Pulse or digital communications – Receivers – Amplitude modulation
Reexamination Certificate
2008-01-29
2008-01-29
Payne, David C. (Department: 2611)
Pulse or digital communications
Receivers
Amplitude modulation
C375S232000, C375S350000, C702S017000, C702S189000, C702S191000
Reexamination Certificate
active
10614932
ABSTRACT:
VSB reception system with a frequency domain equalizer including a demodulating part for receiving, converting, and demodulating a signal, a frequency domain equalizing part for equalizing the demodulated signal for removing a distorted component from the demodulated signal, and a noise removing part for (a) receiving the equalized signal, (b) calculating a reference error signal that is a difference between the equalized signal and the signal having the noise removed therefrom, (c) calculating an error signal that is a difference between the reference error signal and the extracted noise signal, (d) renewing parameters with reference to the reference error signal and the error signal, and (e) calculating a difference between the equalized signal and the extracted noise signal, to provide a signal having the noise removed therefrom.
REFERENCES:
patent: 2001/0033341 (2001-10-01), Limberg
patent: 2002/0072879 (2002-06-01), Sweitzer et al.
Bernard Widrow and Samuel Stearns; Adaptive Signal Processing; 1985; Prentice-Hall; pp. 99-101.
DSouza Adolf
Lee Hong Degerman Kang & Schmadeka
LG Electronics Inc.
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