Telecommunications – Transmitter and receiver at separate stations – Plural transmitters or receivers
Reexamination Certificate
2002-09-27
2008-08-19
Gesessse, Tilahun B (Department: 2618)
Telecommunications
Transmitter and receiver at separate stations
Plural transmitters or receivers
C455S069000, C455S127100
Reexamination Certificate
active
07415285
ABSTRACT:
The present invention provides a method for predicting channel power fading in a wireless communications system. This prediction method estimates the channel power fading via oversampling of the received and transmitted powers. The prediction method is then combined with several proposed structures for closed loop power control. The resulting structures result in improved performance in wireless communications systems.
REFERENCES:
patent: 5204878 (1993-04-01), Larsson
patent: 5313495 (1994-05-01), Kim
patent: 5574984 (1996-11-01), Reed et al.
patent: 5727033 (1998-03-01), Weaver et al.
patent: 5924043 (1999-07-01), Takano
patent: 6011956 (2000-01-01), Yamano et al.
patent: 6034952 (2000-03-01), Dohi et al.
patent: 6035209 (2000-03-01), Tiedemann et al.
patent: 6163707 (2000-12-01), Miller
patent: 6208873 (2001-03-01), Black et al.
patent: 6243412 (2001-06-01), Fukawa
patent: 6295289 (2001-09-01), Ionescu et al.
patent: 6389296 (2002-05-01), Shiraki et al.
patent: 6463295 (2002-10-01), Yun
patent: 6512750 (2003-01-01), Palenius
patent: 6529482 (2003-03-01), Lundby
patent: 6609008 (2003-08-01), Whang et al.
patent: 6609011 (2003-08-01), Saito et al.
patent: 6621808 (2003-09-01), Sadri
patent: 6707862 (2004-03-01), Larsson
patent: 6760320 (2004-07-01), Bune
patent: 6760598 (2004-07-01), Kurjenniemi
patent: 7006842 (2006-02-01), Bi et al.
patent: 7079867 (2006-07-01), Chun et al.
patent: 7113745 (2006-09-01), Khayrallah
patent: 2002/0131386 (2002-09-01), Gwon
patent: 2003/0109225 (2003-06-01), Aldajani et al.
patent: 2003/0166407 (2003-09-01), Qian et al.
T. Ojanpera and R. Prasad, Wideband CDMA for Third Generation Mobile Communications, Artech House, London, 1998, pp. Table of contents, 47-48, 58-62, 153-156 and 208-218.
W. Xinyu, G. Ling, and J. Guoping, “Adaptive power control on the reverse link for CDMA cellular system,” Proc. of APCC/OECC'99—5thAsia Pacific Conference on Communications/4thOptoelectronics and Communications Conference, Beijing China, Oct. 1999, vol. 1, pp. 608-611.
S. Nourizadeh, P. Taaghol and R. Tafazolli, “A Novel Closed Loop Power Control for UMTS,” First International Conference on 3G Mobile Communication Technologies, London, UK, Mar. 2000, pp. 56-59.
S. Park and H. Nam, “DS/CDMA closed-loop power control with adaptive algorithm,” Electronics Letters, IEE, Aug. 19, 1999, vol. 35, No. 17, pp. 1425-1427.
M. Sim, E. Gunawan, B. Soong and C. Soh, “Performance study of close-loop power control algorithms for a cellular CDMA system,” IEEE Transactions on Vehicular Technology, IEEE, May 1999, vol. 48, No. 3, pp. 911-921.
H. Su and E. Geraniotis, “Adaptive closed-loop power control with quantized feedback and loop filtering,” 1998, IEEE, vol. 2, pp. 926-931.
S. Choe, T. Chulajat, H. Kwon, K. Byung-Jin and S. Hong, “Linear prediction at base station for closed loop power control,” IEEE 49thVehicular Technology Conference, Houston, TX, USA, May 1999, vol. 2, pp. 1469-1473.
J. Tanskanen, A. Huang and I. Hartime, “Predictive power estimators in CDMA closed loop power control,” 48thIEEE Vehicular Technology Conference, Ottawa, Ont., Canada, May 18-21, 1998, IEEE, vol. 2, pp. 1091-1095.
A. Abrardo and D. Sennati, “On the analytical evaluation of closed-loop power-control error statistics in DS-CDMA cellular systems,” IEEE Trans. Vehic. Tech., vol. 49, No. 6, pp. 2071-2080, Nov. 2000.
F. Lau and W. Tam, “Intelligent closed-loop power control algorithm in CDMA mobile radio system,” Electronics Letters, vol. 35, No. 10, pp. 785-786, May 1999.
M. Aldajani and A.H. Sayed, “An adaptive structure for sigma delta modulation with improved dynamic range,” Proc. 43rdMidwest Symposium on Circuits and Systems, Lansing, MI, vol. 1, pp. 390-394, Aug. 2000.
M. Aldajani and A.H. Sayed, “A stable adaptive structure for delta modulation with improved performance,” Proc. International Conference on Acoustics, Speech and Signal Processing Proceedings, vol. IV of VI, Salt Lake City, Utah, pp. 2621-2624, May 2001.
M. Aldajani and A.H. Sayed, “Stability and performance analysis of an adaptive sigma delta modulator,” IEEE Trans. Circuits and Systems II, vol. 48, No. 3, pp. 233-244, Mar. 2001.
C.C. Lee and R. Steele, “Closed-loop power control in CDMA systems” IEE Proceedings-Communications, vol. 143, No. 4, pp. 231-239, Aug. 1996.
V. Garg and J. Wilkes, Principles and Applications of GSM, Prentice Hall, NJ, 1999, Front cover, Copyright page, Table of Contents and pp. 93-96.
Aldajani Mansour A.
Sayed Ali H.
Gates & Cooper LLP
Gesessse Tilahun B
The Regents of the University of California
LandOfFree
Reducing power control errors in wireless communication system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reducing power control errors in wireless communication system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reducing power control errors in wireless communication system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4012514