Pulse or digital communications – Spread spectrum – Direct sequence
Reexamination Certificate
2006-02-21
2006-02-21
Tran, Khai (Department: 2637)
Pulse or digital communications
Spread spectrum
Direct sequence
C375S130000
Reexamination Certificate
active
07003021
ABSTRACT:
A system and method for communicating information signals using spread spectrum communication techniques. PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance. With orthogonal PN codes, the cross-correlation is zero over a predetermined time interval, resulting in no interference between the orthogonal codes, provided only that the code time frames are time aligned with each other. In an exemplary embodiment, signals are communicated between a cell-site and mobile units using direct sequence spread spectrum communication signals. In the cell-to-mobile link, pilot, sync, paging and voice channels are defined. Information communicated on the cell-to-mobile link channels are, in general, encoded, interleaved, bi-phase shift key (BPSK) modulated with orthogonal covering of each BPSK symbol along with quadrature phase shift key (QPSK) spreading of the covered symbols. In the mobile-to-cell link, access and voice channels are defined. Information communicated on the mobile-to-cell link channels are, in general, encoded, interleaved, orthogonal signaling along with QPSK spreading.
REFERENCES:
patent: 3310631 (1967-03-01), Brown
patent: 3660608 (1972-05-01), Moose, Jr. et al.
patent: 3715508 (1973-02-01), Blasbalg
patent: 3795864 (1974-03-01), Fullton, Jr.
patent: 3959726 (1976-05-01), Hinoshita et al.
patent: 4002991 (1977-01-01), Ogita
patent: 4017798 (1977-04-01), Gordy et al.
patent: 4020461 (1977-04-01), Adams et al.
patent: 4048563 (1977-09-01), Osborne
patent: 4052565 (1977-10-01), Baxter et al.
patent: 4092601 (1978-05-01), Lee et al.
patent: 4100376 (1978-07-01), Woythaler
patent: 4121159 (1978-10-01), Lampert
patent: 4152651 (1979-05-01), Lampert et al.
patent: 4164628 (1979-08-01), Ward et al.
patent: 4179658 (1979-12-01), Bitzer
patent: 4188580 (1980-02-01), Nicolai et al.
patent: 4189677 (1980-02-01), Cooper et al.
patent: 4193031 (1980-03-01), Cooper
patent: 4203070 (1980-05-01), Bowles et al.
patent: 4203071 (1980-05-01), Bowles et al.
patent: 4217586 (1980-08-01), McGuffin
patent: 4222115 (1980-09-01), Cooper et al.
patent: 4225976 (1980-09-01), Osborne et al.
patent: 4231113 (1980-10-01), Blasbalg
patent: 4247939 (1981-01-01), Stremswold et al.
patent: 4276646 (1981-06-01), Haggard et al.
patent: 4291409 (1981-09-01), Weinberg et al.
patent: 4291410 (1981-09-01), Caples et al.
patent: 4301530 (1981-11-01), Gutleber
patent: 4308617 (1981-12-01), German, Jr.
patent: 4309769 (1982-01-01), Taylor, Jr.
patent: 4313211 (1982-01-01), Leland
patent: 4361890 (1982-11-01), Green, Jr. et al.
patent: 4361891 (1982-11-01), Lobenstein et al.
patent: 4365327 (1982-12-01), Pirani
patent: 4394760 (1983-07-01), Kammerlander
patent: 4447907 (1984-05-01), Bjornholt et al.
patent: 4460992 (1984-07-01), Gutleber
patent: 4472815 (1984-09-01), Gutleber
patent: 4484335 (1984-11-01), Mosley et al.
patent: 4501002 (1985-02-01), Auchterlonie
patent: 4512024 (1985-04-01), Gutleber
patent: 4532635 (1985-07-01), Mangulis
patent: 4551853 (1985-11-01), Deman et al.
patent: 4559633 (1985-12-01), Kan et al.
patent: 4561089 (1985-12-01), Rouse et al.
patent: 4567588 (1986-01-01), Jerrim
patent: 4601047 (1986-07-01), Horwitz et al.
patent: 4607375 (1986-08-01), Lee
patent: 4621365 (1986-11-01), Chiu
patent: 4630283 (1986-12-01), Schiff
patent: 4635221 (1987-01-01), Kerr
patent: 4649549 (1987-03-01), Halpern et al.
patent: 4665514 (1987-05-01), Ching et al.
patent: 4670906 (1987-06-01), Thro
patent: 4672658 (1987-06-01), Kavehrad et al.
patent: 4688035 (1987-08-01), Gray et al.
patent: 4703474 (1987-10-01), Foschini et al.
patent: 4730340 (1988-03-01), Frazier, Jr.
patent: 4754450 (1988-06-01), Lynk, Jr. et al.
patent: 4765753 (1988-08-01), Schmidt
patent: 4785463 (1988-11-01), Janc et al.
patent: 4809295 (1989-02-01), Zscheile, Jr. et al.
patent: 4813040 (1989-03-01), Futato
patent: 4841545 (1989-06-01), Endo et al.
patent: 4843612 (1989-06-01), Brusch et al.
patent: 4872200 (1989-10-01), Jansen
patent: 4882579 (1989-11-01), Siwiak
patent: 4894842 (1990-01-01), Broekhoven et al.
patent: 4901307 (1990-02-01), Gilhousen et al.
patent: 4922506 (1990-05-01), McCallister et al.
patent: 4933952 (1990-06-01), Albrieux et al.
patent: 4939745 (1990-07-01), Kirimoto et al.
patent: 4941150 (1990-07-01), Iwasaki
patent: 4942591 (1990-07-01), Nease et al.
patent: 4943976 (1990-07-01), Ishigaki
patent: 4953178 (1990-08-01), Ishigaki
patent: 4958359 (1990-09-01), Kato
patent: 4962507 (1990-10-01), Renshaw
patent: 4969159 (1990-11-01), Belcher et al.
patent: 5001723 (1991-03-01), Kerr
patent: 5003533 (1991-03-01), Watanabe
patent: 5005169 (1991-04-01), Bronder et al.
patent: 5022046 (1991-06-01), Morrow, Jr.
patent: 5034961 (1991-07-01), Adams
patent: 5056109 (1991-10-01), Gilhousen et al.
patent: 5068849 (1991-11-01), Tanaka
patent: 5099495 (1992-03-01), Mikoshiba et al.
patent: 5101501 (1992-03-01), Gilhousen et al.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5109390 (1992-04-01), Gilhousen et al.
patent: 5136586 (1992-08-01), Greenblatt
patent: 5136612 (1992-08-01), Bi
patent: 5177767 (1993-01-01), Kato
patent: 5199045 (1993-03-01), Kato
patent: 5212684 (1993-05-01), MacNamee et al.
patent: 5260969 (1993-11-01), Kato et al.
patent: 5274665 (1993-12-01), Schilling
patent: 5274836 (1993-12-01), Lux
patent: 5291515 (1994-03-01), Uchida et al.
patent: 5309474 (1994-05-01), Gilhousen et al.
patent: 5341423 (1994-08-01), Nossen
patent: 5343495 (1994-08-01), Lovell et al.
patent: 5416797 (1995-05-01), Gilhousen et al.
patent: 5467367 (1995-11-01), Izumi et al.
patent: 5471497 (1995-11-01), Zehavi
patent: 5677929 (1997-10-01), Asano et al.
patent: 5715236 (1998-02-01), Gilhousen et al.
patent: 5841806 (1998-11-01), Gilhousen et al.
patent: 5943361 (1999-08-01), Gilhousen et al.
patent: 5960032 (1999-09-01), Letaief et al.
patent: 6693951 (2004-02-01), Gilhousen et al.
patent: 0 036 605 (1981-09-01), None
patent: 0 111 937 (1984-06-01), None
patent: 0 264 784 (1988-04-01), None
patent: 0 412 583 (1991-02-01), None
patent: 0 418 865 (1991-03-01), None
patent: 0 444 592 (1991-09-01), None
patent: 2 022 365 (1979-12-01), None
patent: 2 125 654 (1984-03-01), None
patent: 2 182 528 (1987-05-01), None
patent: 91/07030 (1991-05-01), None
Erwin Kreyszig, “Advanced Engineering Mathematics,” John Wily & Sons 1979; Section 4.7, pp. 186-190.
Henning F. Harmuth, “Transmission of Information by Orthogonal Functions,” Springer-Verlag New York Inc. 1969, pp. 73-81.
Nirode C. Mohanty, “Spread Spectrum and Time Division Multiple Access Satellite Communications,” IEEE Transaction on Communication, vol. Com. 25, No. 8, Aug. 1977, pp. 810-815.
Jack K. Holmes, “Coherent Spread Spectrum Systems,” John Wiley & Sons, pp. 369-371.
Rudolf F. Graf, “Modern Dictionary of Electronics,” Howard W. Sams & Co., Inc., Sixth Edition, Second Printing, 1984, pp. 749 and 1108.
William C.Y. Lee, “Mobile Cellular Telecommunications Systems,” McGraw-Hill Book Company, 1989, p. 249.
Golay, “An Approach to Multiple Access Satellite Communications Through the Use of Net Synchronized Orthogonal Signals,” Institute for Defense Analyses Research and Engineering Support Division, Report R 108, vol. 2, Apr. 1965.
Besslich, “Sequential Circuits and Walsh Functions,” NZT, Communication from the Dept. of Electrical Eng., Indian Institute of Technology, Madras, India, 1974, pp. 154-157.
Bobwetter, “Die Erzeugung von Walsh-Funktionen,” NTZ Heft 4, 1970, pp. 201-207.
Chase, et al., Spread Spectrum Multiple Access Performance of Orthogonal Codes in Fading Multipath Channels, Worcester Polytechnic Institute, Worcester, MA, IEEE Military Communications Conference, Conference Record vol. 1 of 3, 1988.
J.M. Aein et al., “Multiple Access to a Communications Satellite with a Hard-Limiting Repeater,” IDA, vol. II, Apr. 1965, pp. 107-114.
Cooper, et al., “A Spread-Spectrum Technique for High-Capacity M
Gilhousen Klein S.
Jacobs Irwin M.
Padovani Roberto
Viterbi Andrew J.
Weaver, Jr. Lindsay A.
Qualcomm Incorporated
Russell Ben Miller
Tran Khai
LandOfFree
System and method for generating signal waveforms in a CDMA... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for generating signal waveforms in a CDMA..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for generating signal waveforms in a CDMA... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3644275