Amplifiers – Hum or noise or distortion bucking introduced into signal...
Reexamination Certificate
2006-09-26
2006-09-26
Nguyen, Patricia (Department: 2817)
Amplifiers
Hum or noise or distortion bucking introduced into signal...
C330S075000, C375S296000, C455S092000
Reexamination Certificate
active
07113037
ABSTRACT:
Estimating non-linearity of a power amplifier includes receiving signals at a first location. The signals include an input signal, a pre-distorted signal, and an output signal. The output signal exhibits distortion, including a non-linearity effect, with respect to the input signal. The power amplifier is located at a second location remote from the first location. The non-linearity of the power amplifier is estimated in accordance with the signals at the first location using an inverse model. Pre-distortion information is calculated according to the estimated non-linearity using the inverse model. The pre-distortion information is sent to a pre-distorter at the second location, where the pre-distorter can reduce the non-linearity effect using the pre-distortion information.
REFERENCES:
patent: 4462001 (1984-07-01), Girard
patent: 4701717 (1987-10-01), Radermacher et al.
patent: 5872814 (1999-02-01), McMeekin
patent: 5900778 (1999-05-01), Stonick et al.
patent: 5923714 (1999-07-01), Hwang
patent: 5937011 (1999-08-01), Carney et al.
patent: 6072364 (2000-06-01), Jeckeln et al.
patent: 6141390 (2000-10-01), Cova
patent: 6205170 (2001-03-01), De Santos et al.
patent: 6285859 (2001-09-01), Durán et al.
patent: 6314142 (2001-11-01), Perthold et al.
patent: 6351677 (2002-02-01), Leyonhjelm et al.
patent: 6400775 (2002-06-01), Gourgue et al.
patent: 6459334 (2002-10-01), Wright et al.
patent: 6498529 (2002-12-01), Kim et al.
patent: 6504425 (2003-01-01), Kim
patent: 6614854 (2003-09-01), Chow et al.
patent: 6931080 (2005-08-01), Giardina et al.
patent: WO 01/05026 (2001-01-01), None
patent: WO 03/043182 (2003-05-01), None
Bösch, Wolfgang, et al., “Measurement and Simulation of Memory Effects in Predistortion Linearizers,” IEEE Transactions on Microwave Theory and Techniques, vol. 37, No. 12, © 1989 IEEE, pp. 1885-1890, Dec. 1989.
Yao, L., et al., “Identification of a Nonlinear System Modeled by a Sparse Volterra Series,” IEEE International Conference on Systems Engineering, Kobe, Japan, IEEE Catalog No.: 92CH3179-9, © 1992 IEEE, pp. 624-627 plus cover sheet, Sep. 17-19, 1992.
Kenney, J.S., et al., “The Impact of Memory Effects on Predistotion Linearization of RF Power Amplifiers,” ISMOT-2001, Proc. 8th Int. Microwave Opt. Technol. Symp., Montreal, Canada, pp. 189-193 plus cover sheet, Jun. 19-23, 2001.
Vuolevi, Joel H.K., et al., “Measurement Technique for Characterizing Memory Effects in RF Power Amplifiers,” IEEE Transactions on Microwave Theory and Techniques. vol. 49, No. 8, pp. 1383-1389, Aug. 2001.
McBeath, S.M., “W-CDMA Power Amplifier Modeling,” IEEE 54th Vehicular Technology Conference, VTC Fall 2001 Proceedings, vol. 4—Poster Sessioins, Atlantic City, New Jersey, © 2001 IEEE, pp. 2243-2247 pplus cover sheet, Fall 2001.
Ku, Hyunchul, et al., “Quantifying Memory Effects in RF Power Amplifiers,” IEEE Transactions on Microwave Theory and Techniques. vol. 50, No. 12, pp. 2843-2849, Dec. 2002.
Nizamuddin, Muhammad A., “Nonlinear Tapped Delay Line Digital Predistorter for Power Amplifiers with Memory,” 2003 IEEE Wireless Communications and Networking Conference Record, New Orleans, Louisiana, © 2003 IEEE, pp. 607-611 plus cover sheet, Mar. 16-20, 2003.
Ding, L., et al., “A Robust Digital Baseband Predistorter Constructed Using Memory Polynomials,” IEEE Transactions on Communications, vol. 52, No. 1, pp. 159-165, Jan. 2004.
Patent Application filed Jul. 14, 2004, by inventor Mohamed K. Nezami, entitled “Estimating Power Amplifier Non-Linearity In Accordance With Memory Depth,” 43 total pages, Jul. 14, 2004.
Changsoo Eun, et al., “A Predistorter Design for a Memory-less Nonlinearity Preceded by a Dynamic Linear System”, ISBN: 0-7803-2509-5, © 1995 IEEE, pp. 152-156.
Hyun Woo Kang, et al., “An Efficient Adaptive Predistorter for Nonlinear High Power Amplifier in Satellite Communication,” 1997 IEEE International Symposium on Circuits and Systems, ISBN: 0-7803-3583-X, pp. 2288-2291, Jun. 9-12, 1997.
PCT, Notification of Transmittal of the International Search Report and The Written Opinion of the International Searching Authority, or the Declaration, dated Oct. 10, 2005 for International Application No. PCT/US2005/024230, 10 pages, Oct. 10, 2005.
PCT, Notification of Transmittal of the International Search Report and The Written Opinion of the International Searching Authority, or the Declaration, dated Oct. 14, 2005 for International Application No. PCT/US2005/024234, 13 pages, Oct. 14, 2005.
Baker & Botts L.L.P.
Nguyen Patricia
LandOfFree
Performing remote power amplifier linearization does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Performing remote power amplifier linearization, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Performing remote power amplifier linearization will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3574841