Pulse or digital communications – Transmitters – Quadrature amplitude modulation
Reexamination Certificate
2006-12-05
2006-12-05
Ghebretinsae, Temesghen (Department: 2611)
Pulse or digital communications
Transmitters
Quadrature amplitude modulation
C375S295000, C375S130000, C714S752000
Reexamination Certificate
active
07145964
ABSTRACT:
The present invention provides for making code rate adjustments and modulation type adjustments in a pseudonoise (PN) encoded CDMA system. Coding rate adjustments may be made by changing the number of information bits per symbol, or Forward Error Code (FEC) coding rate. A forward error correction (FEC) block size is maintained at a constant amount. Therefore, as the number of information bits per symbol are increased, an integer multiple of bits per epoch is always maintained. The scheme permits for a greater flexibility and selection of effective data rates providing information bit rates ranging from, for example, approximately 50 kilobits per second to over 5 mega bits per second (Mbps) in one preferred embodiment.
REFERENCES:
patent: 4460992 (1984-07-01), Gutleber
patent: 4625308 (1986-11-01), Kim et al.
patent: 4862453 (1989-08-01), West et al.
patent: 4866709 (1989-09-01), West et al.
patent: 5027348 (1991-06-01), Curry, Jr.
patent: 5103459 (1992-04-01), Gilhousen et al.
patent: 5115309 (1992-05-01), Hang
patent: 5321725 (1994-06-01), Paik et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5463403 (1995-10-01), Walker et al.
patent: 5487072 (1996-01-01), Kant
patent: 5511079 (1996-04-01), Dillon
patent: 5559788 (1996-09-01), Zscheile, Jr. et al.
patent: 5606574 (1997-02-01), Hasegawa et al.
patent: 5663958 (1997-09-01), Ward
patent: 5699364 (1997-12-01), Sato et al.
patent: 5699369 (1997-12-01), Guha
patent: 5777990 (1998-07-01), Zehavi et al.
patent: 5781542 (1998-07-01), Tanaka et al.
patent: 5805567 (1998-09-01), Ramesh
patent: 5815508 (1998-09-01), Wadzinske et al.
patent: 5825807 (1998-10-01), Kumar
patent: 6151332 (2000-11-01), Gorsuch et al.
patent: 6236647 (2001-05-01), Amalfitano
patent: 6285681 (2001-09-01), Kolze et al.
patent: 6310856 (2001-10-01), Taipale
patent: 0 443 061 (1990-02-01), None
patent: 0 635 949 (1994-07-01), None
patent: 0 827 312 (1998-04-01), None
patent: 0 998 069 (1999-10-01), None
patent: 2 266 389 (1975-10-01), None
patent: 2 761 557 (1997-03-01), None
patent: WO 96/13914 (1996-05-01), None
patent: WO 98/43373 (1998-10-01), None
patent: WO 98/59447 (1998-12-01), None
patent: WO 99/14878 (1999-03-01), None
patent: WO 99/39472 (1999-08-01), None
patent: WO 99/44341 (1999-09-01), None
patent: WO 00/52831 (2000-09-01), None
patent: WO 00/65764 (2000-11-01), None
patent: WO 00/72496 (2000-11-01), None
Wang, B., and Chang, P., “Spread Spectrum Multiple-Access with DPSK Modulation and Diversity for Image Transmission over Indoor Radio Multipath Fading Channels”,IEEE, pp. 200-214 (1996).
Hanzo, L., et al., “Burst-By-Burst Adaptive Wideband Wireless Video Telephony,”Communications and Vehicular Technology: 215-232 (2000).
Hagenauer, J., “Rate-Compatible Punctured Convolutional Codes (RCPC Codes) and their Applications,”IEEE Transactions on Communications, 36(4):389-400 (Apr. 1988).
Lin, S. et al., “Automatic-Repeat-Request Error-Control Schemes,”IEEE Communications Magazine, 22(12):5-17 (Dec. 1984).
Shacham, N., “A Selective-Repeat-ARQ Protocol for Parallel Channels and Its Resequencing Analysis,”IEEE Transactions on Communications, 40(4):773-782 (Apr. 1992).
Rupar, M. et al., “Satellite VSAT Networking Using CDMA,”AIAA-98-5128, Oct. 29, 1998, pp. 1-6.
Hoffmann John E.
Nelson, Jr. George Rodney
Proctor, Jr. James A.
Riley Daniel I.
Rouphael Antoine J.
Ghebretinsae Temesghen
Hamilton Brook Smith & Reynolds P.C.
IPR Licensing Inc.
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