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Ordnerstruktur

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This commit is contained in:
Silas Oettinghaus
2026-04-23 16:16:58 +02:00
parent 8fd68c0a54
commit 456fd02186
13 changed files with 1117 additions and 194 deletions
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154
Classes/00_signals/Signal.m
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@@ -344,14 +344,16 @@ classdef Signal
obj
options.fignum = 2025
options.displayname = "";
options.color = [];
options.linestyle = '-';
options.normalizeToNyquist = 0;
options.addDCoffset = 0;
options.normalizeToDC = 0;
options.normalizeTo0dB = 0;
options.max_num_lines = []; % Leave empty or omit to disable line rotation
options.fft_length = [];
options.color = [];
options.linestyle = '-';
options.normalizeToNyquist = 0;
options.normalizeToSamplingRate = 0;
options.addDCoffset = 0;
options.normalizeToDC = 0;
options.normalizeTo0dB = 0;
options.show_onesided = false;
options.max_num_lines = []; % Leave empty or omit to disable line rotation
options.fft_length = [];
% --- NEW options ---
options.useWavelengthAxis (1,1) logical = false % plot x-axis in wavelength
options.lambda0_nm (1,1) double = 1310 % center wavelength [nm]
@@ -362,18 +364,21 @@ classdef Signal
end
if options.normalizeToNyquist == 0
[p_lin,f_Hz] = pwelch(obj.signal, hanning(options.fft_length), ...
options.fft_length/2, options.fft_length, ...
obj.fs, "centered", "power", "mean");
f_GHz = f_Hz*1e-9; % keep frequency vector for frequency axis
else
[p_lin,f_rad] = pwelch(obj.signal, hanning(options.fft_length), ...
options.fft_length/2, options.fft_length, ...
"centered", "power", "mean");
% In normalized mode, pwelch returns rad/sample centered on 0.
% We'll keep f_rad for the x-axis in that mode.
end
useSamplingRateAxis = options.normalizeToSamplingRate ~= 0;
useRadPerSampleAxis = options.normalizeToNyquist ~= 0 && ~useSamplingRateAxis;
if ~useRadPerSampleAxis && ~useSamplingRateAxis
[p_lin,f_Hz] = pwelch(obj.signal, hanning(options.fft_length), ...
options.fft_length/2, options.fft_length, ...
obj.fs, "centered", "power", "mean");
f_GHz = f_Hz*1e-9; % keep frequency vector for frequency axis
else
[p_lin,f_rad] = pwelch(obj.signal, hanning(options.fft_length), ...
options.fft_length/2, options.fft_length, ...
"centered", "power", "mean");
% In normalized modes, pwelch returns rad/sample centered on 0.
% Divide by 2*pi for the f/fs axis where Nyquist is 0.5.
end
% p_lin = movmean(p_lin,4);
@@ -387,45 +392,60 @@ classdef Signal
end
% --- If requested, build wavelength axis from frequency offset ---
if options.useWavelengthAxis && options.normalizeToNyquist == 0
c = physconst('LightSpeed'); % [m/s]
lambda0_m = options.lambda0_nm*1e-9; % center wavelength [m]
f_c = c / lambda0_m; % carrier frequency [Hz]
if options.useWavelengthAxis && ~useRadPerSampleAxis && ~useSamplingRateAxis
c = physconst('LightSpeed'); % [m/s]
lambda0_m = options.lambda0_nm*1e-9; % center wavelength [m]
f_c = c / lambda0_m; % carrier frequency [Hz]
% exact mapping
f_abs = f_c + f_Hz; % absolute frequency [Hz]
lambda_m = c ./ f_abs; % wavelength [m]
lambda_nm = lambda_m * 1e9; % wavelength [nm]
% assign axis
x_vec = lambda_nm(:);
x_label = "Wavelength [nm]";
% Sort to ensure axis is ascending
[x_vec, sortIdx] = sort(x_vec, 'ascend');
p_dbm = p_dbm(sortIdx, :);
else
% Frequency or normalized axes
if options.normalizeToNyquist == 0
x_vec = f_GHz;
x_label = "Frequency in GHz";
else
x_vec = f_rad; % normalized frequency in rad/sample
x_label = "Normalized Frequency";
end
end
figure(options.fignum);
ax = gca;
% assign axis
x_vec = lambda_nm(:);
x_label = "Wavelength [nm]";
dc_axis = f_Hz;
% Sort to ensure axis is ascending
[x_vec, sortIdx] = sort(x_vec, 'ascend');
p_dbm = p_dbm(sortIdx, :);
dc_axis = dc_axis(sortIdx);
else
% Frequency or normalized axes
if ~useRadPerSampleAxis && ~useSamplingRateAxis
x_vec = f_GHz;
x_label = "Frequency in GHz";
dc_axis = f_GHz;
elseif useSamplingRateAxis
x_vec = f_rad ./ (2*pi);
x_label = "Normalized Frequency f/fs";
dc_axis = x_vec;
else
x_vec = f_rad; % normalized frequency in rad/sample
x_label = "Normalized Frequency [rad/sample]";
dc_axis = x_vec;
end
end
if options.show_onesided
keep_idx = dc_axis >= 0;
x_vec = x_vec(keep_idx);
dc_axis = dc_axis(keep_idx);
p_dbm = p_dbm(keep_idx, :);
end
figure(options.fignum);
ax = gca;
hold on
p_dbm = p_dbm+options.addDCoffset;
if options.normalizeToDC
[~,min_idx]=min(abs(f_GHz));
pow_at_dc = p_dbm(min_idx);
p_dbm = p_dbm-pow_at_dc;
end
p_dbm = p_dbm+options.addDCoffset;
if options.normalizeToDC
[~,min_idx]=min(abs(dc_axis));
pow_at_dc = p_dbm(min_idx);
p_dbm = p_dbm-pow_at_dc;
end
% p_dbm = movmean(p_dbm,10);
for s = 1:min(size(p_dbm))
@@ -448,17 +468,27 @@ classdef Signal
% Axis labels and limits
xlabel(x_label);
if options.useWavelengthAxis && options.normalizeToNyquist == 0
xlim([min(x_vec) max(x_vec)]);
else
if options.normalizeToNyquist == 0
% Keep your existing freq handling (you can fine-tune as needed)
% xlim([-128 128]); % example for 256 GSa/s if desired
xlim([min(x_vec) max(x_vec)]);
else
xlim([-pi, pi]);
end
end
if options.useWavelengthAxis && ~useRadPerSampleAxis && ~useSamplingRateAxis
xlim([min(x_vec) max(x_vec)]);
else
if ~useRadPerSampleAxis && ~useSamplingRateAxis
% Keep your existing freq handling (you can fine-tune as needed)
% xlim([-128 128]); % example for 256 GSa/s if desired
xlim([min(x_vec) max(x_vec)]);
elseif useSamplingRateAxis
if options.show_onesided
xlim([0, 0.5]);
else
xlim([-0.5, 0.5]);
end
else
if options.show_onesided
xlim([0, pi]);
else
xlim([-pi, pi]);
end
end
end
ylabel(ylab);