Pulse or digital communications – Transmitters
Reexamination Certificate
2011-03-22
2011-03-22
Fan, Chieh M. (Department: 2611)
Pulse or digital communications
Transmitters
C375S302000
Reexamination Certificate
active
07912145
ABSTRACT:
In some exemplary embodiments of the invention, a transfer function of a filter for a fractional-N sigma-delta modulator may be calculated to be optimized according to predefined optimization criteria. For example, the optimization criteria may include spectral cleanliness at the output of the modulator, or the mean squared error of the input to the filter and the input to a voltage controlled oscillator of the fractional-N phase locked loop (PLL). In some exemplary embodiments, the filter may be adjusted to compensate for variations and/or impairments in the analog fractional-N PLL. A non-exhaustive list of examples for the transfer function includes a finite impulse response and an infinite impulse response.
REFERENCES:
patent: 3777275 (1973-12-01), Cox
patent: 4063199 (1977-12-01), Oursler, Jr.
patent: 4433312 (1984-02-01), Kahn
patent: 4439744 (1984-03-01), Kumar et al.
patent: 5012200 (1991-04-01), Meinzer
patent: 5264807 (1993-11-01), Okubo et al.
patent: 5295162 (1994-03-01), Zarembowitch
patent: 5302914 (1994-04-01), Arntz et al.
patent: 5345189 (1994-09-01), Hornak et al.
patent: 5420541 (1995-05-01), Upton et al.
patent: 5541554 (1996-07-01), Stengel et al.
patent: 5548246 (1996-08-01), Yamamoto et al.
patent: 5568094 (1996-10-01), Bowen et al.
patent: 5621351 (1997-04-01), Puri et al.
patent: 5661434 (1997-08-01), Brozovich et al.
patent: 5694093 (1997-12-01), DaSilva et al.
patent: 5724005 (1998-03-01), Chen et al.
patent: 5739723 (1998-04-01), Sigmon et al.
patent: 5758269 (1998-05-01), Wu
patent: 5786727 (1998-07-01), Sigmon
patent: 5786728 (1998-07-01), Alinikula
patent: 5854571 (1998-12-01), Pinckley et al.
patent: 5862460 (1999-01-01), Rich
patent: 5872481 (1999-02-01), Sevic et al.
patent: 5880633 (1999-03-01), Leizerovich et al.
patent: 5886575 (1999-03-01), Long
patent: 5901346 (1999-05-01), Stengel et al.
patent: 5903854 (1999-05-01), Abe et al.
patent: 5909643 (1999-06-01), Aihara
patent: 5929702 (1999-07-01), Myers et al.
patent: 5974041 (1999-10-01), Kornfeld et al.
patent: 6008703 (1999-12-01), Perrott et al.
patent: 6047029 (2000-04-01), Eriksson et al.
patent: 6101224 (2000-08-01), Lindoff et al.
patent: 6133788 (2000-10-01), Dent
patent: 6147653 (2000-11-01), Wallace et al.
patent: 6181920 (2001-01-01), Dent et al.
patent: 6201452 (2001-03-01), Dent et al.
patent: 6271782 (2001-08-01), Steensgaard-Madsen
patent: 6285251 (2001-09-01), Dent et al.
patent: 6330455 (2001-12-01), Ichihara
patent: 6490440 (2002-12-01), Mielke et al.
patent: 6587511 (2003-07-01), Barak et al.
patent: 6633199 (2003-10-01), Nielsen et al.
patent: 6636112 (2003-10-01), McCune
patent: 6754287 (2004-06-01), Underbrink et al.
patent: 6825719 (2004-11-01), Barak et al.
patent: 2003/0078016 (2003-04-01), Groe et al.
patent: 2003/0123566 (2003-07-01), Hasson
patent: 2003/0125065 (2003-07-01), Hasson et al.
patent: 2003/0206056 (2003-11-01), Hietala
patent: 2004/0041638 (2004-03-01), Vilcocq et al.
patent: 2005/0058219 (2005-03-01), Liu
patent: 2007/0036238 (2007-02-01), Matero et al.
patent: WO 99/52206 (1999-10-01), None
U.S. Appl. No. 10/131,750, filed Apr. 24, 2002, Barak et al.
Fredrick H. Raab, “Efficiency of Outphasing RF Power-Amplifier Systems”, IEEE Transactions on Communications. vol. Com-33, No. 10, Oct. 1985, pp. 1094-1099.
Steve C. Cripps, “RF Power Amplifiers for Wireless Communications”, 1999, USA, pp. 219-250.
D.C. Cox, “Linear Amplification with Nonlinear Components”, IEEE Transaction on Communications, Dec. 1974, pp. 1942-1945.
Bob Stengel and William R. Eisenstadt, “LINC Power Amplifier Combiner Method Efficiency Optimization”, IEEE Transaction on Vehicular Technology. vol. 49, No. 1, Jan. 2000, pp. 229-234.
Bob Stengel, “LINC Linear Transmitter Technology Review”, Presented at International Microwave Symposium, Boston, MA, Jun. 11, 2000, pp. 1-32.
S.A. Hetzel et al., “A LINC Transmitter”, University of Bristol, IEEE, 1999, pp. 133-137.
S. O. Ampem-Darko, H.S. Al-Raweshidy, “A Novel Technique for Gain/Phase Error Cancellation in LINC Transmitters”, 1999 IEEE , pp. 2034-2038.
T.A. D. Riley and M. A. Copeland, “A simplified continuous phase modulator technique,” IEEE Trans. on circuits and systems, vol. 41, No. 5, pp. 321-328, May 1994.
N. M. Filiol, T. A. D. Riley, C. Plett and M. A. Copeland, “An agile ISM band frequency synthesizer with built-in GMSK data modulation,” IEEE Journal of Solid-State Circuits, vol. 33, No. 7, pp. 998-1008, Jul. 1998.
T. Yamaji, A. Yasuda, H. Tanimoto, Y. Suzuki, “A Digital-to-RF Converter Architecture Suitable for a Digital-to-RF Direct-Conversion Software Defined Radio Transmitter”, IEICE Trans. Commun., vol. E83-B, No. 6, pp. 1254-1260, Jun. 2000.
J. Nieznanski, “Performance characterization of vector sigma-delta modulation”, IECON '98, Proceedings of the 24th Annual Conference of the IEEE, vol. 1, pp. 531-536, 1998.
Zhang et al., “Multibit Oversampled Sigma—Delta A/D Convertor with Nonuniform Quantisation”, Electronics Letters, Mar. 14, 1991, UK, vol. 27, No. 6, pp. 528-529.
D.L. Neuhoff, “Polar quantization revisited”, IEEE International Symposium on Information Theory, 1997 Proceedings, pp. 60, 1997.
N.O. Sokal, “RF Power Amplifiers, Classes A through S—How they operate, and when to use each”, Electronics Industries Forum of New England, Professional Program Proceedings, pp. 179-183, 1997.
Perrott et al., “27-MW CMOS Fractional-N Synthesizer Using Digital Compensation for 2.5-MB/S GFSK Modulation”, IEEE Journal of Solid-State Circuits, IEEE Inc., New York. USA, vol. 32, No. 12, Dec. 1, 1997, pp. 2048-2080.
M. H. Perrott, “Techniques for High Data Rate modulation and Low Power Operation of Fractional-N Frequency Synthesizers”, PH.D Disseration, MIT, Sep. 1997, Retrieved from the Internet, URL:http://www-mtl.mIt.edu/(perrott/pages/thesis.pdf/, pp. 1-90.
International Search Report from PCT/US2004/010959, mailed on Oct. 7, 2004.
Michael H. Perrott et al., “A Modeling Approach for Σ-Δ Fractional-NFrequency Synthesizers Allowing Straightforward Noise Analysis”, IEEE Journal of Solid-State Circuits, vol. 37, No. 8, Aug. 2002, pp. 1028-1038.
“Parallelism exploitation is SAR data compression methods”, Beatriz Botero, Nourredine Hifdi, EUSAR 2000, Munich, Allemagne, May 23-25, 2000.
Peric et al., “Design of Signal Constellations for Gaussian Channel by Using Iterative Polar Quantization”, Electrotechnical Conference, 1998 MELECON 98., 9th Mediterranean, vol. 2, May 18-20, 1998 pp. 866-869 vol. 2 Digital Object Identifier.
Pick Kobby
Yellin Daniel
Aghdam Freshteh N
Fan Chieh M.
Marvell World Trade Ltd.
LandOfFree
Filter for a modulator and methods thereof does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Filter for a modulator and methods thereof, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Filter for a modulator and methods thereof will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2778828