Method and apparatus for I/Q mismatch calibration in a receiver

Details Method and apparatus for I/Q mismatch calibration in a receiver Method and apparatus for I/Q mismatch calibration in a receiver

2007-02-06

2007-02-06

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Noise or interference elimination

C455S303000, C455S313000

Reexamination Certificate

active

10653300

ABSTRACT:
A method for I/Q mismatch calibration of a receiver having an I/Q correction module with correction parameters, comprising the steps of generating a test signal containing a single tone waveform with frequency of a carrier frequency plus a predetermined frequency, applying I/Q demodulation to reduce the central frequency of the test signal and outputting a demodulated signal, converting the demodulated signal to a digital signal, obtaining measures of the digital signal respectively indicative of the frequency response of the digital signal at the plus and minus predetermined frequencies, and calculating the set of the correction parameters for the I/Q correction module based on the measures.

REFERENCES:
patent: 5949821 (1999-09-01), Emami et al.
patent: 6122325 (2000-09-01), Mogre et al.
patent: 6330290 (2001-12-01), Glas
patent: 2003/0095589 (2003-05-01), Jeong
patent: 2005/0026577 (2005-02-01), Chiu

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