Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2005-12-13
2005-12-13
Deppe, Betsy L. (Department: 2637)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000, C375S219000, C370S342000, C370S479000
Reexamination Certificate
active
06975668
ABSTRACT:
A new method makes the most efficient use of the scarce spectral bandwidth in a wireless discrete multitone spread spectrum communications system by updating the spectral and/or spatial spreading weights at a rate that is determined by the measured quality of the link. Low quality links require more frequent updates of the spreading weights than do higher quality links. Spreading weights and despreading weights for a station are adaptively updated, depending on the error in received signals. If the error value is less than a threshold error value, then the method maintains the existing spreading weights as the current spreading weights to apply to an outgoing data signal. Alternately, if the error value is greater than the threshold error value, then the method adaptively calculates updated despreading weights at the base station from the first spread signal and calculates updated spreading weights as the current spreading weights from the updated despreading weights to apply to the outgoing data signal.
REFERENCES:
patent: 3522540 (1970-08-01), Lee
patent: 3633107 (1972-01-01), Brady
patent: 3745464 (1973-07-01), Lee
patent: 3971988 (1976-07-01), Denenberg
patent: 4249181 (1981-02-01), Lee
patent: 4381562 (1983-04-01), Acampora
patent: 4383332 (1983-05-01), Glance et al.
patent: 4412350 (1983-10-01), Miedema
patent: 4488445 (1984-12-01), Aske
patent: 4495648 (1985-01-01), Giger
patent: 4510595 (1985-04-01), Glance et al.
patent: 4644562 (1987-02-01), Kavehrad
patent: 4723321 (1988-02-01), Saleh
patent: 4726040 (1988-02-01), Acampora
patent: 4789983 (1988-12-01), Acampora et al.
patent: 4807253 (1989-02-01), Hagenauer et al.
patent: 4827499 (1989-05-01), Warty et al.
patent: 4835517 (1989-05-01), van der Gracht et al.
patent: 4914676 (1990-04-01), Iwamatsu et al.
patent: 5029185 (1991-07-01), Wei
patent: 5048057 (1991-09-01), Saleh et al.
patent: 5054035 (1991-10-01), Tarallo et al.
patent: 5056112 (1991-10-01), Wei
patent: 5084869 (1992-01-01), Russell
patent: 5088113 (1992-02-01), Wei
patent: 5136612 (1992-08-01), Bi
patent: 5177765 (1993-01-01), Holland et al.
patent: 5226071 (1993-07-01), Bolliger et al.
patent: 5260967 (1993-11-01), Schilling
patent: 5260968 (1993-11-01), Gardner et al.
patent: 5274384 (1993-12-01), Hussain et al.
patent: 5278892 (1994-01-01), Bolliger et al.
patent: 5289464 (1994-02-01), Wang
patent: 5291475 (1994-03-01), Bruckert
patent: 5295138 (1994-03-01), Greenberg et al.
patent: 5295152 (1994-03-01), Gudmundson et al.
patent: 5302914 (1994-04-01), Arntz et al.
patent: 5305308 (1994-04-01), English et al.
patent: 5305353 (1994-04-01), Weerackody
patent: 5319634 (1994-06-01), Bartholomew et al.
patent: 5361397 (1994-11-01), Wright
patent: 5363375 (1994-11-01), Chuang et al.
patent: 5367539 (1994-11-01), Copley
patent: 5394435 (1995-02-01), Weerackody
patent: 5400322 (1995-03-01), Hunt et al.
patent: 5410538 (1995-04-01), Roche et al.
patent: 5410740 (1995-04-01), Hagstrom
patent: 5414699 (1995-05-01), Lee
patent: 5438329 (1995-08-01), Gastouniotis et al.
patent: 5463656 (1995-10-01), Polivka et al.
patent: 5481570 (1996-01-01), Winters
patent: 5490174 (1996-02-01), Shin et al.
patent: 5504775 (1996-04-01), Chouly et al.
patent: 5509015 (1996-04-01), Tiedemann, Jr. et al.
patent: 5515378 (1996-05-01), Roy, III et al.
patent: 5541954 (1996-07-01), Emi
patent: 5570349 (1996-10-01), Bustamante et al.
patent: 5598428 (1997-01-01), Sato
patent: 5613211 (1997-03-01), Matsuno
patent: 5613219 (1997-03-01), Vogel et al.
patent: 5654955 (1997-08-01), Natali
patent: 5657313 (1997-08-01), Takahashi et al.
patent: 5657355 (1997-08-01), Reusens
patent: 5661780 (1997-08-01), Yamamoto et al.
patent: 5689502 (1997-11-01), Scott
patent: 5694388 (1997-12-01), Sawahashi et al.
patent: 5732068 (1998-03-01), Takahashi et al.
patent: 5732113 (1998-03-01), Schmidl et al.
patent: 5734647 (1998-03-01), Yoshida et al.
patent: 5745860 (1998-04-01), Kallin
patent: 5752168 (1998-05-01), Monot et al.
patent: 5752202 (1998-05-01), Obright
patent: 5799000 (1998-08-01), Hoole
patent: 5802044 (1998-09-01), Baum et al.
patent: 5864543 (1999-01-01), Hoole
patent: 5875208 (1999-02-01), Hoole
patent: 5896425 (1999-04-01), Hirano et al.
patent: 5907577 (1999-05-01), Hoole
patent: 5914981 (1999-06-01), Veintimilla
patent: 5923700 (1999-07-01), Zhang
patent: 5924034 (1999-07-01), Dupuy
patent: 5933421 (1999-08-01), Alamouti et al.
patent: 5933478 (1999-08-01), Ozaki et al.
patent: 5943375 (1999-08-01), Veintimilla
patent: 5987338 (1999-11-01), Gibbons et al.
patent: 5999569 (1999-12-01), Oshima
patent: 6047200 (2000-04-01), Gibbons et al.
patent: 6064338 (2000-05-01), Kobayakawa et al.
patent: 6073032 (2000-06-01), Keskitalo et al.
patent: 6081566 (2000-06-01), Molnar et al.
patent: 6084932 (2000-07-01), Veintimilla
patent: 6085114 (2000-07-01), Gibbons et al.
patent: 6128276 (2000-10-01), Agee
patent: 6131016 (2000-10-01), Greenstein et al.
patent: 6160839 (2000-12-01), Zhang
patent: 6175555 (2001-01-01), Hoole
patent: 6198719 (2001-03-01), Faruque et al.
patent: 6215777 (2001-04-01), Chen et al.
patent: 6216019 (2001-04-01), Gibbons et al.
patent: 6347236 (2002-02-01), Gibbons et al.
patent: 6359923 (2002-03-01), Agee et al.
patent: 6408016 (2002-06-01), Zhang
patent: 6442222 (2002-08-01), Ghazi-Moghadam et al.
patent: 6480522 (2002-11-01), Hoole et al.
patent: 6487235 (2002-11-01), Hoole
patent: 6501771 (2002-12-01), Hoole
patent: 6510182 (2003-01-01), Lee et al.
patent: 6519278 (2003-02-01), Hiramatsu
patent: 6560209 (2003-05-01), Alamouti et al.
patent: 6584144 (2003-06-01), Alamouti et al.
patent: 6600776 (2003-07-01), Alamouti et al.
patent: 2002/0122465 (2002-09-01), Agee et al.
patent: 2003/0053488 (2003-03-01), Hoole
patent: 2003/0156570 (2003-08-01), Alamouti et al.
patent: 2278852 (1998-08-01), None
patent: 0 490 509 (1992-06-01), None
patent: 0 582 537 (1994-02-01), None
patent: 0 637 181 (1995-02-01), None
patent: 0 639 035 (1995-02-01), None
patent: 0 641 096 (1995-03-01), None
patent: 0 653 859 (1995-05-01), None
patent: 0 653 973 (1995-05-01), None
patent: 0 668 664 (1995-08-01), None
patent: 0 685 973 (1995-12-01), None
patent: 0 690 593 (1996-01-01), None
patent: 0 696 856 (1996-02-01), None
patent: WO 94/05094 (1994-03-01), None
patent: WO 94/13077 (1994-06-01), None
patent: WO 94/19877 (1994-09-01), None
patent: WO 95/09512 (1995-04-01), None
patent: WO 95/10144 (1995-04-01), None
patent: WO 95/32595 (1995-11-01), None
patent: WO 96/09731 (1996-03-01), None
patent: WO 96/22662 (1996-07-01), None
patent: WO 96/31009 (1996-10-01), None
patent: WO 96/36136 (1996-11-01), None
patent: WO 96/39001 (1996-12-01), None
patent: WO 97/01256 (1997-01-01), None
patent: WO 97/02665 (1997-01-01), None
patent: WO 97/05709 (1997-02-01), None
patent: WO 98/35463 (1998-08-01), None
patent: WO 98/37638 (1998-08-01), None
U.S. Appl. No. 10/435,304, Alamouti et al., filed May 8, 2003.
Chan et al., “Efficient Frequency Assignments Scheme for Intermodulation Distortion Reduction in Fiber-Optic Microcellular Systems,” Electronic Letters, Oct. 27, 1994, pp. 1831-1832, vol. 30, No. 22, IEEE, Stevenage, UK.
Chang, “Synthesis of Band Limited Orthogonal Signals for Multichannel Data Transmission,” Bell System Technical Journal, Dec. 1966, pp. 1775-1796, American Telephone and Telegraph Co., New York.
Cimini, Leonard J., Jr., “Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing” IEEE Transactions on Communications, Jul. 1985, pp. 665-675, vol. Comm. 33, No. 7, IEEE, New York.
Davies et al., Telecom Australia, Rev. Activities, 1985/1986, pp. 41-43.
Davies et al., “Proposed Advanced Base Station Antennas for Future Cellular Mobile Radio Systems,” A.T.R., 1998, pp. 53-60, vol. 22, No. 1, Telecom Research Australia Lab, Australia.
Fazel, “Narrow-Band Interface Rejection in Orthogonal Multi-Carrier Spread Spectrum Communications,” Record, 1994, Third Annual International Conference on Universal Personal Communications, IEEE, 1994, pp. 46-50.
Fazel, K., “Performance of CDMA/OFDM for
Cingular Wireless II LLC
Deppe Betsy L.
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