Telecommunications – Transmitter – Noise or interference elimination
Reexamination Certificate
2007-04-30
2011-11-22
Le, Lana N (Department: 2618)
Telecommunications
Transmitter
Noise or interference elimination
C330S149000, C375S296000, C375S297000
Reexamination Certificate
active
08064850
ABSTRACT:
An embodiment of the invention uses a predistortion correction signal to combination the modulated RF signal by an analog multiplier for linearization of power amplifiers having nonlinear characteristics such as those used in wireless RF transmitters. A predistortion controller comprises a plurality of down converters for retrieving both the ideal non-distorted information and the feedback distorted information, together with pre-stored digitally-indexed predistortion information stored, for example, in a look-up table. The digitally-indexed information models nonlinear characteristics of the high power amplifier, and is stored prior to processing of pre-compensation in the power amplifier. When the predistortion information is combined with the modulated RF signal in the analog multiplier, the result is a substantially linear information transmission from the power amplifier. In an embodiment of the system, the modulated RF input signal and the feedback signal from PA output are down-converted, respectively, by analog devices, such as mixers, after which the analog intermediate frequency (IF) signals are digitized by analog-to-digital converters for digital predistortion correction processing, followed by predistortion processing performed by, for example, a DSP or FPGA chip to generate a digital correction control signal, which is then converted to an analog signal by a digital-to-analog converter, followed by combining the analog correction signal with the RF modulated input signal to yield the input to the power amplifier.
REFERENCES:
patent: 4638248 (1987-01-01), Schweickert
patent: 4700151 (1987-10-01), Nagata
patent: 4890300 (1989-12-01), Andrews
patent: 4929906 (1990-05-01), Voyce et al.
patent: 5049832 (1991-09-01), Cavers
patent: 5121412 (1992-06-01), Borth
patent: 5132639 (1992-07-01), Blauvelt et al.
patent: 5396190 (1995-03-01), Murata
patent: 5486789 (1996-01-01), Palandech et al.
patent: 5579342 (1996-11-01), Crozier
patent: 5675287 (1997-10-01), Baker et al.
patent: 5678198 (1997-10-01), Lemson
patent: 5699383 (1997-12-01), Ichiyoshi
patent: 5732333 (1998-03-01), Cox et al.
patent: 5757229 (1998-05-01), Mitzlaff
patent: 5786728 (1998-07-01), Alinikula
patent: 5870668 (1999-02-01), Takano et al.
patent: 5936464 (1999-08-01), Grondahl
patent: 5937011 (1999-08-01), Carney et al.
patent: 5949283 (1999-09-01), Proctor et al.
patent: 5959499 (1999-09-01), Khan et al.
patent: 5963549 (1999-10-01), Perkins et al.
patent: 6054896 (2000-04-01), Wright et al.
patent: 6055418 (2000-04-01), Harris et al.
patent: 6081158 (2000-06-01), Twitchell et al.
patent: 6091941 (2000-07-01), Moriyama et al.
patent: 6240144 (2001-05-01), Ha
patent: 6242979 (2001-06-01), Li
patent: 6246286 (2001-06-01), Persson
patent: 6246865 (2001-06-01), Lee
patent: 6275685 (2001-08-01), Wessel et al.
patent: 6400774 (2002-06-01), Matsuoka et al.
patent: 6424225 (2002-07-01), Choi et al.
patent: 6512417 (2003-01-01), Booth et al.
patent: 6552634 (2003-04-01), Raab
patent: 6625429 (2003-09-01), Yamashita
patent: 6639050 (2003-10-01), Kieliszewski
patent: 6677870 (2004-01-01), Im et al.
patent: 6697436 (2004-02-01), Wright et al.
patent: 6703897 (2004-03-01), O'Flaherty et al.
patent: 6741663 (2004-05-01), Tapio et al.
patent: 6751447 (2004-06-01), Jin et al.
patent: 6963242 (2005-11-01), White et al.
patent: 6983025 (2006-01-01), Schell
patent: 6985704 (2006-01-01), Yang et al.
patent: 7035345 (2006-04-01), Jeckeln et al.
patent: 7042287 (2006-05-01), Robinson
patent: 7061314 (2006-06-01), Kwon et al.
patent: 7064606 (2006-06-01), Louis
patent: 7079818 (2006-07-01), Khorram
patent: 7102442 (2006-09-01), Anderson
patent: 7103329 (2006-09-01), Thon
patent: 7104310 (2006-09-01), Hunter
patent: 7106806 (2006-09-01), Kenington
patent: 7109792 (2006-09-01), Leffel
patent: 7151913 (2006-12-01), Ahmed
patent: 7158765 (2007-01-01), Blair et al.
patent: 7193472 (2007-03-01), Gotou et al.
patent: 7248642 (2007-07-01), Vella-Coleiro
patent: 7259630 (2007-08-01), Bachman et al.
patent: 7321635 (2008-01-01), Ocenasek et al.
patent: 7321636 (2008-01-01), Harel et al.
patent: 7372918 (2008-05-01), Muller et al.
patent: 7469491 (2008-12-01), McCallister et al.
patent: 7831221 (2010-11-01), Leffel et al.
patent: 2002/0034260 (2002-03-01), Kim
patent: 2002/0044014 (2002-04-01), Wright et al.
patent: 2002/0080891 (2002-06-01), Ahn et al.
patent: 2002/0101937 (2002-08-01), Antonio et al.
patent: 2002/0101938 (2002-08-01), Horaguchi et al.
patent: 2002/0179830 (2002-12-01), Opas et al.
patent: 2002/0187761 (2002-12-01), Im et al.
patent: 2002/0193085 (2002-12-01), Mathe et al.
patent: 2003/0095608 (2003-05-01), Duperray
patent: 2003/0179829 (2003-09-01), Pinckley et al.
patent: 2003/0179830 (2003-09-01), Eidson et al.
patent: 2003/0207680 (2003-11-01), Yang et al.
patent: 2004/0017859 (2004-01-01), Sills et al.
patent: 2004/0240585 (2004-12-01), Bishop et al.
patent: 2005/0079834 (2005-04-01), Maniwa et al.
patent: 2005/0159117 (2005-07-01), Bausov et al.
patent: 2005/0262498 (2005-11-01), Ferguson et al.
patent: 2006/0012426 (2006-01-01), Nezami
patent: 2006/0046665 (2006-03-01), Yang et al.
patent: 2006/0270366 (2006-11-01), Rozenblit et al.
patent: 2007/0075780 (2007-04-01), Krvavac et al.
patent: 2007/0241812 (2007-10-01), Yang et al.
Yang Dali
Yang Jia
Dali Systems Co., Ltd.
Kilpatrick Townsend & Stockton LLP
Le Lana N
Sorowar Golam
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