convolution of two signals

Question

Yuvashree Mani Urmila 2014-6-12

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https://ww2.mathworks.cn/matlabcentral/answers/133958-convolution-of-two-signals

回答： Sandeep Maurya 2017-8-28

Capture111.PNG

I have two signals represented by x and y values respectively. I have to find the convolution between the two signals. I am attaching the graph plotted from the two signals. can someone help. Thanks.

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Answer 1

José-Luis 2014-6-12

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在 MATLAB Online 中打开

You could use the conv() function. It seems to do exactly what you want.

conv(x,y)

Please read the documentation.

doc conv

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Yuvashree Mani Urmila 2014-6-13

thanks for your help after importing the data i have four sets of values. but in conv function i have to input the two signals(signal 1 and signal 2) i suppose. but how to represent the x and y values as signal 1 and signal 2

José-Luis 2014-6-13

Use conv() two times? I am sorry but I don't understand.

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Answer 2

Image Analyst 2014-6-13

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numbers = xlsread(excelFullFileName);
x1 = numbers(:, 1); % x1 assumed to be in column 1.
y1 = numbers(:, 2); % y1 assumed to be in column 2.
x2 = numbers(:, 3); % x2 assumed to be in column 3.
y2 = numbers(:, 4); % y2 assumed to be in column 4.
out1 = conv(x1,y1);
out2 = conv(x2,y2);

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Answer 3

Shahin Alam 2017-1-4

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编辑：Image Analyst 2017-1-4

在 MATLAB Online 中打开

x=[1,1,1];
y=[1,1,1];

How can I find its convolution ?

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Image Analyst 2017-1-4

在 MATLAB Online 中打开

output = conv(x, y, 'full');
plot(output, 'bo-', 'LineWidth', 2);
grid on;

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Answer 4

Sandeep Maurya 2017-8-28

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x=input('Enter x: ') h=input('Enter h: ') m=length(x); n=length(h); X=[x,zeros(1,n)]; H=[h,zeros(1,m)]; for i=1:n+m-1 Y(i)=0; for j=1:m if(i-j+1>0) Y(i)=Y(i)+X(j)*H(i-j+1); else end end end Y stem(Y); ylabel('Y[n]'); xlabel('----->n'); title('Convolution of Two Signals without conv function');