Digital signal processing arrangement including a wave digital f

Details Digital signal processing arrangement including a wave digital f Digital signal processing arrangement including a wave digital f

1976-12-16

1978-06-13

Malzahn, David H.

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333 70R, 364745, G06F 1534, H03H 710

Patent

active

040952762

ABSTRACT:
A digital signal processing arrangement including a wave digital filter having quantizing means for limiting the signal waves present to a predetermined word length by means of controlled rounding. "Controlled rounding" means that a limit-cycle-free output signal is obtained when a constant input signal is present. If the outgoing signal waves from the N-port adaptor are equal to b.sub.o (j,k), and the signal waves applied to the adaptor are equal to a(j,k), b(j,k) is equal the desired and quantized value of b.sub.o (j,k), where j represents the number of the port, then the process of controlled rounding quantizes b.sub.o (j,k) in such a way that ##EQU1## Here the c(i,j) represent constant coefficients, and r the number of independent information signal waves.

REFERENCES:
patent: 3919671 (1975-11-01), Fettweis
patent: 3967099 (1976-06-01), Fettweis
patent: 3980872 (1976-09-01), Fettweis
patent: 3997770 (1976-12-01), Claasen et al.
H. J. Butterweck, "Suppression of Parasitic Oscillations in Second-Order Digital Filters by Means of a Controlled-Rounding Arithmetic" Archiv fur Elektronik und Ubertragungstechnik, Band 29-Heft 9, SEP. 1975, pp. 371-374.
A. Fettweis et al., "On Adaptors for Wave Digital Filters" IEEE Trans. on Acoustics, Speech & Signal Processing, vol. ASSP-23, No. 6, Dec. 1975, pp. 516-525.

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