convolution Problem

Discussion in 'Homework Help' started by MrYu, Aug 14, 2012.

  1. MrYu

    Thread Starter Member

    Sep 26, 2011
    42
    0
    evaluate y(n)= x(n) * h(n) where x(n) and h(n) are sequences show below

    [​IMG]

    do i need to multiply the value of h(n) to x(n) and shift h(n) to the right 1,2,3 and so on?
     
  2. Zazoo

    Member

    Jul 27, 2011
    114
    43
    Think of the process as flipping one signal across the y-axis and then sliding it across the other signal, multiplying the aligned terms and summing the results at each step to find the values of the output sequence. Using a tabular method is easiest for convolution sums using short sequences.

    Write the values of one sequence from left-to-right across the top of the table. Write the values of the other sequence from top-to-bottom along the left side of the table. Now, fill in the table with the product of the values at each row/column intersection. Starting at the top-left of the table, sum each diagonal (sum the products only, not the orignal sequence values at the top and left of the table) . These diagonal sums are the values of the output sequence.

    I can post a picture/example when I'm at a PC if that will help.
     
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