-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I ran some quick trials and found that C takes around 18k (I was surprised it was this fast, actually!) iterations for the phaser amplitude to be off by 0.1%. So K around a hundred or a thousand should be good.
- -Dan Matt Ettus wrote: > Dan Halperin wrote: >> Two changes: >> >> 1) Default phase increment changed from 1 to 0. This will not cause >> faults and instead do nothing if the rotator phase is not initialized. > > Good idea. > >> 2) It seems like we can skip (expensive!) normalization of phase vector >> if we simply normalize phase and increment upon setup. I suppose there >> could be some lowest-order-bit precision errors that cause phase to >> degrade over a super-long-running system, but we could surely at least >> replace the current every-time normalization with normalization every K >> calls, for large K (1 million+). > > I would keep the normalization -- it's in there because we ran into > cases where the phasor really did decay to zero. However, I like the > idea of doing it every K times. Even if K is 100 the performance impact > will be negligible. > > Matt > > Matt -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFG4cVvy9GYuuMoUJ4RAtU7AJ9rmIPJ9/hW8Zo4V8vL9tbDWaztYQCcCFP6 +qCIWCEtkzja7XGBPYG1kzU= =1EsY -----END PGP SIGNATURE----- _______________________________________________ Patch-gnuradio mailing list Patch-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/patch-gnuradio
