MATLAB: How to isolate one pulse from a periodic pulse train

arraycsvpeakpulse

I want to isolate on pulse from this waveform, the data is in a CSV file and the 2 columns contain time data and voltage data.

I want to use a MATLAB code to trim out one full pulse (+peak,zero,-peak,zero)

How can I do this, the peak value is shown using the data cursor

Best Answer

One approach:

t = linspace(0, 2.3, 500);                                                          % Time Vector
pulses = -0.14*sign(sin(5*pi*t/2).*(abs(sin(5*pi*t/2))>0.9)) + rand(size(t))*0.005; % Create Waveform
Mv = pulses > 0.1;                                                                  % Threshold
Mvs = strfind(Mv, [0 1]);                                                           % Start Of Each Pulse
Mve = strfind(Mv, [1 0])+1;                                                         % End Of Each Pulse
figure
plot(t, pulses)
hold on
plot(t(Mvs(1):Mve(1)), pulses(Mvs(1):Mve(1)), '+')
hold off

Make appropriate changes to work with your signal.

Related Solutions

MATLAB: Trapezoidal pulse generation using gensig() function

The answer is No! .I am not aware of any function which can do that for you. Try to adapt my function for your needs or write your own.

%Does this work for you?
[t,p]=Trapezoidal_pulse(1,3,0.01,1,1,5,8);
figure,plot(t,p)

The function:

%%
function [t,pulse_train]=Trapezoidal_pulse(Amplitude,FlatTopTime,DwellTime,RiseTime,FallTime,DeadTime,Repetitions)
%[t,pulse_train]=Trapezoidal_pulse(Amplitude,FlatTopTime,DwellTime,RiseTime,FallTime,DeadTime,Repetitions)
% All times are of same units
% DwellTime-1/Sampling rate or raster time
% DeadTime- Dead Time after each pulse
%Repetitions -Number of Trapezoidal pulses
if(RiseTime<DwellTime)
    warn('RiseTime<DwellTime: No Ramp up samples')
    rampup_samples=[];
else
    rampup_samples= linspace(0,Amplitude,ceil(RiseTime/DwellTime));
end
if(FallTime<DwellTime)
    warn('FallTime<DwellTime: No Ramp down samples')
    rampdown_samples=[];
else
    rampdown_samples= linspace(Amplitude,0,ceil(FallTime/DwellTime));
end
pulse=[rampup_samples Amplitude*ones(1,ceil(FlatTopTime/DwellTime)) rampdown_samples zeros(1,ceil(DeadTime/DwellTime))];
%bipolar
% pulse_train=repmat(pulse,[Repetitions 1]).'.*(-1*ones(length(pulse),1)).^(0:Repetitions-1);
%unipolar
pulse_train=repmat(pulse,[Repetitions 1]).';
pulse_train=pulse_train(:);
%time
t=(0:(length(pulse_train)-1))*DwellTime;
end

Use doc or edit command to see the ownership and year at which the function is added to matlab.

MATLAB: Random pulse generator

use this block

the function is

function y = fcn(u)
%#codegen
id=rand(1)
if id>0.5 & u==0
  y=1
else
  y=0
end

or easier

Best Answer

Related Solutions

MATLAB: Trapezoidal pulse generation using gensig() function

MATLAB: Random pulse generator

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