Scattered stuff from Silas during Dissertation
This commit is contained in:
Silas Oettinghaus
@@ -3,11 +3,11 @@ function [output] = imdd_model(varargin)
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simulation_mode = 1;
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%%% Change folder
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curFolder = pwd;
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funcFolder=fileparts(mfilename('fullpath'));
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if ~isempty(funcFolder)
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cd(funcFolder);
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end
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% curFolder = pwd;
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% funcFolder=fileparts(mfilename('fullpath'));
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% if ~isempty(funcFolder)
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% cd(funcFolder);
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% end
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%%% Run parameters
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% TX
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@@ -16,8 +16,8 @@ fsym = 150e9;
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bitrate = [];
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apply_pulsef = 0;
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fdac = 4*fsym;%256e9;
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fadc = 4*fsym;%256e9;
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fdac = 256e9;
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fadc = 256e9;
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random_key = 1;
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rcalpha = 0.05;
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@@ -29,7 +29,7 @@ vbias = -vbias_rel*u_pi;
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laser_wavelength = 1293;
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laser_linewidth = 0;
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tx_bw_nyquist = 0.65;
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tx_bw_nyquist = 0.65;
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% Channel
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link_length = 1;
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@@ -112,18 +112,26 @@ end
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f_nyquist = fsym/2;
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Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rc","pulselength",16,"alpha",rcalpha);
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[Digi_sig,Symbols,Tx_bits] = PAMsource(...
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"fsym",fsym,"M",M,"order",16,"useprbs",0,...
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"fs_out",fdac,...
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"applyclipping",0,"clipfactor",1.5,...
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"applypulseform",apply_pulsef,"pulseformer",Pform,...
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"randkey",random_key,...
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'duobinary_mode',duob_mode,...
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"mrds_code",0,"mrds_blocklength",512).process();
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%%%%% START SIMULATION
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Digi_sig.spectrum("displayname",'Digi Spectrum','fignum',10,'normalizeTo0dB',1);
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measure_tf = 0;
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if measure_tf
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freqresp = ChannelFreqResp("Nacq",1024,"Navg",64,"Ncp",70,"f_ref",fadc);
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Digi_sig = freqresp.buildOFDM();
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else
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Pform = Pulseformer("fsym",fsym,"fdac",4*fsym,"pulse","rc","pulselength",16,"alpha",rcalpha);
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[Digi_sig,Symbols,Tx_bits] = PAMsource(...
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"fsym",fsym,"M",M,"order",18,"useprbs",0,...
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"fs_out",fdac,...
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"applyclipping",0,"clipfactor",1.5,...
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"applypulseform",apply_pulsef,"pulseformer",Pform,...
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"randkey",random_key,...
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'duobinary_mode',duob_mode,...
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"mrds_code",0,"mrds_blocklength",512).process();
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end
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% Digi_sig.spectrum("displayname",'Digi Spectrum','fignum',10,'normalizeTo0dB',1);
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channel_mode = lower(string(channel_mode));
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@@ -131,26 +139,35 @@ switch channel_mode
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case "physical"
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%%%%% AWG
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% El_sig = M8199A("kover",kover).process(Digi_sig);
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El_sig = AWG("fdac",fdac,"f_cutoff",fsym,"lpf_active",1,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",0).process(Digi_sig);
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El_sig = M8199B("kover",kover).process(Digi_sig);
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% El_sig = AWG("fdac",fdac,"f_cutoff",fsym,"lpf_active",1,"kover",kover,"bit_resolution",12,"upsampling_method","samplehold","precomp_sinc_rolloff",0,"H_lpf",H_awg).process(Digi_sig);
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% El_sig.spectrum("displayname",'Digi Spectrum','fignum',100,'normalizeTo0dB',0);
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% El_sig = El_sig.setPower(0,"dBm");
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%%%%% Low-pass el. components %%%%%%
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tx_bwl = tx_bw_nyquist.*f_nyquist;
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% tx_bwl = 80e9;
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El_sig = Filter('filtdegree',4,"f_cutoff",tx_bwl,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(El_sig);
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% tx_bwl = tx_bw_nyquist.*f_nyquist;
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tx_bwl = 85e9;
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El_sig = Filter('filtdegree',4,"f_cutoff",tx_bwl,"fs",fdac*kover,"filterType",filtertypes.bessel_inp,"active",true).process(El_sig);
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% El_sig.spectrum("displayname",'Digi Spectrum','fignum',100,'normalizeTo0dB',1);
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%%%%% Electrical Driver Amplifier %%%%%%
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% El_sig = Amplifier("amp_mode","ideal_no_noise","gain_mode","gain","amplification_db",3).process(El_sig);
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El_sig = El_sig.normalize("mode","oneone");
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scaling = 0.6*(u_pi/2-abs(vbias-u_pi/2));
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scaling = 0.7*(u_pi/2-abs(vbias-u_pi/2));
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El_sig = El_sig .* scaling;
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%%%%% MODULATE E/O CONVERSION %%%%%%
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[Opt_sig] = EML("mode",eml_mode.im_cosinus,"power",3,"fsimu",El_sig.fs,"lambda",laser_wavelength,"bias",vbias,"u_pi",u_pi,"linewidth",laser_linewidth,"randomkey",random_key+1,"alpha",eml_alpha).process(El_sig);
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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 u_pi]);
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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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% Opt_sig.spectrum("displayname",'Opt Spectrum','fignum',10,'normalizeTo0dB',1);
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Opt_sig = Fiber("fsimu",Opt_sig.fs,"fiber_length",link_length,"alpha",0.3,"D",0,"lambda0",1310,"gamma",0,"Dslope",0.07).process(Opt_sig);
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@@ -161,14 +178,14 @@ switch channel_mode
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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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%%%%%% Low-pass RX (PD, El. Connectors and Scope %%%%%%
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rx_bwl = rx_bw_nyquist.*f_nyquist;
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% rx_bwl = 80e9;
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% rx_bwl = rx_bw_nyquist.*f_nyquist;
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rx_bwl = 90e9;
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Rx_sig = Filter('filtdegree',4,"f_cutoff",rx_bwl,"fs",fdac*kover,"filterType",filtertypes.butterworth,"active",true).process(Rx_sig);
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% %%%%%% Low-pass Scope %%%%%%
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Lp_scpe = Filter('filtdegree',4,"f_cutoff",110e9,"fs",fadc,"filterType",filtertypes.butterworth,"active",true);
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% Rx_sig.spectrum("displayname",'Analog Rx Spectrum','fignum',100,'normalizeTo0dB',1);
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% Rx_sig.spectrum("displayname",'Analog Rx Spectrum','fignum',10,'normalizeTo0dB',1);
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%%%%%% Scope %%%%%%
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Rx_sig = Scope("fsimu",fdac*kover,"fadc",fadc,...
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@@ -193,6 +210,15 @@ switch channel_mode
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error('Unknown channel_mode "%s". Supported: physical, awgn, awgn_alphaD.', channel_mode);
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end
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if measure_tf
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Rx_sig = Rx_sig.resample("fs_out",freqresp.f_ref);
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freqresp.estimate(Rx_sig,"fileName",'','save',false);
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freqresp.plot()
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return;
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end
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Rx_sig.spectrum("displayname",'Sampled Rx Spectrum','fignum',1996,'normalizeTo0dB',1);
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txPulseformer = [];
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if apply_pulsef
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txPulseformer = Pform;
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@@ -205,7 +231,7 @@ dspParameters.mu_dfe = mu_dfe;
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dspParameters.mu_dc = mu_dc;
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dspParameters.use_ffe = 1;
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dspParameters.use_dfe = 0;
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dspParameters.use_vnle_mlse = 1;
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dspParameters.use_vnle_mlse = 0;
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dspParameters.use_dbtgt = 0;
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dspParameters.use_dbenc = 0;
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dspParameters.use_ml_mlse = 0;
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@@ -213,9 +239,9 @@ dspParameters.pf_ncoeffs = pf_ncoeffs;
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dspParameters.ffe_order_ffe = [50, 0, 0];
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dspParameters.ffe_order_dfe = [50, 0, 0];
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dspParameters.dfe_feedback_order = [2, 0, 0];
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dspParameters.ffe_order_vnle = [200, 0, 0];
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dspParameters.ffe_order_vnle = [50, 4, 4];
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dspParameters.dfe_order_vnle = dfe_order;
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dspParameters.ffe_order_dbtgt = [50, 0, 0];
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dspParameters.ffe_order_dbtgt = [50, 4, 4];
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dspParameters.dfe_order_dbtgt = dfe_order;
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dspParameters.decoding_mode = decoding_mode;
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