Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2007-07-31
2007-07-31
Payne, David C. (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C327S133000, C327S140000, C332S160000, C375S297000, C398S159000, C398S193000, C455S069000, C455S114300, C455S126000
Reexamination Certificate
active
10321011
ABSTRACT:
A bank of complex gain elements is used to provide a step-wise approximation of an arbitrary complex-gain predistortion function for a nonlinear transmitter. The bank of gain elements is in an adaptive loop realizing adaptive control. The adaptive loop is closed between an Input of the gain bank and an output of the transmitter through a linear receiver at an adaptive controller composed of a bank of proportional-integral (PI) controllers. The real and imaginary parts of each predistortion gain element are controlled by a corresponding adaptive PI controller. The signals processed by the adaptive controller are represented in orthogonal coordinates in terms of real and imaginary number pairs of complex numbers. The adaptive controller achieves unconditionally stable operation independently from the arbitrary phase rotation in the input signal or the adaptive loop.
REFERENCES:
patent: 4577334 (1986-03-01), Boer et al.
patent: 4717894 (1988-01-01), Edwards et al.
patent: 5113414 (1992-05-01), Karam et al.
patent: 5119399 (1992-06-01), Santos et al.
patent: 5371481 (1994-12-01), Tiittanen et al.
patent: 6133789 (2000-10-01), Braithwaite
patent: 6147553 (2000-11-01), Kolanek
patent: 6169463 (2001-01-01), Mohindra et al.
patent: 6208698 (2001-03-01), Marchesani et al.
patent: 6298096 (2001-10-01), Burgin
Anit Lohita, Paul Goud, Colin Englefield; Power Amplifier Linearization using Cubic Spline Interpolation; May 18-20, 1993; IEEE Vehicular Technology Conference; pp. 676-679 □□.
Jones, A.E., Gardiner, J. G.; Phase error correcting vector modulator for personal communications network (PCN) transceivers; Jul. 4, 1991; Elecrtronics Letters, vol. 27, issue 14; pp. 1230-1231 □□□□.
Sano et al; Identification of Hammerstein-Wiener system with application to compensation for nonlinear distortion; SICE 2002. Proceedings of the 41st SICE Annual Conference; vol. 3, Aug. 5-7, 2002; pp. 1521-1526.
Leskiw Christopher John
Rashev Peter Zahariev
Tholl David M.
DSouza Adolf
Nortel Networks Limited
Payne David C.
Schwegman Lundberg Woessner & Kluth P.A.
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