Revert "Merge branch 'main' of https://cau-git.rz.uni-kiel.de/nt/mitarbeiter/silas/imdd_simulation"
This reverts commit 798a0ca3b3
This commit is contained in:
Magnus Fischer
@@ -54,6 +54,12 @@ for k = 1:numel(fn)
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end
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json_str = jsonencode(eq_small);
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fn = fieldnames(eq_);
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for k = 1:numel(fn)
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if issparse(eq_.(fn{k}))
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eq_.(fn{k}) = full(eq_.(fn{k}));
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end
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end
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ml_mlse_results.config.eq = jsonencode(eq_);
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ml_mlse_results.config.equalizer_structure = int32(equalizer_structure.ml_mlse);
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ml_mlse_results.config.comment = 'function: ML-based MLSE';
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@@ -87,6 +93,7 @@ end
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function [bits, errors, ber, error_pos, errors_precoded, ber_precoded] = calculateBER(eq_signal_hd, tx_symbols, tx_bits, precode_mode, M, eth_style)
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% Calculate BER based on precoding mode
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mapper = PAMmapper(M, 0, "eth_style", eth_style);
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skip_front = 150;
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switch precode_mode
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case db_mode.no_db
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@@ -101,11 +108,11 @@ switch precode_mode
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tx_bits_precoded = mapper.demap(tx_symbols_precoded);
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rx_bits = mapper.demap(eq_signal_hd_precoded);
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[~, errors_precoded, ber_precoded, ~] = calc_ber(rx_bits.signal, tx_bits_precoded.signal, "skip_front", 30000, "skip_end", 150, "returnErrorLocation", 1);
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[~, errors_precoded, ber_precoded, ~] = calc_ber(rx_bits.signal, tx_bits_precoded.signal, "skip_front", skip_front, "skip_end", 150, "returnErrorLocation", 1);
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% B) Just determine BER
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rx_bits = mapper.demap(eq_signal_hd);
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[bits, errors, ber, error_pos] = calc_ber(rx_bits.signal, tx_bits.signal, "skip_front", 30000, "skip_end", 150, "returnErrorLocation", 1);
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[bits, errors, ber, error_pos] = calc_ber(rx_bits.signal, tx_bits.signal, "skip_front", skip_front, "skip_end", 150, "returnErrorLocation", 1);
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case db_mode.db_precoded
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% Data is precoded on TX side
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@@ -113,12 +120,12 @@ switch precode_mode
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eq_signal_hd_decoded = Duobinary().encode(eq_signal_hd, "M", M);
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eq_signal_hd_decoded = Duobinary().decode(eq_signal_hd_decoded, "M", M);
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rx_bits_decoded = mapper.demap(eq_signal_hd_decoded);
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[~, errors_precoded, ber_precoded, ~] = calc_ber(rx_bits_decoded.signal, tx_bits.signal, "skip_front", 30000, "skip_end", 150, "returnErrorLocation", 1);
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[~, errors_precoded, ber_precoded, ~] = calc_ber(rx_bits_decoded.signal, tx_bits.signal, "skip_front", skip_front, "skip_end", 150, "returnErrorLocation", 1);
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% B) Omit the Coding by comparing with demapped TX symbol sequence
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tx_bits_demapped = mapper.demap(tx_symbols);
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rx_bits = mapper.demap(eq_signal_hd);
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[bits, errors, ber, error_pos] = calc_ber(rx_bits.signal, tx_bits_demapped.signal, "skip_front", 30000, "skip_end", 150, "returnErrorLocation", 1);
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[bits, errors, ber, error_pos] = calc_ber(rx_bits.signal, tx_bits_demapped.signal, "skip_front", skip_front, "skip_end", 150, "returnErrorLocation", 1);
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end
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end
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@@ -1,219 +0,0 @@
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% Parameters
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c0 = physconst('lightspeed'); % [m/s]
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lambda0 = 1310e-9; % [m]
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omega0 = 2*pi*c0/lambda0;
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L = 5e-3; % [m] effective phase section length (set as needed)
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n_eff = 2.2; % [-] effective index (set as needed)
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E0 = 1; % field amplitude (arbitrary)
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Vpi = 3.2; % [V] half-wave voltage (your V_pi)
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% Drive
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f0 = 1e9; % [Hz]
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fs = 200e9; % [Hz]
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Nper = 2; % number of periods
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Vpp = 0.6*Vpi; % [V] peak-to-peak of v_drive(t)
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biasV = 1.1; % [V] differential bias added to v_drive
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% Time axis + differential drive voltage v_drive(t)
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T = Nper/f0;
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t = (0:1/fs:T-1/fs).';
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if 1
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% SINE
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v_drive = biasV + (Vpp/2)*sin(2*pi*f0*t); % v_drive(t) (peak = Vpp/2)
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else
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% --- Generate PAM-4 Sequence ---
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symbols = linspace(-0.5, 0.5, 4);
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num_symbols = 12; % Increased slightly for better visual
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rng(44);
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random_data = symbols(randi(4, 1, num_symbols));
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% Create time axis (Note: T is your period from the sine code)
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sps = round(T * fs);
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t = (0:1/fs:(num_symbols*T)-1/fs).';
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% Upsample to rectangular waveform
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v_pam = repelem(random_data, sps).';
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% Apply swing and bias: Resulting range is [biasV-Vpp/2, biasV+Vpp/2]
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v_drive_rect = biasV + (v_pam * Vpp);
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% --- Round the edges ---
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filter_span = round(sps/1.5); % Increased span for smoother "rounding"
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window = gausswin(filter_span);
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window = window / sum(window);
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% Apply filter (using 'same' to keep vector length, but be aware of edge transients)
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v_drive = conv(v_drive_rect, window, 'same');
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end
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% Analytic
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v_ = linspace(-1,2, 2001);
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% Field transfer function (amplitude)
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Field_mzm_analytic = cos((pi/2)*v_);
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% Power transfer function (intensity)
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P_mzm_analytic = Field_mzm_analytic.^2;
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% Imbalance factor in YOUR notation:
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rho = 1;
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% Push-pull branch voltages (consistent with v_drive = v1 - v2)
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v1 = +0.5*v_drive; % arm 1
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v2 = -0.5*v_drive; % arm 2
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% Phases phi1, phi2
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phi1 = pi * v1 / Vpi;
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phi2 = pi * v2 / Vpi;
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% Fields: E_in and E_out (exactly your Eq. (mzm_e_field))
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E_in = E0 .* exp(1i*omega0*t);
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common_phase = exp(-1i * (omega0*L*n_eff/c0)); % exp(-j*omega0*L*n_eff/c0)
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E_out = E0 .* exp(1i*omega0*t) .* common_phase .* 0.5 .* ...
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( exp(-1i*phi1) + rho .* exp(-1i*phi2) );
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% Transfer function (numerical): E_out/E_in
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H_num = E_out ./ E_in;
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% Power (normalized)
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Pnorm_num = abs(H_num).^2; % since |E_out/E_in|^2
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% Ideal TF (analytic) for comparison (rho=1, push-pull)
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H_ideal = common_phase .* cos( (pi/2) * (v_drive./Vpi) );
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Pnorm_ideal = abs(H_ideal).^2;
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Pnorm_math = cos( (pi/2) * (v_drive./Vpi) ).^2;
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set(groot, 'defaultLegendInterpreter', 'tex');
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set(groot, 'defaultAxesTickLabelInterpreter', 'tex');
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set(groot, 'defaultTextInterpreter', 'tex');
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% Normalized voltage axis (multiples of Vpi)
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v_norm = v_drive./Vpi;
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colfield = [0,0,0]; %is black
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colpow = linspecer(2);
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colpow = colpow(1,:);
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colvdrive = linspecer(2);
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colvdrive = colvdrive(2,:);
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%% SIGNAL IN
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figure(1); clf
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plot(v_norm,t*1e9, 'LineWidth', 1.0,'Color',colvdrive); grid on;
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ylabel('t [ns]'); xlabel('v_{drive}(t)/V_\pi');
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title('Drive voltage (normalized)');
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xlim([min(v_) max(v_)]);
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% mat2tikz_improved('C:\Users\Silas\Documents\6971e0b65b380ca6d71c837f\02_IMDD_System\tikz\linear_casee\mzm_input_signal.tex');
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%% IN/OUT (static transfer) — normalized x-axis + analytic curve
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if 0
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figure(2); clf
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plot(v_, Field_mzm_analytic, 'LineWidth', 1.2,'LineStyle','--','Color',colfield); hold on;% analytic power TF
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plot(v_, P_mzm_analytic, 'LineWidth', 1.2, 'Color',colpow); hold on;% analytic power TF
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% show input time signal
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plot(v_norm,-1+t*1e9, 'LineWidth', 1.0,'Color',colvdrive); grid on;
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% show output time signal
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plot(2+t*1e9, Pnorm_num, 'LineWidth', 1.0,'DisplayName','Intensity', 'Color',colvdrive); hold on;
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plot(2+t*1e9, real(H_ideal), '--', 'LineWidth', 1.0,'DisplayName','Field','Color',colfield); hold on;
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scatter(v_norm, Pnorm_num, 12, '.', 'LineWidth', 1,'MarkerEdgeColor',colvdrive);
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scatter(biasV./Vpi,(cos((pi/2)*biasV./Vpi)^2),10,'Marker','o');
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line([min(v_drive), min(v_drive)]./Vpi,[(cos((pi/2)*min(v_drive)./Vpi)^2), -2],'linewidth',0.5,'color','black','linestyle','--');
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line([max(v_drive) max(v_drive)]./Vpi,[(cos((pi/2)*max(v_drive)./Vpi)^2), -2],'linewidth',0.5,'color','black','linestyle','--');
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xline([min(v_norm) max(v_norm)])
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grid on;
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xlabel('v_{drive}(t)/V_\pi'); ylabel('|E_{out}/E_{in}|^2');
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% legend
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xlim([min(v_) max(v_)+1]);
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ylim([-1 1]);
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% mat2tikz_improved('C:\Users\Silas\Documents\6971e0b65b380ca6d71c837f\02_IMDD_System\tikz\mzm.tex');
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end
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%%
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figure(3); clf
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plot(v_, Field_mzm_analytic, 'LineWidth', 1.2,'LineStyle','--','Color',colfield); hold on;% analytic power TF
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plot(v_, P_mzm_analytic, 'LineWidth', 1.2, 'Color',colpow); hold on;% analytic power TF
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scatter(v_norm, Pnorm_num, 12, '.', 'LineWidth', 1,'MarkerEdgeColor',colvdrive);
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scatter(biasV./Vpi,(cos((pi/2)*biasV./Vpi)^2),10,'Marker','o');
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line([min(v_drive), min(v_drive)]./Vpi,[(cos((pi/2)*min(v_drive)./Vpi)^2), -2],'linewidth',0.5,'color','black','linestyle','--');
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line([max(v_drive) max(v_drive)]./Vpi,[(cos((pi/2)*max(v_drive)./Vpi)^2), -2],'linewidth',0.5,'color','black','linestyle','--');
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xline([min(v_norm) max(v_norm)])
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grid on;
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xlabel('v_{drive}(t)/V_\pi'); ylabel('|E_{out}/E_{in}|^2');
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% legend
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xlim([min(v_) max(v_)]);
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ylim([-1 1]);
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% mat2tikz_improved('C:\Users\Silas\Documents\6971e0b65b380ca6d71c837f\02_IMDD_System\tikz\mzm_tramsfer_function_matlab.tex');
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%%
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figure(4); clf
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% plot(v_, Field_mzm_analytic, 'LineWidth', 1.2,'LineStyle','--','Color',colfield); hold on;% analytic power TF
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plot(v_, P_mzm_analytic, 'LineWidth', 1.2, 'Color','black'); hold on;% analytic power TF
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input_dots = linspace(min(v_drive),max(v_drive),4)./Vpi;
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% input_dots = unique(v_drive_rect)./Vpi;
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output_dots = (cos((pi/2)*input_dots).^2);
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scatter(input_dots,output_dots,'Marker','x','LineWidth',1,'MarkerEdgeColor','black');
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scatter(input_dots,zeros(size(input_dots)),'Marker','^','LineWidth',2,'MarkerEdgeColor','black');
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% scatter(ones(size(input_dots)),output_dots,'Marker','<','LineWidth',2,'MarkerEdgeColor','black');
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for i = 1:numel(input_dots)
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% Draw the dashed projection lines
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line([input_dots(i), input_dots(i)], [output_dots(i), 0], 'linewidth', 0.5, 'color', 'black', 'linestyle', '--', 'handlevisibility', 'off');
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line([input_dots(i), 1], [output_dots(i), output_dots(i)], 'linewidth', 0.5, 'color', 'black', 'linestyle', '--', 'handlevisibility', 'off');
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% Add the level annotation boxes near the output (y-axis)
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% Adjust the '1.05' to move the box further right or 'output_dots(i)' for height
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j = 3-(i-1)*2;
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text(1, output_dots(i), sprintf('Level %d', j), ...
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'FontSize', 8, ...
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'EdgeColor', 'black', ...
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'BackgroundColor', 'white', ...
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'Margin', 2);
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end
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xlim([0,1.5]);
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ylim([0,1])
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% line([min(v_drive), min(v_drive)]./Vpi,[(cos((pi/2)*min(v_drive)./Vpi)^2), 0],'linewidth',0.5,'color','black','linestyle','--');
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% line([max(v_drive), max(v_drive)]./Vpi,[(cos((pi/2)*max(v_drive)./Vpi)^2), 0],'linewidth',0.5,'color','black','linestyle','--');
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% mat2tikz_improved('C:\Users\Silas\Documents\6971e0b65b380ca6d71c837f\02_IMDD_System\tikz\linear_casee\mzm_tf.tex');
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% xticks(sort(input_dots));
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% yticks(sort(output_dots));
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grid off
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%%
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% % FIELD TF (only field here; do not mix power into this figure)
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figure(5); clf
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% plot(t*1e9, real(H_num), 'LineWidth', 1.0); hold on;
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% plot(t*1e9, real(H_ideal), '--', 'LineWidth', 1.0,'DisplayName','Field','Color',colfield); hold on;
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plot(t*1e9, Pnorm_num, 'LineWidth', 1.0,'DisplayName','Intensity', 'Color',colpow); hold on;
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grid on;
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xlabel('t [ns]'); ylabel('Re\{E_{out}/E_{in}\}');
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legend
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yticks(sort(output_dots));
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% mat2tikz_improved('C:\Users\Silas\Documents\6971e0b65b380ca6d71c837f\02_IMDD_System\tikz\linear_casee\mzm_output_signal.tex');
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@@ -1,23 +0,0 @@
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function mat2tikz_improved(filename)
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arguments
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% Default to the path in your example if no argument is provided
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filename (1,1) string = 'C:\Users\Silas\Documents\Dissertation\00_Examples\tikz\textfig.tikz';
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end
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cleanfigure;
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matlab2tikz(char(filename), ...
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'width','\fwidth', ...
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'height','\fheight', ...
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'showInfo',false, ...
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'extraAxisOptions',{ ...
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'legend style={font=\footnotesize}', ...
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'xlabel style={font=\color{white!15!black},font=\small},',...
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'ylabel style={font=\color{white!15!black},font=\small},',...
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'legend columns=1', ...
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'every axis/.append style={font=\scriptsize}',...
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'legend columns=1',...
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'legend style={at={(0.02,0.98)},font=\footnotesize,draw=black!60,rounded corners=2pt,inner sep=1pt,fill=white,column sep=6pt,anchor= north west}',...
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'legend style={at={(0.02,0.98)},draw=white!0!white,font=\scriptsize,inner sep=0.1pt,fill=white,column sep=1pt,anchor= north west}',...
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'every axis/.append style={font=\scriptsize}',...
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});
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end
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Reference in New Issue
Block a user