I/Q impairment calibration using a spectrum analyzer

Details I/Q impairment calibration using a spectrum analyzer I/Q impairment calibration using a spectrum analyzer

2011-06-28

2011-06-28

Mis, David (Department: 2817)

Modulators

Phase modulator

C455S323000

Reexamination Certificate

active

07969254

ABSTRACT:
A quadrature modulator (QM) may be calibrated by determining total equivalent offsets in the I- and Q-channels, a total equivalent gain imbalance between the I- and Q-channels, and a total equivalent phase skew between the I- and Q-channels. These values may be obtained by taking various scalar measurements of the image to signal ratio (ISR) and carrier to signal ratio (CSR) of the QM, while alternatively altering the system gain imbalance, system phase skew, I-channel offset and Q-channel offset using a respective gain parameter, phase parameter, I-channel offset parameter, and Q-channel parameter. The gain and phase parameters may be defined in terms of the ISR, and the channel offset parameters may be defined in terms of the CSR. The system gain imbalance, system phase skew, and total offset in the channels may then be calculated based on the various ISR and CSR measurements.

REFERENCES:
patent: 5119399 (1992-06-01), Santos et al.
patent: 6340883 (2002-01-01), Nara et al.
patent: 6421397 (2002-07-01), McVey
patent: 6421398 (2002-07-01), McVey
patent: 6574286 (2003-06-01), McVey
patent: 6842489 (2005-01-01), Masenten
patent: 7203614 (2007-04-01), Chang
patent: 7856048 (2010-12-01), Smaini et al.
patent: 2005/0152481 (2005-07-01), Lin et al.
patent: 2006/0176975 (2006-08-01), Hsieh et al.
patent: 2007/0025474 (2007-02-01), Moorti et al.
patent: 2008/0317171 (2008-12-01), Jungerman
patent: 2009/0180527 (2009-07-01), Asami
patent: 2010/0099363 (2010-04-01), Faust et al.
patent: 2010/0329392 (2010-12-01), Jensen et al.

Affiliated with

Also associated with

Rating

I/Q impairment calibration using a spectrum analyzer does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with I/Q impairment calibration using a spectrum analyzer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and I/Q impairment calibration using a spectrum analyzer will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2653598