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EQ Structures for MPI mitigation

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Silas
2024-08-15 09:40:59 +02:00
parent 34f9149346
commit 23f386da77
13 changed files with 880 additions and 135 deletions
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projects/MPI_August/mpi_uncorrelated.m
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@@ -2,25 +2,21 @@
%% Parameter to simulate and save
params = struct;
params.M = [4];
params.M = [8];
params.datarate = [224];
params.sir = [24]; %decibel = attenuation of interference path
params.laser_linewidth = [1e6];
params.pn_key = [11];
params.vbias_rel = [0.5];
params.rop = -5;
params.clipfactor = [1.5];
params.rrcalpha = [0.1];
params.sir = [30]; %decibel = attenuation of interference path
params.laser_linewidth = [1e6];
params.pn_key = [1];
params.rop = [-12:0];
name = ['wh_',strrep(num2str(now),'.','')];
wh = DataStorage(params);
wh.addStorage("ber");
wh.addStorage("rop");
wh.addStorage("txpapr");
wh.addStorage("er");
wh.addStorage("ber_ffe");
wh.addStorage("ber_dcavg");
wh.addStorage("ber_adapt");
wh.addStorage("ber_dcrem");
%% Init Params
link_length = 10000; %meter
@@ -32,7 +28,9 @@ disp(['Start Simulation of ',num2str(endcnt),' loops...'])
tic
for M = wh.parameter.M.values
for datarate = wh.parameter.datarate.values
for rrcalpha = wh.parameter.rrcalpha.values
for pn_key = wh.parameter.pn_key.values
%% SETUP HERE: %%
kover = 8;
@@ -44,157 +42,150 @@ for M = wh.parameter.M.values
% MAIN SIGNAL
%%%%% Symbol Generation %%%%%%
[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",0,"fs_out",M8199.fdac,"applyclipping",1,"clipfactor",1.3,"applypulseform",1,"pulseformer",Pform,"randkey",2).process();
[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",0,"fs_out",M8199.fdac,"applyclipping",1,"clipfactor",1.3,"applypulseform",1,"pulseformer",Pform,"randkey",pn_key).process();
%%%%% AWG %%%%%%
El_sig = M8199.process(Digi_sig);
El_sig = El_sig.*0.7222;
El_sig.signal = awgn(El_sig.signal,20,'measured',1);
El_sig.signal = awgn(El_sig.signal,20,'measured',pn_key);
%%%%% Lowpass before Modulator %%%%%%
El_sig = Filter('filtdegree',2,"f_cutoff",100e9,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig);
El_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",15).process(El_sig);
El_sig = Filter('filtdegree',2,"f_cutoff",60e9,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig);
El_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",10).process(El_sig);
% INTERFERENCE SIGNAL
%%%%% Symbol Generation %%%%%%
[Digi_sig_i,Symbols_i,Bits_i] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",0,"fs_out",M8199.fdac,"applyclipping",1,"clipfactor",1.3,"applypulseform",1,"pulseformer",Pform,"randkey",1).process();
[Digi_sig_i,Symbols_i,Bits_i] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",0,"fs_out",M8199.fdac,"applyclipping",1,"clipfactor",1.3,"applypulseform",1,"pulseformer",Pform,"randkey",pn_key*2).process();
%%%%% AWG %%%%%%
El_sig_i = M8199.process(Digi_sig_i);
El_sig_i = El_sig_i.*0.7222;
El_sig_i.signal = awgn(El_sig_i.signal,20,'measured',2);
El_sig_i.signal = awgn(El_sig_i.signal,20,'measured',pn_key*2);
%%%%% Lowpass before Modulator %%%%%%
El_sig_i = Filter('filtdegree',2,"f_cutoff",100e9,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig_i);
El_sig_i = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",15).process(El_sig_i);
El_sig_i = Filter('filtdegree',2,"f_cutoff",60e9,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig_i);
El_sig_i = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",10).process(El_sig_i);
for laser_linewidth = wh.parameter.laser_linewidth.values
for pn_key = wh.parameter.pn_key.values
for vbias_rel = wh.parameter.vbias_rel.values
% MAIN SIGNAL
%%%%% MODULATE E/O CONVERSION %%%%%%
vbias_rel = 0.5;
u_pi = 2.9;
vbias = -vbias_rel*u_pi;
[Opt_sig] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",pn_key).process(El_sig);
Optfilter = Filter('filtdegree',6,"f_cutoff",fsym.*0.7,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true);
Opt_sig = Optfilter.process(Opt_sig);
er = Opt_sig.extinctionratio(fsym,M);
% INTERFERENCE SIGNAL
%%%%% MODULATE E/O CONVERSION %%%%%%
u_pi = 2.9;
vbias = -vbias_rel*u_pi;
[Opt_sig_i] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",pn_key+1).process(El_sig_i);
Opt_sig_i = Optfilter.process(Opt_sig_i);
% MAIN SIGNAL
%%%%% MODULATE E/O CONVERSION %%%%%%
u_pi = 2.9;
vbias = -vbias_rel*u_pi;
[Opt_sig] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",pn_key).process(El_sig);
Optfilter = Filter('filtdegree',6,"f_cutoff",fsym.*0.7,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true);
Opt_sig = Optfilter.process(Opt_sig);
j_ = wh.parameter.sir.length;
i_ = wh.parameter.rop.length;
ber=zeros(j_,i_);
patten=zeros(j_,i_);
for j = 1:j_
sir = wh.parameter.sir.values(j);
% INTERFERENCE SIGNAL
%%%%% MODULATE E/O CONVERSION %%%%%%
u_pi = 2.9;
vbias = -vbias_rel*u_pi;
[Opt_sig_i] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",pn_key+1).process(El_sig_i);
Opt_sig_i = Optfilter.process(Opt_sig_i);
%%%%% Interference Signal Fiber Prop %%%%%%
Opt_sig_i = Fiber("fsimu",Opt_sig_i.fs,"fiber_length",link_length/1000,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig_i);
Opt_sig_i = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",Opt_sig.power-sir).process(Opt_sig_i);
%%%%% ADD Interference and Main Signal %%%%%%
Opt_sig = Opt_sig_i + Opt_sig;
%%%%% Interference Signal Fiber Prop %%%%%%
Opt_sig = Fiber("fsimu",Opt_sig.fs,"fiber_length",link_length/1000,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig);
% % MPI Channel
% Opt = channel_model_mpi(Opt_sig,link_length,mpi_path,sir);
j_ = wh.parameter.sir.length;
i_ = wh.parameter.rop.length;
ber=zeros(j_,i_);
patten=zeros(j_,i_);
% Receiver ROP curve
parfor i = 1:i_
rop=wh.parameter.rop.values(i);
for j = 1:j_
sir = wh.parameter.sir.values(j);
% Set ROP
Rx_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",rop).process(Opt_sig);
patten(j,i) = Rx_sig.power;
%%%%%% Square Law %%%%%%
Rx_sig = Photodiode("fsimu",fdac*kover,"dark_current",2e-08,"responsivity",1,"temperature",20).process(Rx_sig);
%%%%%% Lowpass PhDiode %%%%%%
Rx_sig = Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true).process(Rx_sig);
% Rx_sig.spectrum("displayname","Received Signal after PhD","fignum",201);
%%%%% Interference Signal Fiber Prop %%%%%%
Opt_sig_i = Fiber("fsimu",Opt_sig_i.fs,"fiber_length",link_length/1000,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig_i);
%%%%%% Scope %%%%%%
fadc = 256e9;
Lp_scpe = Filter('filtdegree',4,"f_cutoff",63e9,"fs",fadc,"filterType",filtertypes.butterworth,"active",true);
Scpe_sig = Scope("fsimu",fdac*kover,"fadc",fadc,...
"delay",0,"fixed_delay",0,"filtertype",filtertypes.butterworth,...
"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
"adcresolution",16,"quantbuffer",0.1,'block_dc',1,'lpf_active',1,'H_lpf',Lp_scpe).process(Rx_sig);
%%%%%% Sample to 2x fsym %%%%%%
Scpe_sig = Scpe_sig.resample("fs_in",fadc,"fs_out",2*fsym);
Opt_sig_i = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",Opt_sig.power-sir).process(Opt_sig_i);
%%%%%% Sync Rx signal with reference %%%%%%
[Scpe_sig,D,cuts] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);
%%%%% ADD Interference and Main Signal %%%%%%
Opt_sig = Opt_sig_i + Opt_sig;
%%%%% EQUALIZE %%%%%%
Eq = FFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",25,"sps",2,"decide",1);
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber_ffe(j,i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['BER: ',sprintf('%.1E',ber_ffe(j,i)),' - - ROP: ',num2str(patten(j,i)),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
%%%%% Interference Signal Fiber Prop %%%%%%
Opt_sig = Fiber("fsimu",Opt_sig.fs,"fiber_length",link_length/1000,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig);
Eq = FFE_FFDCAVG("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",25,"sps",2,"decide",1,"mu_buff",0.7);
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber_dcavg(j,i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['BER: ',sprintf('%.1E',ber_dcavg(j,i)),' - - ROP: ',num2str(patten(j,i)),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
Eq = FFE_adaptive_decision("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",25,"sps",2,"decide",1,"buffer_length",85); [EQ_sig] = Eq.process(Scpe_sig,Symbols);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber_adapt(j,i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['BER: ',sprintf('%.1E',ber_adapt(j,i)),' - - ROP: ',num2str(patten(j,i)),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
% % MPI Channel
% Opt = channel_model_mpi(Opt_sig,link_length,mpi_path,sir);
% Receiver ROP curve
for i = 1:i_
rop=wh.parameter.rop.values(i);
% Set ROP
Rx_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",rop).process(Opt_sig);
patten(j,i) = Rx_sig.power;
%%%%%% Square Law %%%%%%
Rx_sig = Photodiode("fsimu",fdac*kover,"dark_current",2e-08,"responsivity",1,"temperature",20).process(Rx_sig);
%%%%%% Lowpass PhDiode %%%%%%
Rx_sig = Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true).process(Rx_sig);
% Rx_sig.spectrum("displayname","Received Signal after PhD","fignum",201);
%%%%%% Scope %%%%%%
fadc = 256e9;
Lp_scpe = Filter('filtdegree',4,"f_cutoff",63e9,"fs",fadc,"filterType",filtertypes.butterworth,"active",true);
Scpe_sig = Scope("fsimu",fdac*kover,"fadc",fadc,...
"delay",0,"fixed_delay",0,"filtertype",filtertypes.butterworth,...
"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
"adcresolution",16,"quantbuffer",0.1,'block_dc',1,'lpf_active',1,'H_lpf',Lp_scpe).process(Rx_sig);
Scpe_sig.plot("displayname","SIgnal after Scope","fignum",999);
%%%%%% Sample to 2x fsym %%%%%%
Scpe_sig = Scpe_sig.resample("fs_in",fadc,"fs_out",2*fsym);
%%%%%% Sync Rx signal with reference %%%%%%
[Scpe_sig,D,cuts] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);
%%%%% EQUALIZE %%%%%%
% Eq = FFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",25,"sps",2,"decide",0);
% Eq = FFE_DFE("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"ffe_mu_dd",1e-4,"dfe_mu_dd",5e-4,"ffe_mu_tr",0,"dfe_mu_tr",0,"ffe_order",25,"dfe_order",2,"sps",2,"decide",1);
% Eq = EQ("Ne",[25,3,3],"Nb",[0,0,0],"training_length",4096,"training_loops",4,"dd_loops",4,"K",2,"DCmu",0,"DDmu",[0.0004 0.0004 0.0004 0.0004 ],"DFEmu",0.005,"FFEmu",0,"plotfinal",1);
Eq = VNLE("epochs_tr",7,"epochs_dd",7,"len_tr",4096,"mu_dd",[0.0004 0.0005 0.0006],"mu_tr",0,"order",[25,3,3],"sps",2,"decide",0);
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
% EQ_sig.normalize("mode","rms").plot('fignum',23,'displayname','before eq')
%%%%% DEMAP %%%%%%
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
%%%% Look at Pam levels %%%%%
if 1
a = PAMmapper(M,0).separate_pamlevels(EQ_sig);
figure(14);hold on;scatter(1:EQ_sig.length,a,1,'.');
end
% BER
[~,errors_bm,ber(j,i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
cnt = cnt+1;
disp(['BER: ',sprintf('%.1E',ber(j,i)),' - - ROP: ',num2str(Rx_sig.power),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
end
end
for j = 1:j_
sir = wh.parameter.sir.values(j);
for i = 1:i_
rop=wh.parameter.rop.values(i);
wh.addValueToStorage(ber(j,i),'ber',M,datarate,sir,laser_linewidth,pn_key,vbias_rel,rop,clipfactor,rrcalpha);
wh.addValueToStorage(patten(j,i),'rop',M,datarate,sir,laser_linewidth,pn_key,vbias_rel,rop,clipfactor,rrcalpha);
wh.addValueToStorage(er,'er',M,datarate,sir,laser_linewidth,pn_key,vbias_rel,rop,clipfactor,rrcalpha);
end
end
Eq = FFE_DCremoval("epochs_tr",5,"epochs_dd",5,"len_tr",4096*2,"mu_dd",1e-4,"mu_tr",0,"order",25,"sps",2,"decide",1,"mu_dc",0.07);
[EQ_sig] = Eq.process(Scpe_sig,Symbols);
Rx_bits = PAMmapper(M,0).demap(EQ_sig);
[~,errors_bm,ber_dcrem(j,i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
disp(['BER: ',sprintf('%.1E',ber_dcrem(j,i)),' - - ROP: ',num2str(patten(j,i)),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
end
toc
disp(['Simulated: ',num2str(cnt/endcnt*100),' %']);
save(['C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\MPI_Juni\',name,'.mat'],"wh");
end
for j = 1:j_
sir = wh.parameter.sir.values(j);
for i = 1:i_
rop=wh.parameter.rop.values(i);
wh.addValueToStorage(ber_ffe(j,i) ,'ber_ffe',M,datarate,sir,laser_linewidth,pn_key,rop);
wh.addValueToStorage(ber_dcavg(j,i),'ber_dcavg',M,datarate,sir,laser_linewidth,pn_key,rop);
wh.addValueToStorage(ber_adapt(j,i),'ber_adapt',M,datarate,sir,laser_linewidth,pn_key,rop);
wh.addValueToStorage(ber_dcrem(j,i),'ber_dcrem',M,datarate,sir,laser_linewidth,pn_key,rop);
end
end
toc
disp(['Simulated: ',num2str(cnt/endcnt*100),' %']);
save(['C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\MPI_Juni\',name,'.mat'],"wh");
end
end
end
@@ -202,5 +193,43 @@ end
M = wh.parameter.M.values(1);
datarate = wh.parameter.datarate.values(1);
sir = wh.parameter.sir.values(1);
laser_linewidth = wh.parameter.laser_linewidth.values(1);
pn_key = wh.parameter.pn_key.values;
rop = wh.parameter.rop.values;
cols = linspecer(4);
cnt = 0;
for pnk = pn_key
cnt = cnt+1;
ber_ffe = wh.getStoValue('ber_ffe',M,datarate,sir,laser_linewidth,pnk,rop);
ber_dcavg = wh.getStoValue('ber_dcavg',M,datarate,sir,laser_linewidth,pnk,rop);
ber_adapt = wh.getStoValue('ber_adapt',M,datarate,sir,laser_linewidth,pnk,rop);
ber_derem = wh.getStoValue('ber_dcrem',M,datarate,sir,laser_linewidth,pnk,rop);
% Create the initial plot
figure(43);
hold on; % Retain the plot so new points can be added without complete redraw
plot(rop,ber_ffe',"LineWidth",1,"LineStyle",":","Marker",".","MarkerSize",10,"DisplayName","ber ffe",'Color',cols(1,:));
plot(rop,ber_dcavg',"LineWidth",1,"LineStyle",":","Marker",".","MarkerSize",10,"DisplayName","ber dcavg",'Color',cols(2,:));
plot(rop,ber_adapt',"LineWidth",1,"LineStyle",":","Marker",".","MarkerSize",10,"DisplayName","ber adapt",'Color',cols(3,:));
plot(rop,ber_derem',"LineWidth",1,"LineStyle",":","Marker",".","MarkerSize",10,"DisplayName","ber derem",'Color',cols(4,:));
end
yline(3.8e-3,'DisplayName','HD-FEC');
xlabel('Signal to Interference Ratio (dB)');
ylabel('Bit Error Rate (BER)');
title('Bit Error Rate vs. SIR (MPI)');
set(gca,'yscale','log');
grid on;
legend