FIR filter in Matlab for bandpass 250kHz - 700kHz and sampling frequency 250MSPS
1 view (last 30 days)
Show older comments
Hi all,
I want to design filter to implement on FPGA with a mentioned parameters in subject but when i am starting to design it on matlab fdatool, it gives very high order filter result, and when i decrease or set by myself upto 10 order its impulse response is not good as i want.
Any idea will be highly appreciable.
Regards,
Umair
0 Comments
Answers (2)
Honglei Chen
on 19 May 2014
If you are interested in the band between 250 kHz and 700 kHz only, then you can decimate your signal to, say 2 MHz first. Then you don't need a filter with such high order to satisfy your requirement.
HTH.
0 Comments
Umair
on 19 May 2014
Edited: Umair
on 19 May 2014
1 Comment
Honglei Chen
on 19 May 2014
You can use decimate function to do that
to go from 250MHz to 2MHz, you need to decimate by a factor of 125. It basically drops the samples in between since you really don't need a sample rate that high
See Also
Categories
Find more on Digital Filter Analysis 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!