Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-10-31
2006-10-31
Vo, Don N. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S297000, C455S114300, C455S126000
Reexamination Certificate
active
07130357
ABSTRACT:
An apparatus and a method for compensating an error of an AQM measuring and compensating the error using returned I/Q digital signals calculate the error compensating signal is disclosed. The process includes detecting a DC offset signal by averaging sampling values of returned I/Q digital signals; detecting a gain compensating signal using a maximum value in a period of the I/Q digital signals of which the DC offset is compensated; and detecting a phase compensating value of the I/Q digital signals on the basis of sum of absolute values for differences between the gain compensated I-digital signals and Q-digital signals, and remove phase error, gain error and DC offset of the inputted digital signal sequentially to compensate the AQM error.
REFERENCES:
patent: 5732333 (1998-03-01), Cox et al.
patent: 6081158 (2000-06-01), Twitchell et al.
patent: 6515712 (2003-02-01), Jeong
patent: 2002/0018531 (2002-02-01), Ratto
patent: 1206251 (1999-01-01), None
Office Action issued by the Patent Office of the People's Republic of China on May 20, 2005 (English Full Text & Chinese Full Text).
Kim Woo-Sik
Moon Jin-Sub
LG-Nortel Co., Ltd.
Vo Don N.
LandOfFree
Apparatus and method for compensating error for analog... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for compensating error for analog..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for compensating error for analog... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3710938