13.07.2015 Views

Signalbehandling Formelsamling

Signalbehandling Formelsamling

Signalbehandling Formelsamling

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Tabell 4.1Koefficienter a ν i Butterworthpolynom s N + a N−1 s N−1 + ...+ a 1 s +1N a 1 a 2 a 3 a 4 a 5 a 6 a 712√23 2 24 2.613 3.414 2.6135 3.236 5.236 5.236 3.2366 3.864 7.464 9.141 7.464 3.8647 4.494 10.103 14.606 14.606 10.103 4.4948 5.126 13.138 21.848 25.691 21.848 13.138 5.126Tabell 4.2Faktoriserade Butterworthpolynom för Ω p =1.För Ω p ≠1låt s → s/Ω p .N1 (s +1)2 (s 2 + √ 2s +1)3 (s 2 + s +1)(s +1)4 (s 2 +0.76536s +1)(s 2 +1.84776s +1)5 (s +1)(s 2 +0.6180s +1)(s 2 +1.6180s +1)6 (s 2 +0.5176s +1)(s 2 + √ 2s +1)(s 2 +1.9318s +1)7 (s +1)(s 2 +0.4450s +1)(s 2 +1.2465s +1)(s 2 +1.8022s +1)8 (s 2 +0.3896s +1)(s 2 +1.1110s +1)(s 2 +1.6630s +1)(s 2 +1.9622s +1)3.1.2 Chebyshevfilter|H(Ω)| =K√ ( )1+ε 2 TN2 ΩΩ pRipple|H( Ω)|N uddaKK√1+ε2N jämnΩ pKurvan går alltidgenom denna punktΩRipple = 10 · log(1 + ε 2 )dB.K = amplitudfunktionens maximivärde.OBS! Ej nödvändigtvis 3dB-gräns22

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!