Does firdes.band_pass always produce a working filter?
I assume that it uses the Remez exchange algorithm to do its work. What
happens if you ask for
for a filter that can’t be realized?
Right now, I have a bunch of filters that are roughly 200Hz wide, and
I’d asked firdes.band_pass to
produce filters that had 5Hz transition bands. The result was a CPU
hog, so I backed-off to transition
bands that are roughly 20Hz wide. Less CPU usage now. Is there any
way to tell if firdes.band_pass produced
a correctly “converged” filter?
Shirleys Bay Radio Astronomy Consortium