Run-time coefficient generation for digital filter with...

Pulse or digital communications – Equalizers – Automatic

Reexamination Certificate

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C375S332000, C329S304000

Reexamination Certificate

active

07027502

ABSTRACT:
A method for slewing a bandwidth characteristic of a digital filter within a range between a first bandwidth characteristic and a second bandwidth characteristic. The digital filter includes a plurality of cascaded filter sections and each of the sections has respective coefficients. The method establishes a polynomial having an order greater than or equal to two for modeling a changing value of one of the coefficients at the bandwidth characteristics within the range. An index value is determined for identifying a desired bandwidth characteristic within the range. The index value is input into the polynomial to obtain a corresponding coefficient value for the one coefficient. The coefficient value is then loaded into a respective filter section.

REFERENCES:
patent: 5303413 (1994-04-01), Braegas
patent: 5502663 (1996-03-01), Lyon
patent: 5856934 (1999-01-01), Nakajima et al.
patent: 6154547 (2000-11-01), Whitecar
patent: 6907026 (2005-06-01), Akiyama
patent: 2003/0102991 (2003-06-01), Pasquier
patent: 1313219 (2003-05-01), None

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