Electrical computers: arithmetic processing and calculating – Electrical digital calculating computer – Particular function performed
Patent
1997-10-20
1999-12-07
Ngo, Chuong Dinh
Electrical computers: arithmetic processing and calculating
Electrical digital calculating computer
Particular function performed
G06F 1710
Patent
active
059999551
ABSTRACT:
An N.sup.th order infinite impulse response digital filter for long-delay filtering of signals representing a digital input sequence. The N.sup.th order infinite impulse response digital filter is synthesized by cascading in series N first order infinite impulse response filter stages. A filter stage operable on a digital computer with floating point capability is provided and comprises a multiplier which multiplies an input signal with a weighting factor. A summing element provides an output for the filter stage by summing the weighted input signal with a weighted and delayed output signal. A filter operable on a digital computer with fixed point capability is provided and comprises a summing element which sums an input signal with the output of a first multiplier, and the delayed output of a mask element. The output of the summing element is coupled to the input of a second multiplier and to the input of the mask element. The second multiplier provides an output for the filter stage which is also used, in a delayed form as the input of the first multiplier.
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Davis, Jr. Leighton Ira
Matteson Robert Wayne
Ford Global Technologies Inc.
May, Esq. Roger L.
Mollon, Esq. Mark L.
Ngo Chuong Dinh
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