What filter command is actually doing
2 次查看(过去 30 天)
显示 更早的评论
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 个评论
采纳的回答
Wayne King
2011-11-4
Hi, yes filter() is convolution.
filter() actually uses what is called a direct-form II transposed structure to implement the convolution.
0 个评论
更多回答(2 个)
Wayne King
2011-11-4
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 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 DTMF 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!