Multiplierless FIR digital filter with two to the Nth power coef

Details Multiplierless FIR digital filter with two to the Nth power coef Multiplierless FIR digital filter with two to the Nth power coef

1986-10-27

1988-12-13

Malzahn, David H.

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G06F 1531

Patent

active

047915978

ABSTRACT:
A multiplierless digital FIR filter comprising a plurality of serially cascaded stages providing a non-linear series of two to the Nth power coefficient values, and in which quantization error is reduced by scaling the coefficient values to minimize root mean square error. Each stage includes a basic unit and an incremental unit, the basic unit providing two shift operations and including a delay element and an adder. To achieve a particular quantization error, one or more incremental units are connected in series with the basic unit in each stage, each such incremental unit providing a single shift operation and including a delay element and an adder. The number of incremental units in each stage and the number of cascaded stages can be selected to achieve a filter having desired performance characteristics and which can be realized on a VLSI chip.

REFERENCES:
patent: 3665171 (1972-05-01), Morrow
patent: 3696235 (1972-10-01), Tufts et al.
patent: 3979701 (1976-09-01), Tomozawa
patent: 3988606 (1976-10-01), Eggermont
patent: 4185325 (1980-01-01), Appel
patent: 4649507 (1987-03-01), Inaba et al.

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