Variable-passband variable-phase digital filter

Details Variable-passband variable-phase digital filter Variable-passband variable-phase digital filter

1984-12-28

1987-11-24

Harkcom, Gary V.

Boots, shoes, and leggings

G06F 1531

Patent

active

047093439

ABSTRACT:
A variable-passband, variable-phase digital filter in which Q digital samples of a signal are entered through (Q-1) delay lines, to be delayed into q two-bit adjacent doublets. Weighting tables in read only memories are addressed by each doublet. Each weighting table includes the results of linear combinations of the weights of doublets composed of bits of the same order multiplied by multiplier coefficients which are smaller than unity. Each integral portion of a result found in a table is applied at the same time as the fractional portions of the other results provided by the other tables to the addressing inputs of a programmed memory containing binary words. Binary words are addressed in the prorammed memory by the integral and fractional portions of the results found in the weighting tables. Each binary word has a value equal to the linear combination of the corresponding values of the samples of the signal by the multiplier coefficients.

REFERENCES:
patent: 3822404 (1974-07-01), Croisier et al.
patent: 3993890 (1976-11-01), Peled et al.
patent: 4374426 (1983-02-01), Burlage et al.
patent: 4484299 (1984-11-01), Lambourn et al.
Jenkins, "A Comparison of Residue Number Multipliers and 2's Complement Multipliers Implement by Store Multiplication Tables" 1978 IEEE Inter. Symposium on CKT & SYS. Proceedings.
Liu et al., "A Note on Implementation of Digital Filters" IEEE Trans. on Acoustics, Speech, and Signal Processing, Aug. 1975, pp. 387-389.
Schroder, "High Word-Rate Digital with Programmable Table Look-Up" IEEE Trans. on Circuits & Systems, May 1977, pp. 277-279.

Affiliated with

Also associated with

Rating

Variable-passband variable-phase digital filter does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Variable-passband variable-phase digital filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable-passband variable-phase digital filter will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2425344