Telecommunications – Transmitter and receiver at separate stations – Distortion – noise – or other interference prevention,...
Reexamination Certificate
2011-03-29
2011-03-29
Nguyen, Duc (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Distortion, noise, or other interference prevention,...
C455S067110, C455S278100, C455S296000, C375S345000, C375S346000
Reexamination Certificate
active
07917091
ABSTRACT:
Methods and apparatus for calibrating In-phase and Quadrature imbalance within a receiver are described. A calibration process can inject a calibration tone to an RF or IF portion of a receiver. The receiver can frequency translate the tone to distinct I and Q calibration signals. The receiver upconverts the I and Q calibration signals to complementary sidebands or images using distinct and substantially matched upconverters. The complementary sidebands are mixed together to generate an error signal. The receiver determines a phase and amplitude correction based on the error signal.
REFERENCES:
patent: 4122448 (1978-10-01), Martin
patent: 4953182 (1990-08-01), Chung
patent: 5828955 (1998-10-01), Lipowski et al.
patent: 6044112 (2000-03-01), Koslov
patent: 6330290 (2001-12-01), Glas
patent: 6459693 (2002-10-01), Park et al.
patent: 6558543 (2003-05-01), Sandberg et al.
patent: 6744829 (2004-06-01), Mohindra
patent: 6760577 (2004-07-01), Li
patent: 7003262 (2006-02-01), Fukui
patent: 7020220 (2006-03-01), Hansen
patent: 7181205 (2007-02-01), Scott et al.
patent: 7585010 (2009-09-01), Hardy et al.
patent: 7620373 (2009-11-01), Cole et al.
patent: 7627060 (2009-12-01), Taylor
patent: 7627295 (2009-12-01), Takahiko et al.
patent: 2002/0177425 (2002-11-01), Li
patent: 2003/0174641 (2003-09-01), Rahman
patent: 2003/0206603 (2003-11-01), Husted
patent: 2004/0184562 (2004-09-01), Wang et al.
patent: 2005/0047536 (2005-03-01), Wu et al.
patent: 2005/0148304 (2005-07-01), Jerng
patent: 2005/0260949 (2005-11-01), Kiss et al.
patent: 2006/0068739 (2006-03-01), Maeda et al.
patent: WO 2008/003061 (2008-01-01), None
International Search Report of Feb. 18, 2008 for international application No. PCT/US2007/072399.
Written Opinion of Feb. 18, 2008 for international application No. PCT/US2007/072399.
Montemayor Raymond
Ye Sheng
Chow Charles
Kilpatrick Townsend & Stockton LLP
MaxLinear, Inc.
Nguyen Duc
Tabibi Ardeshir
LandOfFree
Method and apparatus for calibrating the sideband rejection... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for calibrating the sideband rejection..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for calibrating the sideband rejection... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2770573