Pulse or digital communications – Receivers – Amplitude modulation
Reexamination Certificate
2005-09-27
2005-09-27
Tran, Khai (Department: 2637)
Pulse or digital communications
Receivers
Amplitude modulation
C329S356000, C329S357000, C455S204000
Reexamination Certificate
active
06950481
ABSTRACT:
A vestigial-sideband (VSB) signal is converted to a double-sideband amplitude-modulation signal having information that is subsequently detected in the double-sideband amplitude-modulation signal. A method for performing the conversion includes mixing the VSB signal with a first beat frequency different from a carrier frequency of the VSB signal, the first beat frequency being of such value as to generate a first mixing result that is translated in frequency to have a carrier at an offset frequency; mixing the VSB signal with a second beat frequency different from the carrier frequency of the VSB signal and from the first beat frequency, the second beat frequency being of such value as to generate a second mixing result that is translated in frequency to have a earner at the offset frequency; and combining the first and second mixing results to form the double-sideband amplitude-modulation signal with a carrier frequency at the offset frequency.
REFERENCES:
patent: 2583573 (1952-01-01), Jaynes
patent: 2987617 (1961-06-01), Loughlin
patent: 5479449 (1995-12-01), Patel et al.
patent: 5805242 (1998-09-01), Strolle et al.
patent: 6421403 (2002-07-01), Limberg
Lugo David B.
Samsung Electronics Co,. Ltd.
Sughrue & Mion, PLLC
LandOfFree
Digital television receiver converting vestigial-sideband... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital television receiver converting vestigial-sideband..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital television receiver converting vestigial-sideband... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3412788