Pulse or digital communications – Receivers – Interference or noise reduction
Patent
1993-09-21
1995-12-26
Chin, Stephen
Pulse or digital communications
Receivers
Interference or noise reduction
375229, 36472403, 364745, H04B 110, H03H 730
Patent
active
054794544
ABSTRACT:
A digital filter characterized by a plurality of filter coefficients, positive ones of the coefficients being represented by unsigned binary integers and negative ones of the coefficients being represented by 2's complement binary integers, comprising an input for receiving a digital input signal comprising a first predetermined number of bits; means for truncating or rounding at least one leading "0" or trailing "0" of the positive ones of the coefficients and at least one leading "1" or trailing "0" of the negative ones of the coefficients, such that significance of the integers is removed; means for successively delaying the digital input signal to produce successively delayed versions of the digital input signal; means for multiplying the successively delayed versions of the digital input signal by respective ones of the truncated representations of the respective ones of the plurality of filter coefficients and in response generating a plurality of intermediate product integers; means for restoring significance to the intermediate product integers; and means for summing the intermediate product integers and in response generating a digital output signal.
REFERENCES:
patent: 4034197 (1977-07-01), Lawrence et al.
patent: 5023825 (1991-06-01), Luthra
patent: 5170369 (1992-12-01), Rossum
patent: 5222035 (1993-06-01), Nakase et al.
patent: 5262974 (1993-11-01), Hansman et al.
patent: 5355328 (1994-10-01), Arbeiter et al.
Greggain Lance
Mandl Peter
Bogure Tesfaldet
Chin Stephen
Genesis Microchip Inc.
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