MPI Simulations and stuff
This commit is contained in:
Silas Oettinghaus
@@ -5,14 +5,21 @@ classdef Signal
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properties
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signal
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logbook
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fs
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end
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methods
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function obj = Signal(signal)
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function obj = Signal(signal,options)
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%SIGNAL Construct an instance of this class
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% Detailed explanation goes here
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arguments
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signal
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options.fs = [];
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end
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obj.signal = signal;
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obj.signal = obj.signal;
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obj.fs = options.fs;
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SignalType = [];
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TimeStamp = [];
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@@ -114,6 +121,64 @@ classdef Signal
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end
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function plot(obj, options)
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% signal to plot: obj.signal
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% fsamp : obj.fs (e.g. 92e9 => 92 GHz)
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% length: length(obj.signal)
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arguments
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obj
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options.fignum
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options.displayname = [];
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options.timeframe = 0;
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end
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figure(options.fignum); % If figure does not exist, create new figure
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% 2) Plot into the figure handle found or created in one
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t = (0:length(obj.signal)-1) / obj.fs; % time vector
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if options.timeframe ~= 0
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%only show a certain timeframe of signal
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t = t(t<options.timeframe);
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end
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% 2 a) Actual plot (hold on, displayname??)
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dn = options.displayname;
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if isa(obj,'Opticalsignal')
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sig = abs(obj.signal).^2;
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else
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sig = obj.signal;
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end
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hold on;
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plot(t, sig(1:length(t)), 'DisplayName', dn, 'LineWidth', 0.1, 'Marker', '.', 'LineStyle','none', 'MarkerSize', 0.1);
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% 2 c)
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% - xlabel if not already here: time in readable format (1 ms and not 1e-3 s)
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% - ylabel amplitude
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if isempty(get(gca, 'XLabel').String)
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xlabel('Time (mu s)');
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end
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if isempty(get(gca, 'YLabel').String)
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ylabel('Amplitude');
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end
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% Convert time axis to milliseconds for readability
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xticks = get(gca, 'XTick');
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set(gca, 'XTick', xticks, 'XTickLabel', xticks * 1e6);
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% Add legend if not already present
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if isempty(get(gca, 'Legend'))
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legend;
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end
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hold off;
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end
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%% Add signals from one signal to another, the first object will sustain
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function Sum = plus(X,y)
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@@ -126,9 +191,9 @@ classdef Signal
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end
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end
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function Product = times(X,y)
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if isa(y,'Signal')
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Product = X;
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Product.signal = X.signal .* y.signal;
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@@ -138,7 +203,6 @@ classdef Signal
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end
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end
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%% Display length
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function return_length = length(obj)
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@@ -162,7 +226,7 @@ classdef Signal
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SignalPower = [obj.power];
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Nase = [0];
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cell = {SignalType , TimeStamp , Length , SignalPower , Nase, Description};
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cell = {SignalType , TimeStamp , Length , SignalPower(1) , Nase, Description};
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obj.logbook = [obj.logbook;cell];
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@@ -175,9 +239,11 @@ classdef Signal
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obj Signal
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options.fs_in double
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options.fs_out double
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options.n double = 10;
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options.beta double = 5;
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end
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obj.signal = resample(obj.signal,options.fs_out,options.fs_in);
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obj.signal = resample(obj.signal,options.fs_out,options.fs_in,options.n,options.beta);
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desc = ['resample signal from ', num2str(options.fs_in*1e-9), ' GHz to ', num2str(options.fs_out*1e-9), ' GHz' ];
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@@ -188,108 +254,110 @@ classdef Signal
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end
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%%
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function spectrum(obj,fsamp,options)
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function spectrum(obj,options)
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arguments
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obj
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fsamp
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options.figurename = [];
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options.displayname = [];
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options.fignum
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options.displayname = "";
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end
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%Get figure if there is already a spectrum plot -> I want to add the new
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%spectum "onto" the existing plot to have a better comparison
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if isempty(options.figurename)
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fig = findall(groot, 'Type', 'figure', 'Name', 'power density');
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if isvalid(fig)
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fig = get(fig);
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ax = gca;
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hold on
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else
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figure('name','power density');
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ax = gca;
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end
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else
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fig = findall(groot, 'Type', 'figure', 'Name', options.figurename);
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if isvalid(fig)
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ax = fig.CurrentAxes;
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hold on
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else
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figure('name',options.figurename);
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ax = gca;
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hold on
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end
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end
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% spectrum_plot(obj.signal,options.fsamp,options.figurename,options.displayname);
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N = 2^(nextpow2(length(obj.signal))-6);
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[p_lin,w] = pwelch(obj.signal,hanning(N),N/2,N,obj.fs,"centered","power","mean");
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p_dbm = 10*log10(p_lin)+30; %dB to dBm in case of "power"
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%compute FFT of input
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Fsignal = fft(obj.signal);
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%POWER spectral density (todo: toggle?)
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psd = Fsignal.*conj(Fsignal);
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%Use only magnitude of FFT (which was complex)
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psd = abs(psd);
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%Shift the spectrum to yield
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psd = fftshift(psd);
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%divide by N
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psd = psd/length(Fsignal);
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%smoothing
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psd = smooth(psd,1000);
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psd_plot = 20*log10(psd);
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psd_plot(psd_plot<-120) = -120;
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testParseval = 1;
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if testParseval == 1
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E_FreqDomain = sum(psd);
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%test parseval
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E_TimeDomain = sum(abs(Fsignal.^2));
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if isequal(round(E_FreqDomain,1),round(E_TimeDomain,1))
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%disp('Parseval is right!');
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else
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disp('Parseval theorem is not right...');
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end
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end
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if fsamp <= 1e+100
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%Frequency Axis
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freq_vec = linspace(-fsamp/2,fsamp/2,length(psd));
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freq_vec = reshape(freq_vec,size(psd_plot));
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if ~isempty(options.displayname)
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plot(freq_vec*1e-9,psd_plot,'Linewidth',0.5,'DisplayName',options.displayname,'Parent',ax);
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else
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plot(freq_vec*1e-9,psd_plot,'Linewidth',0.5,'Parent',ax);
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end
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xlabel('Frequency [GHz]')
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else
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%Wavelength Axis
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freq_vec = physconst('LightSpeed')*linspace(-fsamp/2,fsamp/2,length(psd))./((physconst('LightSpeed')/1550e-9)^2);
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if ~isempty(options.displayname)
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plot(freq_vec*1e9,psd_plot,'Linewidth',0.5,'DisplayName',options.displayname,'Parent',ax);
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else
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plot(freq_vec*1e9,psd_plot,'Linewidth',0.5,'Parent',ax);
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end
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xlabel('Wavelength [nm]')
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end
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ylabel('Magnitude [dB]')
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figure(options.fignum); % If figure does not exist, create new figure
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hold on
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plot(w.*1e-9,p_dbm,'DisplayName',options.displayname,'LineWidth',1);
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xlabel("Frequency in GHz");
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%ylabel("Power/frequency (dB/Hz)");
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ylabel("Power (dBm)");
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xlim([-obj.fs/2 obj.fs/2].*1e-9)
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edgetick = 2^(nextpow2(obj.fs*1e-9));
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xticks([-edgetick:16:edgetick]);
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xlim([-244, 244])
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ylim([-120,-0]);
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yticks([-200:10:10]);
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legend
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grid minor;
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end
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%% Power of signal
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function pow = power(obj,options)
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arguments
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obj
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options.unit power_notation = power_notation.dBm
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end
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pow = mean(abs(obj.signal).^2);
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switch options.unit
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case power_notation.dBm
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if isa(obj,'Electricalsignal')
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pow = pow / 50;
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end
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pow = 10*log10(pow)+30; %dbm
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case power_notation.mW
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pow = pow .* 1e3; %mW
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case power_notation.W
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%pow = pow % Watt
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end
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end
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%% Peak Power of Signal
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function pow_pk = power_peak(obj,options)
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arguments
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obj
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options.unit power_notation = power_notation.dBm
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end
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pow_pk = max(abs(obj.signal).^2); % dBm
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switch options.unit
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case power_notation.dBm
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pow_pk = pow2db(pow_pk)+30; %dbm
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case power_notation.mW
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pow_pk = pow_pk .* 1e3; %mW
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case power_notation.W
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%pow = pow % Watt
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end
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end
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%% PAPR of signal
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function papr = papr_lin(obj)
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%PAPR The peak-to-average power ratio (PAPR) is the peak amplitude squared (giving the peak power)
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% divided by the RMS value squared (giving the average power).[1] It is the square of the crest factor.
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% papr = max(abs(timesignal))^2 / rms(timesignal)^2; ODER papr = peak2rms(sig)^2;
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papr = obj.power_peak("unit",power_notation.W) / obj.power("unit",power_notation.W); %linear
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end
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%% PAPR of signal
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function papr_db = papr_db(obj)
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%PAPR The peak-to-average power ratio (PAPR) is the peak amplitude squared (giving the peak power)
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% divided by the RMS value squared (giving the average power).[1] It is the square of the crest factor.
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% papr = max(abs(timesignal))^2 / rms(timesignal)^2; ODER papr = peak2rms(sig)^2;
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papr = obj.power_peak("unit",power_notation.W) / obj.power("unit",power_notation.W);
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papr_db = 10*log10(papr);
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average_power = obj.power;
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peak_power = obj.power_peak;
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papr_db = peak_power - average_power; %db
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end
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%%
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function obj = normalize(obj,options)
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@@ -366,33 +434,310 @@ classdef Signal
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end
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function eye(obj,fsym)
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function er = extinctionratio(obj,fsym,M)
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histpoints = 1024; %% verticale resolution
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histpoints = floor(histpoints/2)*2+1; %% to have the eye digram centered around one point make the vertical resolution uneven
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histpoints_horizontal = 512; %% horizontal resolution
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hist_data=zeros(histpoints,histpoints_horizontal ); %% initilize eye diagram
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disp('h');
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fsig = obj.fs;
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q = fsig/fsym;
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if q > 10 && isinteger(q)
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sig = (obj.signal);
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if isa(obj,'Opticalsignal')
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sig = abs(obj.signal).^2;
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elseif isa(obj,'Electricalsignal')
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sig = obj.signal;
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else
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sig = (obj.resample("fs_in",fsig,"fs_out",fsym*30).signal);
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q = 10;
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sig = obj.signal;
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end
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figure()
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x = (sig); %% make input signal rea)l
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x = resample(x,fsym*histpoints_horizontal/2,obj.fs); %% up sample to original fsym rate
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if mod(length(x),2)==1 %% if the signal lenght is not divisible by 2 (symbols displayed in the eye diagram are 2) remove last symbol
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x = x(1:end-1);
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end
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eye_mat = reshape(x(1:end-mod(length(x),histpoints_horizontal)),histpoints_horizontal,floor(length(x)/histpoints_horizontal)); %% reshape signal into 256 rows each row has the histogram(eye data of all symbols)
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maxA = max(sig(100:end-100));
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minA = min(sig(100:end-100));
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difference= maxA-minA;
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data_ind_y=round((eye_mat-minA)/difference*(histpoints-1)) +1;
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for n=1:size(data_ind_y,1)
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nn=histcounts(data_ind_y(n,:),1:histpoints+1);
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hist_data(:,n)=flip(nn.'); %without flip, the eye is upside down :-(
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end
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plot_data = 20*log10(hist_data);
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plot_data(plot_data==-Inf) = 0;
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maxall = 0;
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for l = 1:size(plot_data,2)
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[maxpk_,pos_] = max(plot_data(:,l));
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if maxpk_ > maxall
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maxall = maxpk_;
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posxall = l;
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posyall = pos_;
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end
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end
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hist_interest = plot_data(:,posxall);
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hist_interest_smoth = smooth(hist_interest,20);
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[pk,loc] = findpeaks(hist_interest_smoth,"MinPeakDistance",40,"NPeaks",M,"MinPeakHeight",30);
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for i = 1:numel(loc)
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ppeak(i) = maxA - (difference/histpoints*loc(i));
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end
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if isa(obj,'Opticalsignal')
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er=10*log10(ppeak(1)/ppeak(end));
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elseif isa(obj,'Electricalsignal')
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if mean([ppeak(1),ppeak(end)]) < 1e-2
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disp("No Extiction Ration for Bipolar Electrical Signal. Calculating Outer OMA instead...")
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er=max(ppeak)-min(ppeak);
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else
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er=10*log10(ppeak(1)/ppeak(end));
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end
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else
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er=10*log10(ppeak(1)/ppeak(end));
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end
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if 0
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findpeaks(hist_interest_smoth,"MinPeakDistance",40,"NPeaks",M,"MinPeakHeight",30);
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end
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end
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function eye(obj,fsym,M)
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mode = 1;
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histpoints = 1024; %% verticale resolution
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histpoints = floor(histpoints/2)*2+1; %% to have the eye digram centered around one point make the vertical resolution uneven
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histpoints_horizontal = 512; %% horizontal resolution
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hist_data=zeros(histpoints,histpoints_horizontal ); %% initilize eye diagram
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if isa(obj,'Opticalsignal')
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sig = abs(obj.signal).^2;
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elseif isa(obj,'Electricalsignal')
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sig = obj.signal;
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else
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sig = obj.signal;
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end
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x = (sig); %% make input signal rea)l
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x = resample(x,fsym*histpoints_horizontal/2,obj.fs); %% up sample to original fsym rate
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if mod(length(x),2)==1 %% if the signal lenght is not divisible by 2 (symbols displayed in the eye diagram are 2) remove last symbol
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x = x(1:end-1);
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end
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eye_mat = reshape(x(1:end-mod(length(x),histpoints_horizontal)),histpoints_horizontal,floor(length(x)/histpoints_horizontal)); %% reshape signal into 256 rows each row has the histogram(eye data of all symbols)
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figure(922)
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clf
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cursor = 200*q;
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if mode == 2
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% generate "intuitive eye diagram" by drawing lines on top over
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% each other; only draw 1000 lines, otherwise the plot is too
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% crowded
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col = cbrewer2('Set1',2);
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for n=1:1000
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hold on
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plot(eye_mat(:,n),'LineStyle',':','LineWidth',0.1,'Color',col(2,:));
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end
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ylabel('Amplitude of Signal');
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elseif mode == 1
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% generate eye diagram using histogram
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maxA = max(sig(100:end-100));
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minA = min(sig(100:end-100));
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difference= maxA-minA;
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data_ind_y=round((eye_mat-minA)/difference*(histpoints-1)) +1;
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for n=1:size(data_ind_y,1)
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nn=histcounts(data_ind_y(n,:),1:histpoints+1);
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hist_data(:,n)=flip(nn.'); %without flip, the eye is upside down :-(
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end
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plot_data = 20*log10(hist_data);
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plot_data(plot_data==-Inf) = 0;
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imagesc(plot_data);
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% beautify
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colormap(cbrewer2("Blues",4096));
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if isa(obj,'Opticalsignal')
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title("Optical Eye")
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ylabel("Power in mW");
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y_tickstring = string(linspace(maxA.*1e3,minA.*1e3,16));
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min_ = min(abs(obj.signal(100:end-100)).^2);
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max_ = abs(max(obj.signal(100:end-100)).^2);
|
||||
elseif isa(obj,'Electricalsignal')
|
||||
title("Electrical Eye")
|
||||
ylabel("Voltage in V");
|
||||
y_tickstring = string(linspace(maxA,minA,16));
|
||||
min_ = min(obj.signal(100:end-100));
|
||||
max_ = abs(max(obj.signal(100:end-100)));
|
||||
else
|
||||
title("Digital Eye")
|
||||
ylabel("Digital Signal Amplitude");
|
||||
y_tickstring = string(linspace(maxA,minA,16));
|
||||
min_ = min(obj.signal(100:end-100));
|
||||
max_ = abs(max(obj.signal(100:end-100)));
|
||||
end
|
||||
|
||||
% add information
|
||||
|
||||
if 1
|
||||
|
||||
pwr_dbm = round(obj.power,3);
|
||||
pwr_lin = obj.power("unit",power_notation.W);
|
||||
|
||||
papr_ = obj.papr_lin;%round(papr(obj.signal.^2),3);
|
||||
|
||||
yline( histpoints-(pwr_lin - minA)/difference*histpoints );
|
||||
yline( histpoints-(min_ - minA)/difference*histpoints );
|
||||
yline( histpoints-(max_ - minA)/difference*histpoints );
|
||||
|
||||
maxall = 0;
|
||||
for l = 1:size(plot_data,2)
|
||||
[maxpk_,pos_] = max(plot_data(:,l));
|
||||
if maxpk_ > maxall
|
||||
maxall = maxpk_;
|
||||
posxall = l;
|
||||
posyall = pos_;
|
||||
end
|
||||
end
|
||||
|
||||
hold on
|
||||
xline(posxall)
|
||||
|
||||
hist_interest = plot_data(:,posxall);
|
||||
hist_interest_smoth = smooth(hist_interest,20);
|
||||
a = scatter(hist_interest_smoth+posxall,1:length(hist_interest_smoth),4,'.','MarkerEdgeColor','red');
|
||||
|
||||
[pk,loc] = findpeaks(hist_interest_smoth,"MinPeakDistance",40,"NPeaks",M,"MinPeakHeight",30);
|
||||
scatter(posxall,loc,'red','Marker','x','LineWidth',2);
|
||||
yline(loc,'Color','red','LineWidth',1,'LineStyle',':');
|
||||
|
||||
for i = 1:numel(loc)
|
||||
ppeak(i) = maxA - (difference/histpoints*loc(i));
|
||||
end
|
||||
|
||||
oma = false;
|
||||
if isa(obj,'Opticalsignal')
|
||||
er=10*log10(ppeak(1)/ppeak(end));
|
||||
elseif isa(obj,'Electricalsignal')
|
||||
if mean([ppeak(1),ppeak(end)]) < 1e-2
|
||||
oma = true;
|
||||
er=max(ppeak)-min(ppeak);
|
||||
else
|
||||
er=10*log10(ppeak(1)/ppeak(end));
|
||||
end
|
||||
else
|
||||
er=10*log10(ppeak(1)/ppeak(end));
|
||||
end
|
||||
|
||||
% Define properties
|
||||
boxPosition = [0.15 0.86 0.2 0.05]; % Position for the first box [x y width height]
|
||||
boxColor = [0.9 0.9 0.9]; % Light grey background color
|
||||
boxEdgeColor = 'k'; % Black edge color
|
||||
boxLineStyle = '--'; % Dashed line style
|
||||
boxFontWeight = 'bold'; % Bold font
|
||||
|
||||
% Create first annotation box for Power
|
||||
annotation('textbox', boxPosition, ...
|
||||
'String', ['Power: ',num2str(pwr_dbm),' dBm'], ...
|
||||
'BackgroundColor', boxColor, ...
|
||||
'EdgeColor', boxEdgeColor, ...
|
||||
'LineStyle', boxLineStyle, ...
|
||||
'FontWeight', boxFontWeight, ...
|
||||
'HorizontalAlignment', 'center');
|
||||
|
||||
% Adjust position for the second box (slightly to the right)
|
||||
boxPosition = [0.37 0.86 0.2 0.05]; % Adjusted position
|
||||
|
||||
% Create second annotation box for PAPR
|
||||
annotation('textbox', boxPosition, ...
|
||||
'String', ['PAPR(lin):',num2str(papr_),''], ...
|
||||
'BackgroundColor', boxColor, ...
|
||||
'EdgeColor', boxEdgeColor, ...
|
||||
'LineStyle', boxLineStyle, ...
|
||||
'FontWeight', boxFontWeight, ...
|
||||
'HorizontalAlignment', 'center');
|
||||
|
||||
% Adjust position for the third box (slightly to the right)
|
||||
boxPosition = [0.59 0.86 0.2 0.05]; % Adjusted position
|
||||
|
||||
% Create third annotation box for Vmax
|
||||
if ~oma
|
||||
thirdboxstring = ['ER (db):',num2str(er),' dB'];
|
||||
else
|
||||
thirdboxstring = ['OMA outer:',num2str(er),' V'];
|
||||
end
|
||||
|
||||
annotation('textbox', boxPosition, ...
|
||||
'String',thirdboxstring , ...
|
||||
'BackgroundColor', boxColor, ...
|
||||
'EdgeColor', boxEdgeColor, ...
|
||||
'LineStyle', boxLineStyle, ...
|
||||
'FontWeight', boxFontWeight, ...
|
||||
'HorizontalAlignment', 'center');
|
||||
|
||||
|
||||
yticks(linspace(0,histpoints,16));
|
||||
yticklabels(y_tickstring);
|
||||
|
||||
end
|
||||
|
||||
|
||||
|
||||
|
||||
for s = 1:700
|
||||
plot(sig(cursor-q:cursor+q),'Color','black','LineWidth',0.1,'LineStyle','-');
|
||||
hold on
|
||||
cursor=cursor+q;
|
||||
s=s+1;
|
||||
end
|
||||
|
||||
ylim([-3 3]);
|
||||
|
||||
% disp('h');
|
||||
%
|
||||
% fsig = obj.fs;
|
||||
% q = fsig/fsym;
|
||||
%
|
||||
% if q > 10 && isinteger(q)
|
||||
% sig = (obj.signal);
|
||||
% else
|
||||
% sig = (obj.resample("fs_in",fsig,"fs_out",fsym*30).signal);
|
||||
% q = 10;
|
||||
% end
|
||||
%
|
||||
% figure()
|
||||
% clf
|
||||
% cursor = 200*q;
|
||||
%
|
||||
% for s = 1:700
|
||||
% plot(sig(cursor-q:cursor+q),'Color','black','LineWidth',0.1,'LineStyle','-');
|
||||
% hold on
|
||||
% cursor=cursor+q;
|
||||
% s=s+1;
|
||||
% end
|
||||
%
|
||||
% ylim([-3 3]);
|
||||
|
||||
|
||||
end
|
||||
|
||||
|
||||
Reference in New Issue
Block a user