HW 3.7 - Evan Witkoske ECE301 summer2009 - Rhea

%Evan Witkoske

%Convolution problem HW 3.7

%ECE 301 7/2/09

close all clear all

x = input('Input array with brackets and commas between each component:')

h = input('Input array with brackets and commas between each component:')

x1 = length(x);

h1 = length(h);

%We have to add the zeros so if the two arrays are not the same size then the following command will add them %Matlab will not allow, like mathematics in general, two different sized arrays to be added together.

X1 = [x , zeros(1,x1)];

H1 = [h , zeros(1,h1)];

for i=1:x1+h1-1

Y(i)=0;

for j=1:x1

%this is a for loop within the first for loop, I just lost the spacing

if(i-j+1>0)

Y(i) = Y(i)+X1(j)*H1(i-j+1);

else end end end

>> help conv

CONV Convolution and polynomial multiplication.
   C = CONV(A, B) convolves vectors A and B.  The resulting
   vector is length LENGTH(A)+LENGTH(B)-1.
   If A and B are vectors of polynomial coefficients, convolving
   them is equivalent to multiplying the two polynomials.

   Class support for inputs A,B: 
      float: double, single

   See also deconv, conv2, convn, filter and, in the signal
   Processing Toolbox, xcorr, convmtx.

   Overloaded methods:
      gf/conv

   Reference page in Help browser
      doc conv