Boche, H.H.BochePohl, V.V.Pohl2022-03-042022-03-042008https://publica.fraunhofer.de/handle/publica/21602010.1109/TSP.2008.917422Spectral factorization is of fundamental importance in many areas of signal processing. This paper investigates the boundedness; behavior of the spectral factorization mapping in the Wiener algebra. Thereby, the focus lies on the factorization of polynomial spectral densities with a finite degree N since such spectra are especially important for practical applications. The paper presents a lower and an upper bound on the boundedness behavior which will show that the boundedness constant of the spectral factorization mapping gets worse as the degree N of the spectra increases. Therewith, one obtains independently the known result that the spectral factorization mapping is unbounded on the Wiener algebra.enpolynomialsignal processingspectral analysisWiener Filter621journal article