MODULATE E/O CONVERSION %%%%%%
@@ -109,29 +122,63 @@ Scpe_sig = Scope("fsimu",fdac*kover,"fadc",fadc,...
% pulse is symmetric, hence we can use pulsef firectly as matched filter.
% It feels off (bit I think correct) that the fsym is now the output freq.!!
% -> output 2 sps to omit timing recovery!?
Pform = Pulseformer("fsym",fsym,"fdac",2*fsym,"pulse","rrc","pulselength",16,"alpha",rcalpha,"matched",1);
Scpe_sig = Pform.process(Scpe_sig);
Scpe_sig.spectrum("displayname",'Signal after matched filter','fignum',1,'normalizeTo0dB',1);
if 0
Pform = Pulseformer("fsym",fsym,"fdac",2*fsym,"pulse","rrc","pulselength",16,"alpha",rcalpha,"matched",1);
Scpe_sig = Pform.process(Scpe_sig);
end
% Scpe_sig.spectrum("displayname",'Signal after matched filter','fignum',1,'normalizeTo0dB',1);
%
% %%
% %%%%%% Sample to 2x fsym %%%%%%
% Scpe_sig = Scpe_sig.resample("fs_out",2*fsym);
% Scpe_sig.signal = Scpe_sig.signal(1:2*length(Symbols));
Scpe_sig = Scpe_sig.resample("fs_out",2*fsym);
Scpe_sig.signal = Scpe_sig.signal(1:2*length(Symbols));
%%
%%%%%% Sync Rx signal with reference %%%%%%
[Scpe_sig,~] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym,"debug_plots",1);
Scpe_sig.spectrum("displayname",'Opt Spectrum','fignum',11,'normalizeTo0dB',1);
[Scpe_sig,~] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym,"debug_plots",0);
% Scpe_sig.spectrum("displayname",'Opt Spectrum','fignum',11,'normalizeTo0dB',1);
% Scpe_sig = Filter('filtdegree',4,"f_cutoff",Symbols.fs.*0.5,"fs",Scpe_sig.fs,"filterType",filtertypes.gaussian,"active",true).process(Scpe_sig);
Scpe_sig = Scpe_sig - mean(Scpe_sig.signal);
Scpe_sig.signal = Scpe_sig.signal(1:2*length(Symbols));
%%
%% -------------------- MLSE --------------------
mlse_ = MLSE("DIR",[1,1],"duobinary_output",0,"M",M,'trellis_states',PAMmapper(M,0).levels);
ffe_order = [50, 2, 2];
eq_ = EQ("Ne",ffe_order,"Nb",[0,0,0],"training_length",len_tr,"training_loops",5,"dd_loops",5, ...
"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
% -------------------- FFE --------------------
%Duobinary Targeting
db_ref_sequence = Duobinary().encode(Symbols);
[eq_signal, eq_noise] = eq_.process(Scpe_sig,db_ref_sequence);
showLevelHistogram(eq_signal,db_ref_sequence)
[mlse_sig_sd,LLR,GMI_MLSE] = mlse_.process(eq_signal,Symbols);
Rx_bits = PAMmapper(M,0).demap(mlse_sig_sd);
Tx_bits_omitprecode = PAMmapper(M,0).demap(Symbols);
[bits,errors,ber_wo,errorIndice] = calc_ber(Rx_bits.signal,Tx_bits_omitprecode.signal);
fprintf(["BER w/o precode: %.2d \n"],ber_wo);
showErrorBurstCount(mlse_sig_sd, Symbols,"displayname",'MLSE DB w/o Precode','fignum',4); % prior to coding
%%
mlse_sig_sd = pr.encode(mlse_sig_sd);
mlse_sig_sd = pr.decode(mlse_sig_sd);
Rx_bits = PAMmapper(M,0).demap(mlse_sig_sd);
[bits,errors,ber,errorIndice] = calc_ber(Rx_bits.signal,Tx_bits.signal);
fprintf(["BER w/ precode: %.2d \n"],ber);
showErrorBurstCount(mlse_sig_sd, Symbols_plain,"displayname",'MLSE DB w/ Precode','fignum',5);
%% -------------------- FFE --------------------
ffe_order = [50, 0, 0];
eq_ = EQ("Ne",ffe_order,"Nb",[2,0,0], ...
"training_length",len_tr,"training_loops",5,"dd_loops",5, ...
@@ -139,44 +186,24 @@ eq_ = EQ("Ne",ffe_order,"Nb",[2,0,0], ...
"FFEmu",0,"plotfinal",0,"ideal_dfe",0);
% eq_ = FFE("epochs_tr",4,"epochs_dd",5,"len_tr",4096,"mu_dd",0.01,"mu_tr",0.01,"order",50,"sps",2,"decide",0, "adaption",adaption_method.nlms,"dd_mode",1);
eq_ = FFE_DFE("epochs_tr",5,"epochs_dd",5,"len_tr",512,"ffe_mu_dd",1e-4,"dfe_mu_dd",5e-4,"ffe_mu_tr",0,"dfe_mu_tr",0,"ffe_order",99,"dfe_order",99,"sps",2,"decide",0);
% eq_ = FFE_DFE("epochs_tr",5,"epochs_dd",5,"len_tr",512,"ffe_mu_dd",1e-4,"dfe_mu_dd",5e-4,"ffe_mu_tr",0,"dfe_mu_tr",0,"ffe_order",99,"dfe_order",99,"sps",2,"decide",0);
[eq_signal_sd, eq_noise] = eq_.process(Scpe_sig, Symbols);
output.ffe_results = ffe(eq_,M,Scpe_sig,Symbols,Tx_bits, ...
"precode_mode",duob_mode,'showAnalysis',1,"postFFE",[], ...
"eth_style_symbol_mapping",0);
eq_signal_hd = PAMmapper(M,0).quantize(eq_signal_sd);
output.ffe_results.metrics.print("description",'DFE');
Rx_bits = PAMmapper(M,0).demap(eq_signal_hd);
Tx_bits_omitprecode = PAMmapper(M,0).demap(Symbols);
[bits,errors,ber_wo,errorIndice] = calc_ber(Rx_bits.signal,Tx_bits_omitprecode.signal);
fprintf(["BER w/o precode: %.2d \n"],ber_wo);
%%
% -------------------- VNLE + MLSE --------------------
pf_ncoeffs = 1;
ffe_order3 = [50, 5, 5];
eq_v = EQ("Ne",ffe_order3,"Nb",dfe_order, ...
"training_length",len_tr,"training_loops",5,"dd_loops",5, ...
"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.005, ...
"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
pf_ = Postfilter("ncoeff",pf_ncoeffs,"useBurg",1);
mlse_ = MLSE("duobinary_output",0,'M',M,'trellis_states',PAMmapper(M,0).levels);
[output.vnle_results, output.mlse_results] = vnle_postfilter_mlse(eq_v, pf_, mlse_, M, Scpe_sig, Symbols, Tx_bits, ...
"precode_mode", duob_mode, 'showAnalysis', 1, "postFFE", [], "eth_style_symbol_mapping", 0);
output.mlse_results.metrics.print("description",'MLSE');
%%
% -------------------- DB target --------------------
mlse_db_ = MLSE("DIR",[1,1],"duobinary_output",0,"M",M,'trellis_states',PAMmapper(M,0).levels);
ffe_order = [50, 5, 5];
eq_ = EQ("Ne",ffe_order,"Nb",dfe_order,"training_length",len_tr,"training_loops",5,"dd_loops",5, ...
"K",2,"DCmu",mu_dc,"DDmu",[mu_ffe mu_dfe],"DFEmu",0.005,"FFEmu",0,"plotfinal",0,"ideal_dfe",1);
output.dbt_results = duobinary_target(eq_,mlse_db_, M, Scpe_sig, Symbols, Tx_bits, ...
"precode_mode", duob_mode, 'showAnalysis', 0, "postFFE", []);
output.dbt_results.metrics.print("description",'Duobinary');
showErrorBurstCount(eq_signal_hd, Symbols,"displayname",'No Precode','fignum',8); % prior to coding
eq_signal_hd = pr.encode(eq_signal_hd);
eq_signal_hd = pr.decode(eq_signal_hd);
Rx_bits = PAMmapper(M,0).demap(eq_signal_hd);
[bits,errors,ber,errorIndice] = calc_ber(Rx_bits.signal,Tx_bits.signal);
fprintf(["BER w/ precode: %.2d \n"],ber);
showErrorBurstCount(eq_signal_hd, Symbols_plain,"displayname",'Incl. Precode','fignum',7);