What filter command is actually doing
1 view (last 30 days)
Show older comments
When i use filter command
y=filter(filnum, filden, x);
it filters the data in vector x with the filter described by vectors filnum and filden to create the filtered data Y.
I can also say that it convolves the signal x with the filter defined by fulnum and filden
0 Comments
Accepted Answer
Wayne King
on 4 Nov 2011
Hi, yes filter() is convolution.
filter() actually uses what is called a direct-form II transposed structure to implement the convolution.
0 Comments
More Answers (2)
Wayne King
on 4 Nov 2011
I think detection by using the DFT is the way to go. I understand the exercise you were working on, but I think most real-world algorithms use the DFT. Look at that demo in the Signal Processing Toolbox that uses the Goertzel algorithm for the DFT at a small set of frequencies.
0 Comments
See Also
Categories
Find more on DTMF in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!