Reconfigurable FIR filter using CSD coefficient representation

Details Reconfigurable FIR filter using CSD coefficient representation Reconfigurable FIR filter using CSD coefficient representation

2007-01-16

2007-01-16

Ghayour, Mohammed (Department: 2631)

Pulse or digital communications

Equalizers

C370S286000

Reexamination Certificate

active

10446230

ABSTRACT:
The present invention is directed to a reconfigurable finite impulse response (FIR) filter that processes data tap values with canonical sign digit (CSD) coefficients. The FIR filter according to the present invention includes a shift group associated with at least one of the data tap values and at least one of the CSD coefficients. Each shift group includes a plurality of parallel paths. Each parallel path shifts the data tap value according to a bit pair of the coefficient to produce a weighted product. An adder is also included that combines the weighted products from each of the shift groups.

REFERENCES:
patent: 5262974 (1993-11-01), Hausman et al.
patent: 5687229 (1997-11-01), Sih
patent: 5831880 (1998-11-01), Lee
patent: 6044068 (2000-03-01), El Malki
patent: 6263036 (2001-07-01), Yamamoto et al.
patent: 292189 (1988-11-01), None

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