Digital filter methods and structures for increased...

Details Digital filter methods and structures for increased... Digital filter methods and structures for increased...

2006-03-14

2006-03-14

Malzahn, D. H. (Department: 2193)

Electrical computers: arithmetic processing and calculating

Electrical digital calculating computer

Particular function performed

C708S315000

Reexamination Certificate

active

07013319

ABSTRACT:
Digital filters are provided that include a converter and a data processor. The converter converts successive strings of M successive data elements that occur at a system rate Fsin an input data stream Dinto M parallel data elements that respectively occur at a substream rate Fs/M in M data substreams Dsbstrm. At a reduced substream rate Fs/M, the processor generates M convolutions of the filter's quantized impulse response with the M data substreams wherein each of the convolutions is arranged to generate a different one of M successive filtered output signals. Because the convolutions are conducted at the reduced substream rate Fs/M, the filters can operate at increased system rates. Preferably, the digital filter also includes a multiplexer that selects, at the system rate Fs, the M filtered output signals in successive order to thereby form a filtered output data stream Dout.

REFERENCES:
patent: 5777912 (1998-07-01), Leung et al.
patent: 5831879 (1998-11-01), Yom et al.
patent: 6182103 (2001-01-01), Zierhofer
patent: 6260053 (2001-07-01), Maulik et al.
patent: 6529926 (2003-03-01), Capofreddi
patent: 6553398 (2003-04-01), Capofreddi
patent: 2002/0152250 (2002-10-01), Staszewski

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