|
From: | Tom Rondeau |
Subject: | Re: [Discuss-gnuradio] gr.firdes.band_pass |
Date: | Sun, 4 Apr 2010 03:37:19 -0500 |
On Apr 3, 2010, at 11:56 PM, "Marcus D. Leech" <address@hidden> wrote:
Does firdes.band_pass *always* produce a working filter?
Yes, as long as the parameters are in order. If the filter is too long, you might have a problem, but this is just a guess to cover my blatant "yes." By too long, I mean huge and nothing I've run into.
I assume that it uses the Remez exchange algorithm to do its work. Whathappens if you ask for for a filter that can't be realized?
Gr.firdes uses the windowed filter approach. You use blks2.optfir for the Remez-based equiripple filters. Then, you'll be subjected to all of those restrictions, but it should throw an exception if the Remez can't converge.
Tom
[Prev in Thread] | Current Thread | [Next in Thread] |