Method for calibrating a quadrature modulator and a...

Details Method for calibrating a quadrature modulator and a... Method for calibrating a quadrature modulator and a...

2006-12-18

2010-11-30

Burd, Kevin M (Department: 2611)

Pulse or digital communications

Transmitters

Quadrature amplitude modulation

Reexamination Certificate

active

07844015

ABSTRACT:
A method and system for calibrating a quadrature modulator. The method includes: determining a set of sideband calibration frequencies; for each sideband calibration frequency out of the set of sideband calibration frequencies: inputting an input signal having the sideband calibration frequency to the quadrature modulator; measuring a sideband signal power level; determining at least one calibration parameter in response to phase and gain imbalances expected at the measured sideband signal power level.

REFERENCES:
patent: 6340883 (2002-01-01), Nara et al.
patent: 6459458 (2002-10-01), Balaban
patent: 6618096 (2003-09-01), Stapleton
patent: 7369813 (2008-05-01), Andersson
patent: 7570127 (2009-08-01), Ryan et al.
patent: 2004/0082305 (2004-04-01), Kirschenmann et al.
patent: 2008/0043881 (2008-02-01), Franke

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