Naslov
Noncausal IIR Fractional Hilbert Transformers With Equiripple or Flat Phase Response
(Noncausal IIR Fractional Hilbert Transformers with Equiripple or Flat Phase Response)

Autori
Molnar, Goran ; Vučić, Mladen

Izvornik
IEEE transactions on circuits and systems. II, Express briefs (1549-7747) 57 (2010), 9; 745-749

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
fractional Hilbert transformer; noncausal IIR system; allpass system; equiripple phase; flat phase; elliptic approximation

Sažetak
Noncausal infinite impulse response (IIR) systems yield a much better approximation of desired response than do the causal systems of the same complexity. Today's technology also enables their efficient implementation. In the design of Hilbert transformers, the noncausal approach has been exploited only for conventional transformers. This paper presents a method for the design of noncausal IIR fractional Hilbert transformers based on the elliptic approximation of the desired phase shift. Allpass transformers with equiripple and with flat phase responses are considered. The method is given in a closed form, which makes the design robust and suitable for high-order transformers.

Izvorni jezik
Engleski

Znanstvena područja
Elektrotehnika, Računarstvo

POVEZANOST RADA