Method and apparatus for I/Q mismatch calibration of...

Details Method and apparatus for I/Q mismatch calibration of... Method and apparatus for I/Q mismatch calibration of...

2007-11-20

2007-11-20

Corrielus, Jean B. (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C455S114300, C455S115100, C455S067110

Reexamination Certificate

active

10645107

ABSTRACT:
A method for I/Q mismatch calibration of a transmitter. First, a discrete-time signal is generated. Next, a corrected signal based on the discrete-time signal and a set of correction parameters Apand Bpis obtained. Next, the corrected signal is converted to an analog corrected signal. Next, I/Q modulation is applied to the analog corrected signal and outputs a modulated signal. Next, a first, second, and third desired component measures and a first, second, and third image component measures with the first, second and third sets of the correction parameters Apand Bpare respectively obtained from the modulated signal. Next, a fourth and fifth set of correction parameters Apand Bpare obtained based on the first, the second, and the third desired component measures as well as the first, the second, and the third image component measures. Next, a fourth desired component measure and a fourth image component measure with the fourth set of correction parameters Apand Bpand a fifth desired component measure and a fifth image component measure with the fifth set of correction parameters Apand Bpare obtained from the modulated signal. Finally, a final set of the correction parameters Apand Bpare selected from the fourth and fifth sets of correction parameters.

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