New MPI mitigation schemes // Duobinary // Start of FTN schemes
This commit is contained in:
Silas Oettinghaus
197
projects/standard_system/imdd_minimal_2.m
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197
projects/standard_system/imdd_minimal_2.m
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%% Parameter to simulate and save
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params = struct;
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params.M = [4];
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params.datarate = [440];
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params.rop = [0];
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precomp_mode = 2; %0=do nothing ; 1= measure; 2=precomp active
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precomp_path = "C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\standard_system\";
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precomp_fn = "400G_simulative_setup";
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usemrds = 0;
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name = ['wh_',strrep(num2str(now),'.','')];
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wh = DataStorage(params);
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wh.addStorage("ber_ffe");
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%% Init Params
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link_length = 0; %meter
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pn_key = 2;
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laser_linewidth = 0;
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endcnt = prod(wh.dim);
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cnt=0;
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disp(['Start Simulation of ',num2str(endcnt),' loops...'])
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tic
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for M = wh.parameter.M.values
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for datarate = wh.parameter.datarate.values
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% SETUP HERE: %%
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kover = 16;
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M8199 = M8199B("kover",kover);
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fdac = M8199.fdac;
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fsym = round(datarate / log2(M)) * 1e9;
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rrcalpha = 0.05;
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Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rrc","pulselength",16,"rrcalpha",rrcalpha);
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% MAIN SIGNAL
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%%%%% Symbol Generation %%%%%%
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[Digi_sig,Symbols,Bits] = PAMsource("fsym",fsym,"M",M,"order",18,"useprbs",0,...
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"fs_out",M8199.fdac,"applyclipping",1,"clipfactor",1.7,...
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"applypulseform",0,"pulseformer",Pform,"randkey",pn_key,...
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"db_precode",1,...
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"mrds_code",usemrds,"mrds_blocklength",512).process();
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Digi_sig.eye(fsym,M);
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Digi_sig.spectrum("fignum",11,"displayname",'before precomp');
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if precomp_mode == 1
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freqresp = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",63,'f_ref',Digi_sig.fs);
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Digi_sig = freqresp.buildOFDM();
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elseif precomp_mode == 2
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Digi_sig = freqresp.precomp(Digi_sig,'maxampdb',3,'loadPath',precomp_path,'fileName',precomp_fn);
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Digi_sig.spectrum("fignum",11,"displayname",'after precomp');
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end
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%%%%% AWG %%%%%%
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El_sig = M8199.process(Digi_sig);
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% El_sig.signal = awgn(El_sig.signal,-3,'measured',pn_key);
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%%%%% Lowpass el. components %%%%%%
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El_sig = Filter('filtdegree',2,"f_cutoff",60e9,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig);
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%%%%% Electrical Driver Amplifier %%%%%%
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El_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",9).process(El_sig);
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% El_sig = El_sig.setPower(6,"dBm");
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fprintf('Driver output power: %s dBm\n', num2str(El_sig.power));
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fprintf('Driver output peak voltage: %s Vpp \n', num2str(max(El_sig.signal)-min(El_sig.signal)));
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% MAIN SIGNAL
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%%%%% MODULATE E/O CONVERSION %%%%%%
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vbias_rel = 0.5;
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u_pi = 2.9;
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vbias = -vbias_rel*u_pi;
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[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);
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% Opt_sig.eye(fsym,M);
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% %
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% figure(10)
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% hold on
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% scatter(El_sig.signal(1:100000)+vbias,(abs(Opt_sig.signal(1:100000)).^2)*1e3,0.1,'.','DisplayName','Modulator TF')
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% ylim([0 4]);
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% xlim([-u_pi/2, u_pi/2]+vbias);
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% xlabel('Input in V')
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% ylabel('abs(Output) in mW')
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Optfilter = Filter('filtdegree',6,"f_cutoff",fsym.*0.7,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true);
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Opt_sig = Optfilter.process(Opt_sig);
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Opt_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",0).process(Opt_sig);
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i_ = wh.parameter.rop.length;
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ber_ffe=zeros(i_);
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patten=zeros(i_);
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%%%%% Interference Signal Fiber Prop %%%%%%
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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);
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% Receiver ROP curve
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for i = 1:i_
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rop=wh.parameter.rop.values(i);
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% Set ROP
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Rx_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","output_power","amplification_db",rop).process(Opt_sig);
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patten(i) = Rx_sig.power;
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%%%%%% Square Law %%%%%%
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Rx_sig = Photodiode("fsimu",fdac*kover,"dark_current",2e-08,"responsivity",1,"temperature",20,"nep",1.8e-11).process(Rx_sig);
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%%%%%% Lowpass PhDiode %%%%%%
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Rx_sig = Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.gaussian,"active",true).process(Rx_sig);
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%%%%%% Scope %%%%%%
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fadc = 256e9;
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Lp_scpe = Filter('filtdegree',4,"f_cutoff",100e9,"fs",fadc,"filterType",filtertypes.butterworth,"active",true);
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Scpe_sig = Scope("fsimu",fdac*kover,"fadc",fadc,...
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"delay",0,"fixed_delay",0,"filtertype",filtertypes.butterworth,...
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"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
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"adcresolution",10,"quantbuffer",0.1,'block_dc',1,'lpf_active',1,'H_lpf',Lp_scpe).process(Rx_sig);
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if precomp_mode == 1
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freqresp.estimate(Scpe_sig,"save",true,"savePath",precomp_path,"fileName",precomp_fn);
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freqresp.plot();
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end
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%%%%%% Sample to 2x fsym %%%%%%
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Scpe_sig = Scpe_sig.resample("fs_in",fadc,"fs_out",2*fsym);
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%%%%%% Sync Rx signal with reference %%%%%%
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[Scpe_sig,D,cuts] = Scpe_sig.tsynch("reference",Symbols,"fs_ref",fsym);
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%%%%% EQUALIZE %%%%%%
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%
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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);
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%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);
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[EQ_sig] = Eq.process(Scpe_sig,Symbols);
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Rx_bits = PAMmapper(M,0).demap(EQ_sig);
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[~,errors_bm,ber_ffe(i),errors] = calc_ber(Rx_bits.signal,Bits.signal,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
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disp(['BER: ',sprintf('%.1E',ber_ffe(i)),' - - ROP: ',num2str(patten(i)),'dBm - - PAM-',num2str(M),' - - ',num2str(fsym*1e-9),' GBd']);
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end
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for i = 1:i_
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rop=wh.parameter.rop.values(i);
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wh.addValueToStorage(ber_ffe(i) ,'ber_ffe',M,datarate,rop);
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end
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toc
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disp(['Simulated: ',num2str(cnt/endcnt*100),' %']);
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wh.save('C:\Users\Silas\Documents\MATLAB\imdd_simulation\projects\MPI_August\auswertung\')
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end
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end
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cols = linspecer(8);
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%cnt = cnt+1;
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ber_ffe = wh.getStoValue('ber_ffe',M,datarate,wh.parameter.rop.values);
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% Create the initial plot
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figure(44);
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a = gca;
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hold on; % Retain the plot so new points can be added without complete redraw
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plot(wh.parameter.rop.values,ber_ffe,"LineWidth",0.5,"LineStyle","-","Marker",".","MarkerSize",15,"DisplayName","FFE only");
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yline(3.8e-3,'DisplayName','HD-FEC','LineStyle','--','HandleVisibility','off');
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xlabel('Received Optical Power (dBm)');
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ylabel('Bit Error Rate (BER)');
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title('Bit Error Rate vs. ROP');
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set(gca,'yscale','log');
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set(gca,'Box','on');
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grid on;
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grid minor
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legend
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