Self-calibrating multi-port circuit and method

Details Self-calibrating multi-port circuit and method Self-calibrating multi-port circuit and method

2007-02-06

2010-10-26

Puente, Eva Y (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S141000, C375S146000, C375S295000, C375S297000, C341S118000, C341S144000, C341S143000

Reexamination Certificate

active

07822147

ABSTRACT:
The invention provides a type-based method to compensate for distortions in circuits operating on a plurality of input modulated signals to form one or more output modulated signals. Steps of the method include low-rate sampling of the output signal to obtain a statistical characteristics thereof, and adjusting parameters of the circuit to introduce a controlled degree of cross-coupling between the signals until the statistical characteristics of the output signal approximates a reference characteristics defined by the used modulation formats. Another aspect of the invention provides a self-calibrating multi-port circuit implementing the method.

REFERENCES:
patent: 5293406 (1994-03-01), Suzuki
patent: 5387883 (1995-02-01), Ueda
patent: 5784030 (1998-07-01), Lane et al.
patent: 5966312 (1999-10-01), Chen
patent: 6661284 (2003-12-01), Luz et al.
patent: 6760567 (2004-07-01), Jeong et al.
patent: 6771709 (2004-08-01), Huang et al.
patent: 6885241 (2005-04-01), Huang et al.
patent: 7382297 (2008-06-01), Kopikare et al.
patent: 7471736 (2008-12-01), Ding et al.
patent: 2002/0181611 (2002-12-01), Kim
patent: 2003/0184374 (2003-10-01), Huang et al.
patent: 2004/0082300 (2004-04-01), Scheck
patent: 2005/0118963 (2005-06-01), Chiu
patent: 1125644 (2001-08-01), None
patent: WO 02/052792 (2002-07-01), None
Cavers, “A Fast Method for Adaptation of Quadrature Modulators and Demodulators in Amplifier Linearization Circuits” Proc. Of IEEE Vehicular Technology Conf. Atlanta, Apr. 28-May 1, 1996; vol. II, pp. 1307-1311.
Datta et al, “Direct Modulation at L-bank Using a Quadrature Modulator with Feedback”, Proc. Of the 4thInt'l Mobile Satellite Conf.—IMSC'95, Jun. 6-8, 1995, Ottawa, Canada.
Cavers et al, “Adaptive Compensation for Imbalance and Offset Losses in Direct Conversion Transceivers”, IEEE Trans. On Vehicular Technology, vol. 42, No. 4, Nov. 1993, pp. 581-588.
Faulkner et al, Automatic Adjustment of Quadrature Modulators, Electronics Ltrs, vol. 27, No. 3, Jan. 31, 1991, pp. 214-216.
Starski, “Calibration Block for Digital Beam Forming Antenna”, Antennas and Propagation Society Inter'l Symposium, vol. 4, Jun. 18-23, 1995, pp. 1978-1981.
Scott et al, “The Effect of Reconstruction Filters on Direct Upconversion in a Multichannel Environment”, IEEE Trans. On Vehicular Technology, vol. 44, No. 1 Feb. 1995, pp. 95-102.
Qiming et al, “Improvement of Digital Mapping Predistorters for Linearising Transmitters”, 1997 IEEE-MTT-S Proceedings, Jun. 8-13, 1997, vol. III, pp. 1691-1694.
Marchesani, “Digital Precompensation of Imperfections in Quadrature Modulators”, IEEE Trans. On Comm. vol. 48, No. 4, Apr. 2000, pp. 552-556.
Cover et al, “Elements of Information Theory”, John Wiley & Sons, Inc., NY 1991, pp. 279-335.

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