MATLAB Answers

filter, decay, delayed versions

2 views (last 30 days)
PChoppala
PChoppala on 11 Sep 2012
Hello everyone,
I need advice on a simple query.
I need a FIR filter which has decay time specified by me.
The filter coefficients will decay either exponentially or any profile I want.
The filter will basically add delayed versions of my signal which is randn(1,1000).
How can I do this in matlab?
Cheers
P

  0 Comments

Sign in to comment.

Answers (1)

Jan
Jan on 11 Sep 2012
Perhaps something like this:
B = [1,3,2,4,5,6,4,3]; % Or "any profile you want"
B = B / sum(B); % For example
A = 1;
x = rand(1, 1000);
y = filter(B, A, x);

  1 Comment

PChoppala
PChoppala on 12 Sep 2012
Hi,
As per your code, y is one copy of a delayed version of x. That helps, thank you.
However, just to add, I want to specify as gain decay of x (say 60dB decay) as well as a delay of 1 sec,
can you please help in this?
Thanks
P

Sign in to comment.