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

2006-10-17

2006-10-17

Vuong, Quochien B. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S334000, C375S316000

Reexamination Certificate

active

07123896

ABSTRACT:
A method for I/Q mismatch calibration in a receiver. The receiver has an I/Q correction module using parameters Apand Bp. The method comprises the steps of generating an analog test signal x(t), applying I/Q demodulation to reduce the central frequency of the signal x(t) by fcHz and outputting a demodulated signal xdem(t), converting the analog signal xdem(t) to a digital signal xdem[n], sending the signal xdem[n] into the I/Q correction module using parameters Apand Bpand outputting a corrected signal w[n], obtaining two measures U1and U2of the corrected signal w[n], and updating the parameters Apand Bpof the I/Q correction module respectively by a first and second function of the two measures U1and U2, and the current values of the parameters Apand Bp.

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: 2005/0047536 (2005-03-01), Wu et al.

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