updates of framework
- focus on AWG output power and lowpass characteristics
This commit is contained in:
Silas Oettinghaus
@@ -1,214 +1,236 @@
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%% Settings
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clear
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for M=[4,6,8]
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filename = '112G_2';
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load_sequence = 0;
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M = 6;
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datarate = 448e9;
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filename = '112G_2';
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load_sequence = 0;
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kover = 4;
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fsym = round(datarate*1e-9 / log2(M))*1e9;
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fdac = 256e9;
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fadc = 256e9;
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datarate = 448e9;
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lowpass_cutoff = fsym/2 * 1.1;
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awg_bw = lowpass_cutoff;
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mod_bw = lowpass_cutoff;
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phd_bw = lowpass_cutoff;
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scp_bw = lowpass_cutoff;
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kover = 8;
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fsym = round(datarate*1e-9 / log2(M))*1e9;
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fdac = 256e9;
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fadc = 256e9;
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LP_awg = Filter('filtdegree',4,"f_cutoff",90e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_modulator= Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_opt = Filter('filtdegree',3,"f_cutoff",fsym/log2(M).*1.5,"fs",fdac*kover,"filterType",filtertypes.gaussian);
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LP_phd = Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_scpe = Filter('filtdegree',4,"f_cutoff",110e9,"fs",fadc,"filterType",filtertypes.butterworth);
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lowpass_cutoff = fsym/2 * 1.1;
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awg_bw = lowpass_cutoff;
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mod_bw = lowpass_cutoff;
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phd_bw = lowpass_cutoff;
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scp_bw = lowpass_cutoff;
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LP_awg = Filter('filtdegree',4,"f_cutoff",90e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_modulator= Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_opt = Filter('filtdegree',3,"f_cutoff",fsym/log2(M).*1.5,"fs",fdac*kover,"filterType",filtertypes.gaussian);
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LP_phd = Filter('filtdegree',2,"f_cutoff",70e9,"fs",fdac*kover,"filterType",filtertypes.butterworth);
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LP_scpe = Filter('filtdegree',4,"f_cutoff",110e9,"fs",fadc,"filterType",filtertypes.butterworth);
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% 1) PRBS Generation
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O = 18; %order of prbs
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N = 2^(O-1); %length of prbs
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[~,seed] = prbs(O,1); %initialize first seed of prbs
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bitpattern=[];
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for i = 1:log2(M)
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[bitpattern(:,i),seed] = prbs(O,N,seed);
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end
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if M == 6
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bitpattern = reshape(bitpattern,[],1);
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bitpattern = bitpattern(1:end-mod(length(bitpattern),5));
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end
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% 2 ) Build Inf. signal class
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bits = Informationsignal(bitpattern);
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% 3) Digi modulation -> PAM-M signal
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digimod_out = PAMmapper(M,0).map(bits);
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digimod_out.fs = fsym;
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% linearGain = 1;
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% limit = 1;
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% SaturatingAmplifier = serdes.SaturatingAmplifier('Mode',1,...
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% 'Limit',limit,'LinearGain',linearGain);
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% X.signal = SaturatingAmplifier(X.signal);
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% X.signal = min(max(X.signal,-0.8),0.8);
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% X = X.normalize("mode","oneone");
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sir = [20:2:36]; %decibel = attenuation of interference path
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laser_linewidth = [1e5 1e6 10e6];
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pn_key = [1:10];
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vp = [0.25,0.5,0.75,1];
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vb = [1:0.1:1.8];
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rop = -5:5;
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sir = 28;
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laser_linewidth = 10e6;
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pn_key = 9;
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vp = 0.5;
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vb = 1;%[1:0.1:1.8];
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mpi_path=50;
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cnt = 1;
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for s = 1:length(sir)
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for l = 1:length(laser_linewidth)
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for pnk = 1:length(pn_key)
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for n = 1:length(vp)
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for m = 1:length(vb)
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%digimod_out = digimod_out.normalize("mode","oneone");
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% cnt = cnt+1;
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X = Pulseformer("fsym",fsym,"fdac",fdac,"pulse","rrc","pulselength",16,"rrcalpha",0.5).process(digimod_out);
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% 5) AWG (lowpass, quantization, sample and hold)
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X = AWG("fdac",fdac,"dac_min",-1,"dac_max",1,"H_lpf",LP_awg,"kover",kover,"bit_resolution",5,"lpf_active",1).process(X);
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% 6) Lowpass behavior before laser
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X = LP_modulator.process(X);
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% 7) Normalize signal
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X = X.normalize("mode","oneone");
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% 1) Laser; Modulation -> OPTICAL DOMAIN
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u_pi = 2;
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vbias = -vb(m);
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extmodlaser = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",X.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth(l),"randomkey",pn_key(pnk));
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E = X.*vp(n);
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[Opt,extmodlaser] = extmodlaser.process(E);
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% figure(m)
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% hold on
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% scatter(E.signal(1:100000),(abs(Opt.signal(1:100000)).^2)*1e3,0.1,'.','DisplayName','Modulator TF')
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% xlabel('Input in V')
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% ylabel('abs(Output) in mW')
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% ER = 10*log10(max(abs(Opt.signal).^2)/min(abs(Opt.signal).^2));
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Opt = LP_opt.process(Opt);
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cspr(s,l,pnk,n,m) = Opt.cspr;
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mod_out_pow(s,l,pnk,n,m) = Opt.power;
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% 2) ping pong fiber propagation
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Interference_sig = Fiber("fsimu",Opt.fs,"fiber_length",mpi_path*2/1000,"alpha",0,"D",0,"lambda0",1310,"gamma",0).process(Opt);
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Interference_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",-sir(s)).process(Interference_sig);
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% In the meantime: delay the main signal
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[Main_sig,dly] = Opt.delay("delay_meter",mpi_path*2);
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% Add
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Combined_sig = Main_sig + Interference_sig;
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% Cut (due to the delays there is a jump in the signals)
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if dly == 0;dly = 1;end
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Combined_sig.signal = Combined_sig.signal(ceil(dly):end);
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% Fiber
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Combined_sig = Fiber("fsimu",Combined_sig.fs,"fiber_length",2,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.08).process(Combined_sig);
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parfor i = 1:length(rop)
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% Set ROP
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Rx_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",rop(i)).process(Combined_sig);
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rop_save(s,l,pnk,n,m,i) = Rx_sig.power;
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% Square Law
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Rx_sig = Photodiode("fsimu",Rx_sig.fs,"dark_current",2e-08,"responsivity",1,"temperature",20).process(Rx_sig);
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%Lowpass PhDiode
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Rx_sig = LP_phd.process(Rx_sig);
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% Scope
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Scpe_sig = Scope("fsimu",Rx_sig.fs,"fadc",fadc,...
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"delay",0,"fixed_delay",0,"lpf_bw",scp_bw,"filtertype",filtertypes.butterworth,...
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"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
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"adcresolution",16,"quantbuffer",0.1,'block_dc',1,'lpf_active',1,'H_lpf',LP_scpe).process(Rx_sig);
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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",digimod_out,"fs_ref",fsym);
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% % % simple EQ (optimum mudc: 0.05 -> 0.005)
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% EQ_sig = EQ_silas_plain("Ne",[20,8,8],"Nb",[2,0,0],"trainlength",4096,"mu_dc_dd",0.005,"mu_dc_train",0.05,...
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% "mu_ffe_train",0.005,"mu_combined_dd",[0.0004 0.0006 0.0003 0.005],"ddloops",3,'trainloops',3,'sps',2).process(Rx_sig,digimod_out);
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% EQ_sig = EQ("K",2,"plottrain",0,"plotfinal",0,...
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% "training_length",4096,"training_loops",3,...
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% "Ne",[50,8,8],"Nb",[2,0,0],...
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% "DCmu",0.005,"DDmu",[0.0004 0.0006 0.0003 0.005],"DFEmu",0.005,"FFEmu",0.00,...
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% "dd_loops",3,"epsilon",[10 100 1000 ],"M",2,...
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% "thres",[0.005 0.004 0.0005 ],"l1act",0,"delay",0,"rho",0.0005,"ideal_dfe",0,"DB_aim",0).process(Scpe_sig,digimod_out);
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[EQ_sig,EQ_sym] = EQ_silas("Ne",[50,8,8],"Nb",[2,0,0],"trainlength",4096,...
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"sps",2,...
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"mu_dc_dd",0.00,...
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"mu_dc_train",0.0,...
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"mu_ffe_train",0.00,...
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"mu_dfe_train",0.005,...
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"mu_ffe_dd",[0.0004 0.0006 0.0003],...
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"mu_dfe_dd",0.005,...
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"ddloops",3,...
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"trainloops",3,...
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"eq_parallelization_blocklength",1, ...
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"eq_updatelatency",1,...
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"eq_avg_blocklength",0).process(Scpe_sig,digimod_out);
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% Demap
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% Rx_Bits = PAMmapper(M,0).demap(EQ_sig);
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Rx_Bits = PAMmapper(M,0).demap(EQ_sym);
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%
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% Rx_symboldecision = PAMmapper(M,0).decide_pamlevel(EQ_sig,"symbol_levels",unique(digimod_out.signal));
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%
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% levels = PAMmapper(M,0).separate_pamlevels(EQ_sig);
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% %levels = PAMmapper(M,0).separate_pamlevels(Rx_sig.resample("fs_in",Rx_sig.fs,"fs_out",fsym));
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%
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% level_avg(s,l,pnk,n,m,i,:) = mean(levels,'omitnan');
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% level_std(s,l,pnk,n,m,i,:) = std(levels,'omitnan');
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% BER
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[~,errors_bm,BER(s,l,pnk,n,m,i),errors] = calc_ber(Rx_Bits.signal,bitpattern,"skip_front",100,"skip_end",150,"returnErrorLocation",1);
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formatted_ber = sprintf('%.1e', BER(s,l,pnk,n,m,i));
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disp(['SIR: ',num2str(sir(s)),'; Lw:',num2str(laser_linewidth(l)),'; Key:',num2str(pn_key(pnk)),'; Vpeak: ',num2str(vp(n)),'; Vbias',num2str(vbias),'; BER: ',formatted_ber,'; run: ',num2str(cnt),' / 12961']);
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% plot_analysis_window;
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% drawnow;
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end
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end
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end
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save('pam4_level_comp');
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disp('saved_run2');
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end
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end
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end
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% BER plot
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figure(340)
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cols = linspecer(7);
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for m = 1:size(BER,1)
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hold on
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plot(rop,BER(m,:),'DisplayName',['Bias: ',num2str(vb(m)), ' V; PAM', num2str(M)],'LineStyle','--','Color',cols(M/2,:),'LineWidth',1,'Marker','square','MarkerEdgeColor',[1 1 1],'MarkerFaceColor',cols(M/2,:));
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end
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set(gca,'YScale','log');
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legend
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xlabel("ROP in dBm")
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yline(3.8e-3,'DisplayName','FEC');
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end
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figure(2)
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LP_awg.showHere;
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% LP_laser.showHere;
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% LP_opt.showHere;
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% LP_phd.showHere;
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% LP_scpe.showHere;
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% 1) PRBS Generation
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O = 18; %order of prbs
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N = 2^(O-1); %length of prbs
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[~,seed] = prbs(O,1); %initialize first seed of prbs
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bitpattern=[];
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for i = 1:log2(M)
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[bitpattern(:,i),seed] = prbs(O,N,seed);
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end
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if M == 6
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bitpattern = reshape(bitpattern,[],1);
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bitpattern = bitpattern(1:end-mod(length(bitpattern),5));
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end
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% 2 ) Build Inf. signal class
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bits = Informationsignal(bitpattern);
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% 3) Digi modulation -> PAM-M signal
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digimod_out = PAMmapper(M,0).map(bits);
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digimod_out.fs = fsym;
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X = Pulseformer("fsym",fsym,"fdac",fdac,"pulse","rrc","pulselength",16,"rrcalpha",0.1).process(digimod_out);
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% 5) AWG (lowpass, quantization, sample and hold)
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X = AWG("fdac",fdac,"dac_min",-1,"dac_max",1,"H_lpf",LP_awg,"kover",kover,"bit_resolution",5,"lpf_active",1).process(X);
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% 6) Lowpass behavior before laser
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X = LP_modulator.process(X);
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% 7) Normalize signal
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X = X.normalize("mode","oneone");
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% linearGain = 1;
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% limit = 1;
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% SaturatingAmplifier = serdes.SaturatingAmplifier('Mode',1,...
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% 'Limit',limit,'LinearGain',linearGain);
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% X.signal = SaturatingAmplifier(X.signal);
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% X.signal = min(max(X.signal,-0.8),0.8);
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% X = X.normalize("mode","oneone");
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sir = [20:2:36]; %decibel = attenuation of interference path
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laser_linewidth = [1e5 1e6 10e6];
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pn_key = [1:10];
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vp = [0.25,0.5,0.75,1];
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vb = [1:0.1:1.8];
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rop = -5:0;
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% sir = 35;
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% laser_linewidth = 1e6;
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% pn_key = 9;
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% vp = 0.5;
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% vb = [1:0.1:1.8];
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mpi_path=50;
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cnt = 1;
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for s = 1:length(sir)
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for l = 1:length(laser_linewidth)
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for pnk = 1:length(pn_key)
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for n = 1:length(vp)
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parfor m = 1:length(vb)
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% cnt = cnt+1;
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% 1) Laser; Modulation -> OPTICAL DOMAIN
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u_pi = 2;
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vbias = -vb(m);
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extmodlaser = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",X.fs,"lambda",1290,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth(l),"randomkey",pn_key(pnk));
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E = X.*vp(n);
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[Opt,extmodlaser] = extmodlaser.process(E);
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% figure(m)
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% hold on
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% scatter(E.signal(1:100000),(abs(Opt.signal(1:100000)).^2)*1e3,0.1,'.','DisplayName','Modulator TF')
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% xlabel('Input in V')
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% ylabel('abs(Output) in mW')
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% ER = 10*log10(max(abs(Opt.signal).^2)/min(abs(Opt.signal).^2));
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Opt = LP_opt.process(Opt);
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cspr(s,l,pnk,n,m) = Opt.cspr;
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mod_out_pow(s,l,pnk,n,m) = Opt.power;
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% 2) ping pong fiber propagation
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Interference_sig = Fiber("fsimu",Opt.fs,"fiber_length",mpi_path*2/1000,"alpha",0,"D",0,"lambda0",1310,"gamma",0).process(Opt);
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Interference_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",-sir(s)).process(Interference_sig);
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% In the meantime: delay the main signal
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[Main_sig,dly] = Opt.delay("delay_meter",mpi_path*2);
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% Add
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Combined_sig = Main_sig + Interference_sig;
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% Cut (due to the delays there is a jump in the signals)
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if dly == 0;dly = 1;end
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Combined_sig.signal = Combined_sig.signal(ceil(dly):end);
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% Fiber
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Combined_sig = Fiber("fsimu",Combined_sig.fs,"fiber_length",2,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.08).process(Combined_sig);
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for i = 1:length(rop)
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% Set ROP
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Rx_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",rop(i)).process(Combined_sig);
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rop_save(s,l,pnk,n,m,i) = Rx_sig.power;
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% Square Law
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Rx_sig = Photodiode("fsimu",Rx_sig.fs,"dark_current",2e-08,"responsivity",1,"temperature",20).process(Rx_sig);
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%Lowpass PhDiode
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Rx_sig = LP_phd.process(Rx_sig);
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% Scope
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Scpe_sig = Scope("fsimu",Rx_sig.fs,"fadc",fadc,...
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"delay",0,"fixed_delay",0,"lpf_bw",scp_bw,"filtertype",filtertypes.butterworth,...
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"samplingdelay",0,"rand_samplingdelay",0,"freq_offset",0,"samp_jitter",0,...
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"adcresolution",16,"quantbuffer",0.1,'block_dc',1,'lpf_active',1,'H_lpf',LP_scpe).process(Rx_sig);
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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",digimod_out,"fs_ref",fsym);
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% % % simple EQ (optimum mudc: 0.05 -> 0.005)
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||||
% EQ_sig = EQ_silas_plain("Ne",[20,8,8],"Nb",[2,0,0],"trainlength",4096,"mu_dc_dd",0.005,"mu_dc_train",0.05,...
|
||||
% "mu_ffe_train",0.005,"mu_combined_dd",[0.0004 0.0006 0.0003 0.005],"ddloops",3,'trainloops',3,'sps',2).process(Rx_sig,digimod_out);
|
||||
%
|
||||
% EQ_sig = EQ("K",2,"plottrain",0,"plotfinal",0,...
|
||||
% "training_length",4096,"training_loops",3,...
|
||||
% "Ne",[50,8,8],"Nb",[2,0,0],...
|
||||
% "DCmu",0.00,"DDmu",[0.0004 0.0006 0.0003 0.005],"DFEmu",0.005,"FFEmu",0.00,...
|
||||
% "dd_loops",3,"epsilon",[10 100 1000 ],"M",2,...
|
||||
% "thres",[0.005 0.004 0.0005 ],"l1act",0,"delay",0,"rho",0.0005,"ideal_dfe",0,"DB_aim",0).process(Scpe_sig,digimod_out);
|
||||
|
||||
EQ_sig = EQ_silas("Ne",[50,8,8],"Nb",[2,0,0],"trainlength",4096,...
|
||||
"sps",2,...
|
||||
"mu_dc_dd",0.00,...
|
||||
"mu_dc_train",0.00,...
|
||||
"mu_ffe_train",0.00,...
|
||||
"mu_dfe_train",0.005,...
|
||||
"mu_ffe_dd",[0.0004 0.0006 0.0003],...
|
||||
"mu_dfe_dd",0.005,...
|
||||
"ddloops",3,...
|
||||
"trainloops",3,...
|
||||
"eq_parallelization_blocklength",1, ...
|
||||
"eq_updatelatency",1,...
|
||||
"eq_avg_blocklength",0).process(Scpe_sig,digimod_out);
|
||||
|
||||
% Demap
|
||||
Rx_Bits = PAMmapper(M,0).demap(EQ_sig);
|
||||
%
|
||||
% Rx_symboldecision = PAMmapper(M,0).decide_pamlevel(EQ_sig,"symbol_levels",unique(digimod_out.signal));
|
||||
%
|
||||
% levels = PAMmapper(M,0).separate_pamlevels(EQ_sig);
|
||||
% %levels = PAMmapper(M,0).separate_pamlevels(Rx_sig.resample("fs_in",Rx_sig.fs,"fs_out",fsym));
|
||||
%
|
||||
% level_avg(s,l,pnk,n,m,i,:) = mean(levels,'omitnan');
|
||||
% level_std(s,l,pnk,n,m,i,:) = std(levels,'omitnan');
|
||||
|
||||
% BER
|
||||
[~,errors_bm,BER(s,l,pnk,n,m,i),errors] = calc_ber(Rx_Bits.signal,bitpattern,"skip_front",0,"skip_end",0,"returnErrorLocation",1);
|
||||
|
||||
formatted_ber = sprintf('%.1e', BER(s,l,pnk,n,m,i));
|
||||
disp(['SIR: ',num2str(sir(s)),'; Lw:',num2str(laser_linewidth(l)),'; Key:',num2str(pn_key(pnk)),'; Vpeak: ',num2str(vp(n)),'; Vbias',num2str(vbias),'; BER: ',formatted_ber,'; run: ',num2str(cnt),' / 12961']);
|
||||
|
||||
% plot_analysis_window;
|
||||
% drawnow;
|
||||
|
||||
end
|
||||
end
|
||||
end
|
||||
save('pam6_level_comp');
|
||||
disp('saved_run2');
|
||||
end
|
||||
end
|
||||
end
|
||||
LP_modulator.showHere;
|
||||
LP_opt.showHere;
|
||||
LP_phd.showHere;
|
||||
LP_scpe.showHere;
|
||||
|
||||
% figure('Name','spectrum')
|
||||
% tiledlayout(4,1)
|
||||
@@ -224,21 +246,9 @@ end
|
||||
|
||||
|
||||
% save(['C:\Users\Silas\Nextcloud4\Dokumente\02_Ablage_Office\MPI\Investigation_April_2024\','PAM_',num2str(M),'_mpi_',num2str(mpi_path),'_lw_',num2str(laser_linewidth)],"BER");
|
||||
%
|
||||
% % BER plot
|
||||
% figure(340)
|
||||
% cols = linspecer(7);
|
||||
% for m = 1:size(BER,1)
|
||||
% hold on
|
||||
% plot(rop,BER(m,:),'DisplayName',['Bias: ',num2str(vb(m)), ' V'],'LineStyle','-','Color',cols(m,:),'LineWidth',1,'Marker','o','MarkerEdgeColor',[1 1 1],'MarkerFaceColor',cols(m,:));
|
||||
%
|
||||
% end
|
||||
% set(gca,'YScale','log');
|
||||
% legend
|
||||
% xlabel("ROP in dBm")
|
||||
% yline(3.8e-3,'DisplayName','FEC');
|
||||
%
|
||||
%
|
||||
|
||||
%
|
||||
%
|
||||
% figure(21)
|
||||
% hold on
|
||||
% plot(rop,mean(BER),'DisplayName',['Modulation: ',num2str(2*vp/extmodlaser.u_pi*100), ' $\%$'],'LineStyle','-','Color',cols(2,:),'LineWidth',1);
|
||||
@@ -246,14 +256,14 @@ end
|
||||
% legend
|
||||
% ylabel("ROP in dBm")
|
||||
% yline(3.8e-3,'DisplayName','FEC');
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
%
|
||||
% %check Rx and TX symbols
|
||||
% figure(101)
|
||||
% scatter(1:100,Rx_symboldecision.signal(1:100),10,'o');
|
||||
|
||||
Reference in New Issue
Block a user