Reduced state fir filter

Details Reduced state fir filter Reduced state fir filter

1992-09-14

1994-11-29

Malzahn, David H.

Boots, shoes, and leggings

3647241, G06F 1531

Patent

active

053696069

ABSTRACT:
A method and apparatus for increasing the throughput of a finite impulse response (FIR) digital filter with particular applicability to systems in which the input signal sample values are constrained relative to the output signal. The method and apparatus include relatively constrained input data and positional information for identifying the location of the precomputed values of the state of the filter. A lookup table stores all the states of the filter (i.e., the sums of the products of signal sample values times filter weighting coefficients).

REFERENCES:
patent: 4450533 (1984-05-01), Petit et al.
patent: 4691293 (1987-09-01), Conboy
patent: 4953184 (1990-08-01), Simone
patent: 5210705 (1993-05-01), Chauvel et al.
J. R. Bennett et al. "On the Characteristics of a Simple Architecture for Finite Impulse Digital Filter", IEEE Transactions on Computers, vol. C-27, No. 12, Dec. 1978, pp. 1197-1202.

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