Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2006-02-14
2006-02-14
Phu, Phuong (Department: 2631)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S297000
Reexamination Certificate
active
06999523
ABSTRACT:
A multi frequency carrier transmitter comprises input means for receiving a plurality of different digital signals to be transmitted. The different signals are to be transmitted on different carrier frequencies. Amplifier means receive a composite signal comprising the different signals at the respective carrier frequencies and amplify the composite signal. Predistortion means predistort the plurality of digital signals prior to amplification of the composite signal by the amplification means. The predistortion provided by the predistortion means is subsequently altered in dependence on the difference between the input signals and the output at the amplifier means.
REFERENCES:
patent: 5530920 (1996-06-01), Takeda
patent: 5598436 (1997-01-01), Brajal et al.
patent: 5937011 (1999-08-01), Carney et al.
patent: 6075411 (2000-06-01), Briffa et al.
patent: 6104241 (2000-08-01), Cova et al.
patent: 6188732 (2001-02-01), Rha
patent: 6275685 (2001-08-01), Wessel et al.
patent: 6400774 (2002-06-01), Matsuoka et al.
patent: 2001/0014592 (2001-08-01), Helms
patent: 0891041 (1999-01-01), None
patent: 7-283743 (1994-10-01), None
patent: WO 94/17599 (1994-08-01), None
patent: WO 96/12343 (1996-04-01), None
patent: WO 97/30521 (1997-08-01), None
Mats Johansson and Michael Faulkner; “Linearization of Wideband RF Power Amplifiers.” .
M. Johansson and L. Sundstrom; “Linearisation of RF multicarrier amplifiers using Cartesian feedback”, Electronic Letters, Jul. 7, 1994, vol. 30, No. 14, pp. 1110-1111.
Mats Johansson, Thomas Mattsson, Lars Sundstrom and Michael Faulkner; “Linearization of Multi-carrier Power Amplifiers”, 1993 43rdVehicular Technology Conference, pp., 684-687.
“Digital Modulation in Communications Systems—An Introduction”, Application Note 1298, Hewlettett-Packard Company, USA Jul./1997, pp. 1-48.
Nokia Corporation
Phu Phuong
Squire Sanders & Dempsey L.L.P.
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