DE69330740D1 - Entspreizungstechnik für CDMA Systeme - Google Patents
Entspreizungstechnik für CDMA SystemeInfo
- Publication number
- DE69330740D1 DE69330740D1 DE69330740T DE69330740T DE69330740D1 DE 69330740 D1 DE69330740 D1 DE 69330740D1 DE 69330740 T DE69330740 T DE 69330740T DE 69330740 T DE69330740 T DE 69330740T DE 69330740 D1 DE69330740 D1 DE 69330740D1
- Authority
- DE
- Germany
- Prior art keywords
- despreading
- technology
- cdma systems
- cdma
- systems
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/204—Multiple access
- H04B7/216—Code division or spread-spectrum multiple access [CDMA, SSMA]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7097—Interference-related aspects
- H04B1/7103—Interference-related aspects the interference being multiple access interference
- H04B1/7105—Joint detection techniques, e.g. linear detectors
- H04B1/71052—Joint detection techniques, e.g. linear detectors using decorrelation matrix
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
- H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/991,841 US5345468A (en) | 1992-12-16 | 1992-12-16 | Despreading technique for CDMA systems |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69330740D1 true DE69330740D1 (de) | 2001-10-18 |
DE69330740T2 DE69330740T2 (de) | 2002-07-04 |
Family
ID=25537635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69330740T Expired - Fee Related DE69330740T2 (de) | 1992-12-16 | 1993-12-02 | Entspreizungstechnik für CDMA Systeme |
Country Status (6)
Country | Link |
---|---|
US (1) | US5345468A (de) |
EP (1) | EP0602843B1 (de) |
JP (1) | JP3088227B2 (de) |
KR (1) | KR100278727B1 (de) |
CA (1) | CA2102082C (de) |
DE (1) | DE69330740T2 (de) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5553062A (en) * | 1993-04-22 | 1996-09-03 | Interdigital Communication Corporation | Spread spectrum CDMA interference canceler system and method |
KR100217715B1 (ko) * | 1993-12-31 | 1999-09-01 | 윤종용 | 직접확산/부호분할 다중접근 시스템에서의 업-링크 접근 시스템 |
US5617088A (en) * | 1994-01-26 | 1997-04-01 | Sony Corporation | Sampling frequency converting device and memory address control device |
CN1068163C (zh) * | 1994-04-22 | 2001-07-04 | Ntt移动通信网株式会社 | 码分多路复用信号接收方法 |
EP0721264B1 (de) * | 1994-06-23 | 2003-11-26 | Ntt Mobile Communications Network Inc. | Verfahren und anordnung zum empfangen eines code-division-multiplexsignals |
US5677930A (en) * | 1995-07-19 | 1997-10-14 | Ericsson Inc. | Method and apparatus for spread spectrum channel estimation |
US5615209A (en) * | 1995-07-26 | 1997-03-25 | Ericsson Inc. | Method and apparatus for CDMA signal orthogonalization |
US6047192A (en) * | 1996-05-13 | 2000-04-04 | Ksi Inc. | Robust, efficient, localization system |
US5790537A (en) * | 1996-05-15 | 1998-08-04 | Mcgill University | Interference suppression in DS-CDMA systems |
US6101178A (en) | 1997-07-10 | 2000-08-08 | Ksi Inc. | Pseudolite-augmented GPS for locating wireless telephones |
US6229857B1 (en) * | 1998-06-02 | 2001-05-08 | Intel Corporation | Adaptive ingress filtering system |
US6577658B1 (en) | 1999-09-20 | 2003-06-10 | E20 Corporation, Inc. | Method and apparatus for planar index guided vertical cavity surface emitting lasers |
JP3514217B2 (ja) | 2000-06-29 | 2004-03-31 | 日本電気株式会社 | ターボ復号方法及び受信機 |
DE102005053301B3 (de) * | 2005-11-09 | 2007-02-22 | Atmel Germany Gmbh | Detektionseinheit und Verfahren zur Detektion von Datensymbolen |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4885757A (en) * | 1987-06-01 | 1989-12-05 | Texas Instruments Incorporated | Digital adaptive receiver employing maximum-likelihood sequence estimation with neural networks |
US4995104A (en) * | 1989-05-08 | 1991-02-19 | At&T Bell Laboratories | Interference cancelling circuit and method |
US5031173A (en) * | 1989-08-15 | 1991-07-09 | Unisys Corporation | Decoder for added asynchronous bit sequences |
US5099493A (en) * | 1990-08-27 | 1992-03-24 | Zeger-Abrams Incorporated | Multiple signal receiver for direct sequence, code division multiple access, spread spectrum signals |
JPH0779281B2 (ja) * | 1990-09-21 | 1995-08-23 | 日本ビクター株式会社 | スペクトル拡散変調復調装置 |
DE59106942D1 (de) * | 1990-11-22 | 1996-01-04 | Ascom Tech Ag | Mehrfachzugriffsverfahren und Mobilfunksystem zur Durchführung des Mehrfachzugriffsverfahrens. |
US5218619A (en) * | 1990-12-17 | 1993-06-08 | Ericsson Ge Mobile Communications Holding, Inc. | CDMA subtractive demodulation |
US5151919A (en) * | 1990-12-17 | 1992-09-29 | Ericsson-Ge Mobile Communications Holding Inc. | Cdma subtractive demodulation |
US5136612A (en) * | 1990-12-31 | 1992-08-04 | At&T Bell Laboratories | Method and apparatus for reducing effects of multiple access interference in a radio receiver in a code division multiple access communication system |
US5177766A (en) * | 1991-06-03 | 1993-01-05 | Spectralink Corporation | Digital clock timing generation in a spread-spectrum digital communication system |
US5237586A (en) * | 1992-03-25 | 1993-08-17 | Ericsson-Ge Mobile Communications Holding, Inc. | Rake receiver with selective ray combining |
US5295153A (en) * | 1992-04-13 | 1994-03-15 | Telefonaktiebolaget L M Ericsson | CDMA frequency allocation |
-
1992
- 1992-12-16 US US07/991,841 patent/US5345468A/en not_active Expired - Lifetime
-
1993
- 1993-10-29 CA CA002102082A patent/CA2102082C/en not_active Expired - Fee Related
- 1993-12-02 DE DE69330740T patent/DE69330740T2/de not_active Expired - Fee Related
- 1993-12-02 EP EP93309641A patent/EP0602843B1/de not_active Expired - Lifetime
- 1993-12-08 KR KR1019930026827A patent/KR100278727B1/ko not_active IP Right Cessation
- 1993-12-15 JP JP05342292A patent/JP3088227B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06261021A (ja) | 1994-09-16 |
EP0602843A2 (de) | 1994-06-22 |
EP0602843A3 (de) | 1995-02-08 |
CA2102082A1 (en) | 1994-06-17 |
JP3088227B2 (ja) | 2000-09-18 |
DE69330740T2 (de) | 2002-07-04 |
CA2102082C (en) | 1998-02-03 |
KR100278727B1 (ko) | 2001-01-15 |
US5345468A (en) | 1994-09-06 |
KR940017331A (ko) | 1994-07-26 |
EP0602843B1 (de) | 2001-09-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |