Pulse or digital communications – Transmitters – Antinoise or distortion
Reexamination Certificate
2005-12-06
2005-12-06
Fan, Chieh M. (Department: 2638)
Pulse or digital communications
Transmitters
Antinoise or distortion
C375S296000, C455S063100, C455S114300
Reexamination Certificate
active
06973138
ABSTRACT:
The present invention is related to methods and apparatus that advantageously permit the more efficient use of an input range of an analog-to-digital converter used by an adaptive predistortion linearized RF transmitter. A main signal component of a down-converted output of an RF transmitter is removed prior to the analog-to-digital conversion of the down-converted output, thereby allowing more of the input range of the analog-to-digital converter to capture an error signal component of the down-converted output. Embodiments of the present invention can thus adaptively tune the predistortion stage to a higher degree of linearity or can use lower cost analog-to-digital converters with fewer quantization steps for the same performance.
REFERENCES:
patent: 4291277 (1981-09-01), Davis et al.
patent: 4329655 (1982-05-01), Nojima et al.
patent: 4700151 (1987-10-01), Nagata
patent: 4810977 (1989-03-01), Flugstad et al.
patent: 5049832 (1991-09-01), Cavers
patent: 5089782 (1992-02-01), Pike et al.
patent: 5093667 (1992-03-01), Andricos
patent: 5675285 (1997-10-01), Winters
patent: 5682336 (1997-10-01), Chian et al.
patent: 5699383 (1997-12-01), Ichiyoshi
patent: 5818298 (1998-10-01), Dent et al.
patent: 5842140 (1998-11-01), Dent et al.
patent: 5900778 (1999-05-01), Stonick et al.
patent: 5905760 (1999-05-01), Schnabl et al.
patent: 5990738 (1999-11-01), Wright et al.
patent: 3307309 (1984-09-01), None
patent: 0544117 (1992-10-01), None
patent: 0881807 (1993-06-01), None
patent: 2282291 (1995-03-01), None
A. Bateman, D.M. Haines and R.J. Wilkinson, “Linear Transceiver Architectures,” 38thIEEE Vehicular Technology Conference, Philadelphia, PA, pp. 478-484, dated Jun. 15-17, 1988.
R.D. Stewart and F.F. Tusubira, “Feedforward Linearisation of 950 MHz Amplifiers,” IEE Proceedings, vol. 135, Pt. H, No. 5, pp. 347-350, dated Oct. 1988.
J.K. Cavers, “Amplifier Linearization Using a Digital Predistorter with Fast Adaptation and Low Memory Requirements,” IEEE Transactions on Vehicular Technology, vol. 39, No. 4, pp. 374-382, dated Nov. 1990.
Y. Nagata, “Linear Amplification Technique for Digital Mobile Communications,” IEEE Transactions on Vehicular Technology, pp. 159-164, (1989).
E.A. Lee and D.G. Messerschmitt, “Digital Communication,” Kluwer Academic Publishers, Chapter 15, pp. 566-569, (1990).
A.A.M. Saleh and J.Salz, “Adaptive Linearization of Power Amplifiers in Digital Radio Systems,” The Bell System Technical Journal, vol. 62, No. 4, pp. 1019-1033, dated Apr. 1983.
Andrew S. Wright and Willem G. Durtler, “Experimental Performance of an Adaptive Digital Linearized Power Amplifier,” IEEE Transactions on Vehicular Technology, vol. 41, No. 4, pp. 395-400, dated Nov. 1992.
J. K. Cavers, “The Effect of Quadrature Modulator and Demodulator Errors on Adaptive Digital Predistorters for Amplifier Linearization,” IEEE Transactions on Vehicular Technology, vol. 46, No. 2, pp. 456-466, May 1997.
L. Sundstrom, M. Faulkner, and M. Johansson, “Quantization Analysis and Design of A Digital Predistortion Linearizer for RF Power Amplifiers,” IEEE Transactions on Vehicular Technology, vol. 45, No. 4, pp. 707-719, dated Nov. 1996.
M. Faulkner and M. Johansson, “Adaptive Linearization Using Predistortion—Experimental Results,” IEEE Transactions on Vehicular Technology, vol. 43, No. 2, pp. 323-332, dated May 1994.
J. K. Cavers, “A Linearizing Predistorter with Fast Adaptation,” 40th IEEE Vehicular Technology Conference, pp. 41-47, dated May 1990.
International Search Report for PCT Application No. PCT/IB/00/01038.
International Search Report for PCT Application No. PCT/IB/00/01044.
International Search Report for PCT Application No. PCT/IB/00/01047.
International Search Report for PCT Application No. PCT/IB/00/01049.
International Search Report for PCT Application No. PCT/IB/00/01051.
Fan Chieh M.
Knobbe Martens Olson & Bear LLP
PMC-Sierra Inc.
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