Telecommunications – Transmitter – Measuring – testing – or monitoring of transmitter
Reexamination Certificate
2005-12-09
2010-06-08
Nguyen, Duc (Department: 2618)
Telecommunications
Transmitter
Measuring, testing, or monitoring of transmitter
C455S067140, C455S102000
Reexamination Certificate
active
07734261
ABSTRACT:
The object of the invention, which relates to a method and an arrangement for calibrating an analog I/Q modulator in a high-frequency transmitter, is to provide a method and an associated circuit arrangement by means of which a calibration of the I/Q modulator is carried out without a balancing operation and thus the complexity is minimized. According to the invention, this object is achieved, in terms of the method, in that transmission signals are produced by the I/Q modulator in three method steps in accordance with the method and said transmission signals are in each case evaluated and the results of the evaluations are stored, in that, in a fourth method step, improved compensation coefficients are calculated on the basis of the results of the previous evaluations, which improved compensation coefficients can be used for a subsequent run-through of the method, and in that the run-throughs of the method are repeated until the error of the amplitude and/or phase response of the I/Q modulator lies below a defined threshold value or a defined number of run-throughs of the method is reached.
REFERENCES:
patent: 6393258 (2002-05-01), Gambina et al.
patent: 6704551 (2004-03-01), Riou et al.
patent: 2003/0095607 (2003-05-01), Huang et al.
patent: 2004/0162038 (2004-08-01), Kanazawa
patent: 5-136836 (1993-06-01), None
patent: 2000-124964 (2000-04-01), None
patent: 2000-244596 (2000-09-01), None
patent: 2001-44762 (2001-02-01), None
patent: 2003-249822 (2003-05-01), None
patent: 2004-15310 (2004-01-01), None
patent: 2004/095686 (2004-11-01), None
patent: 2004/095686 (2004-11-01), None
Yang, G; et al “I/Q Modulator Image Rejection Through Modulation Pre-Distortion” Vehicular Technology for the Human Race. IEEE. vol. 2, Apr. 28, 1996, pp. 1317-1320.
Cavers, James K. “New Methods for Adaptation of Quadrature Modulators and Demodulators in Amplifier Linearization Circuits” IEEE Transactions on Vehicular Technology, vol. 46, No. 3, Aug. 1997, pp. 707-716.
Akinyemi Ajibola
Nguyen Duc
NXP B.V.
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