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imdd_silas/projects/Lab_2024/lab_db_precode.m
Silas Labor Zizou bf94e3dc2f Work on lab PC 
- many new automations
- scripts to record and save MPI and bias optimizations...
2024-10-15 08:43:34 +02:00

247 lines
8.9 KiB
Matlab
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folderpath = 'C:\Users\sioe\Nextcloud\Dokumente\02_Ablage_Office\Lab_Data_24\no_mpi_2024\';
experiment_name = '10km_ffe_no_mpi_';
only_dsp = 0;
ffe_only = 1;
postfilter_approach = 0;
db_channel_approach = 0;
db_coding_approach = 0;
db_precode = db_coding_approach || db_channel_approach;
%%% SIR Sweep for MPI Experiment %%%
params = struct;
params.i_atten = [40];
wh = DataStorage(params);
wh.addStorage("ber");
wh.addStorage("sir");
wh.addStorage("pd_in");
wh.addStorage("signals");
precomp_mode = 2; %0=do nothing ; 1= measure; 2=precomp active
precomp_amp_max = 3;
M = 6;
pn_key = 2;
usemrds = 0;
fdac = 92e9;
fsym = 56e9;
fadc = 160e9;
rrcalpha = 0.05;
v_bias = 2.25;
i_atten = params.i_atten(1);
pd_in_desired = 6;
disp(['Start Measurement of ',num2str(prod(wh.dim)),' loops...'])
for i = 1
%%%%% SET Volatges %%%%%%
dcs = DC_supply("active",[1,1],"voltage",[v_bias, 9]);
dcs.set("voltage",[v_bias, 9]);
voa = OptAtten("active",[1,2,1,1],"value",[0,pd_in_desired,0,i_atten],"wavelength",[1310,1310,1310,1310]);
%voa.set('active',[1,2,1,1],'value',[0,pd_in_desired,0,i_atten]);
% voa.readvals();
SCP = ScopeKeysight("model","DSAZ634A",'autoscale',1,"fadc",'GSa_160',"channel",[1,0],"recordLen",2000000,"removeDC",1);
AWG = AwgKeysight("model","M8196A","fdac",fdac,"scaletodac",[1,1,1,1],"skews",[0,0,0,0],"voltages",[0,0,0,0.62]);
A2S = Awg2Scope(AWG,SCP,[0,0,0,1]);
if 1
precomp_path = "C:\Users\sioe\Documents\MATLAB\imdd_simulation\projects\standard_system\";
precomp_fn = "lab_mpi_setup_2";
else
precomp_path = "C:\Users\sioe\Documents\MATLAB\model-collection\sioe_models\Labor_2024\Lab_PAM4\";
precomp_fn = "precomp_bla__loop1_1";
end
%%%%% Symbol Generation %%%%%%
Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rrcalpha);
[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",1,...
"fs_out",fdac,"applyclipping",0,"clipfactor",1.7,...
"applypulseform",0,"pulseformer",Pform,"randkey",pn_key,...
"db_precode",db_precode,...
"mrds_code",usemrds,"mrds_blocklength",512,"db_encode",db_coding_approach).process();
if precomp_mode == 1 % measure channel
freqresp = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',Digi_sig.fs);
Digi_sig = freqresp.buildOFDM();
elseif precomp_mode == 2 % apply precomp
freqresp = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',Digi_sig.fs);
Digi_sig = freqresp.precomp(Digi_sig,'maxampdb',precomp_amp_max,'loadPath',precomp_path,'fileName',precomp_fn);
end
Digi_sig = Digi_sig.resample("fs_out",AWG.fdac);
Digi_sig.spectrum("displayname","Normal Tx","fignum",10);
save([folderpath,[experiment_name,'bits']],"Bits");
save([folderpath,[experiment_name,'symbols']],"Symbols");
for i_atten = wh.parameter.i_atten.values
%%%%% SET ATTENUATOR %%%%%%
voa.set('active',[1,2,1,1],'value',[0,7,0,i_atten]);
%%%%% AWG --> Scope %%%%%%
[~,~,~,Scpe_sig] = A2S.process("signal4",Digi_sig);
Scpe_sig.spectrum("displayname","Scope PSD","fignum",20);
% Scpe_sig.spectrum("displayname",'Rx Signal','fignum',10);
%%%%%% Sample to 2x fsym %%%%%%
Scpe_sig = Scpe_sig.resample("fs_in",160e9,"fs_out",2*fsym);
if precomp_mode == 1
freqresp.estimate(Scpe_sig,"save",true,"savePath",precomp_path,"fileName",precomp_fn);
freqresp.plot();
end
%%%%%% Sync Rx signal with reference %%%%%%
[Scpe_sig,S] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);
save([folderpath,experiment_name,'rx_signal_iatten_',num2str(i_atten),''],"S");
average_signals = 0;
if average_signals
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.signal = scope_mean;
end
Scpe_sig.plot("displayname","Scope PSD","fignum",30);
Scpe_sig.eye(fsym,M,"fignum",40,"displayname",' after Scope');
sir = voa.power_state(3)-voa.power_state(4);
pd_in = voa.power_state(2);
%%%%% EQUALIZE %%%%%%
Eq = FFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",50,"sps",2,"decide",0);
Eq = VNLE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",[0.0004 0.0005 0.0006],"mu_tr",0,"order",[50,7,7],"sps",2,"decide",1);
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);
if ffe_only %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
EQ_sig.plot("fignum",50,"displayname",'After EQ');
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),'| SIR: ',num2str(sir),' dB | PD_in: ',num2str(pd_in),' dBm']);
elseif postfilter_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[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 0
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
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),' | SIR: ',num2str(sir),' dB | PD_in: ',num2str(pd_in),' dBm']);
elseif db_channel_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig, Noi] = Eq.process(Scpe_sig,Duobinary().encode(Symbols));
EQ_sig.plot("fignum",50,"displayname",'After EQ','clear',1);
EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
EQ_sig = Duobinary().decode(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([' DB Precode -> Channel -> FFE -> Decode/ Mod ',sprintf('%.1E',ber),' | SIR: ',num2str(sir),' dB | PD_in: ',num2str(pd_in),' dBm']);
elseif db_coding_approach %%%%%%%%%%%%%%%%%%%%%%%%%%%
[EQ_sig, Noi] = Eq.process(Scpe_sig,Symbols);
EQ_sig = MLSE("DIR",[1,1],"duobinary_output",1,"M",M,"trellis_states",PAMmapper(M,0).levels).process(EQ_sig);
EQ_sig = Duobinary().decode(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);
EQ_sig.plot("fignum",50,"displayname",'After EQ');
disp([' DB Precode -> DB Code -> Channel -> FFE -> Decode/ Mod ',sprintf('%.1E',ber),' | SIR: ',num2str(sir),' dB | PD_in: ',num2str(pd_in),' dBm']);
end
wh.addValueToStorage(ber,'ber',i_atten);
wh.addValueToStorage(sir,'sir',i_atten);
wh.addValueToStorage(pd_in,'pd_in',i_atten);
wh.addValueToStorage(Rx_bits,'signals',i_atten);
end
end
wh.save([folderpath,experiment_name,'_wh']);
cols = linspecer(8);
sir_vals = wh.parameter.i_atten.values;
bers = wh.getStoValue('ber',sir_vals);
figure(90);
a = gca;
hold on; % Retain the plot so new points can be added without complete redraw
plot(sir_vals,bers,"LineWidth",0.5,"LineStyle","-","Marker",".","MarkerSize",15,"DisplayName",[experiment_name]);
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('Interpreter','none')
autoArrangeFigures(2,3,2)
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