Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2008-03-27
2010-12-21
Bocure, Tesfaldet (Department: 2611)
Pulse or digital communications
Transmitters
Antinoise or distortion
C332S123000
Reexamination Certificate
active
07856069
ABSTRACT:
A distortion compensation apparatus includes an amplifier for amplifying an input signal, a calculation unit for obtaining a distortion compensation coefficient of the amplifier corresponding to an amplitude level of the input signal, based on the input signal input to the amplifier and an output signal output from the amplifier, a memory for storing the distortion compensation coefficient, obtained by the calculation unit, into a write address being made to correspond to the input signal amplitude level, a distortion compensation processing unit for reading out the distortion compensation coefficient from the readout address of the memory, and for performing distortion compensation processing of the input signal using the distortion compensation coefficient, and an address generator for generating the write address and the readout address, based on the input signal amplitude level.
REFERENCES:
patent: 5870668 (1999-02-01), Takano et al.
patent: 5898338 (1999-04-01), Proctor et al.
patent: 6836517 (2004-12-01), Nagatani et al.
patent: 7430250 (2008-09-01), Shako et al.
patent: 7486744 (2009-02-01), Shako et al.
patent: 7613251 (2009-11-01), Shako et al.
patent: 2001/0005402 (2001-06-01), Nagatani et al.
patent: 2003/0118125 (2003-06-01), Doi
patent: 2005/0009479 (2005-01-01), Braithwaite
patent: 2005/0226346 (2005-10-01), Ode et al.
patent: 2009/0227216 (2009-09-01), Lozhkin
patent: 9-69733 (1997-03-01), None
patent: 2000-278190 (2000-10-01), None
patent: 3187251 (2001-05-01), None
patent: 2001-189685 (2001-07-01), None
patent: 2002-223171 (2002-08-01), None
patent: 2003-188656 (2003-07-01), None
patent: 2003-347944 (2003-12-01), None
patent: 2005026998 (2005-01-01), None
Supplementary European Search Report dated Sep. 30, 2008 issued in corresponding European Application No. 05787565.0-1233.
Notification of Reason for Rejection dated Jun. 29, 2010, from the corresponding Japanese Patent application No. 2007-537490.
Fudaba Nobukazu
Hamada Hajime
Ishikawa Hiroyoshi
Kubo Tokuro
Nagatani Kazuo
Bocure Tesfaldet
Fujitsu Limited
Hanify & King P.C.
LandOfFree
Distortion compensation apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Distortion compensation apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Distortion compensation apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4167075