Patent ID: 6088388
Filing Date: 2000-07-11
Classification: H03H

Abstract:
A finite impulse response (FIR) filter for compensation of Nyquist slope in a pseudo-synchronous demodulator comprising a plurality of individual FIR filters coupled in series having a bandpass filtered intermediate frequency video signal as an input to the first individual FIR filter in the series and a broadband video signal as an output from the last individual FIR filter in the series, the individual FIR filter amplitude responses representing respective product terms in the polynomialA(.omega.)=2(1+x)(1+x.sup.2) . . . (1+x.sup.2 (F-1))where F is the number of individual FIR filters in the series and X=(.omega..sub.m -.omega./.omega..sub.t, .omega..sub.m being the modulation frequency and .omega..sub.t being a deviation frequency.