On 12/19, Julius Smith wrote:
>
> All we can conclude from this test is that tf2s and svf are closer to each
> other than either is to tf2snp.
Julius, I can't believe it but it seems that tf2snp is just wrong
when cf is low ;)
test1:
F = 20;
w1 = 2*ma.PI*F;
a1s = -2.0*cos((ma.PI)*-1.0 + ma.PI/4.0);
hp_df = fi.tf2s(1,0,0,a1s,1,w1);
hp_np = fi.tf2snp(1,0,0,a1s,1,w1);
process = 1-1' <: hp_df, hp_np;
see the frequency response (0 - 200 hz), tf2snp is green:
http://people.redhat.com/onestero/svf/frr.png
lets recheck. test2:
F = 20;
w1 = 2*ma.PI*F;
a1s = -2.0*cos((ma.PI)*-1.0 + ma.PI/4.0);
hp_df = fi.tf2s(1,0,0,a1s,1,w1);
hp_np = fi.tf2snp(1,0,0,a1s,1,w1);
process = os.oscrs(97) <: hp_df, hp_np;
see the output, the first 5000 samples:
http://people.redhat.com/onestero/svf/osc.png
Oleg.
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