Apparatus for generating scaled weighting coefficients for sampl

Details Apparatus for generating scaled weighting coefficients for sampl Apparatus for generating scaled weighting coefficients for sampl

1983-02-03

1985-01-15

Malzahn, David H.

Boots, shoes, and leggings

333166, G06F 1531

Patent

active

044942141

ABSTRACT:
A method is described for generating continuously variable sets of weighting coefficients for application to weighting circuits of a sampled data filter. The generated coefficients are produced by scaling the time axis of the impulse response described by a set of standard or nominal weighting coefficients in an inverse manner to a desired scaling of the filter frequency response. The coefficient values at the scaled time points are calculated by a piecewise linear interpolation process and correspond to the scaled coefficients. By this technique, a large number of sets of weighting coefficients may be generated from a single set of coefficients with relatively few circuit elements.

REFERENCES:
patent: 4125866 (1978-11-01), VanEssen et al.
patent: 4136398 (1979-01-01), Eggermont
patent: 4145747 (1979-03-01), Sakaki
patent: 4366547 (1982-12-01), Miller
patent: 4377793 (1983-03-01), Horna
patent: 4431976 (1984-02-01), Voorman
Tang et al., "Coefficient Correction in Programmable C.C.D. Recursive Filters" Electronics Letters, vol. 15, No. 20, Sep. 27, 1979, pp. 630-632.
Nakayama, "Permuted Difference Coefficient Digital Filter" Proceedings of the 1981 IEEE International Conference on Acoustics, Speech & Signal Processing, Atlanta, GA, Mar. 30, Apr. 1, 1981, pp. 1197-1200.
"CCD Adaptive Filter Employing Parallel Coefficient Updating", Electronic Letters, vol. 15, No. 18, Aug. 1979, pp. 573-575.

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