ES2166212T3 - Procedimiento de acceso multiple de tipo cdma con capacidad mejorada. - Google Patents
Procedimiento de acceso multiple de tipo cdma con capacidad mejorada.Info
- Publication number
- ES2166212T3 ES2166212T3 ES99440085T ES99440085T ES2166212T3 ES 2166212 T3 ES2166212 T3 ES 2166212T3 ES 99440085 T ES99440085 T ES 99440085T ES 99440085 T ES99440085 T ES 99440085T ES 2166212 T3 ES2166212 T3 ES 2166212T3
- Authority
- ES
- Spain
- Prior art keywords
- bits
- random
- symbols
- sequences
- multiple access
- 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 - Lifetime
Links
Classifications
-
- 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
- H04B1/7107—Subtractive interference cancellation
- H04B1/71075—Parallel interference cancellation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/0022—PN, e.g. Kronecker
Abstract
Procedimiento de acceso múltiple de tipo CDMA, para transmitir varios mensajes que contienen, cada uno, una serie de símbolos, en el cual: { se codifica cada símbolo a transmitir por una secuencia de N bits para obtener para cada símbolo una secuencia de N contribuciones denominadas fragmentos, { se combinan los fragmentos de los diferentes mensajes para obtener una señal transmitida, { se recibe la señal transmitida, caracterizado porque { siNsímbolos, a lo sumo, son transmitidos simultáneamente, se eligen, para las secuencias de bits utilizadas, secuencias ortogonales, y { siMsímbolos son transmitidos simultáneamente, siendo M mayor que N, se eligen, para N símbolos, N secuencias ortogonales de N bits, y para M-N símbolos suplementarios restantes, secuencias de N bits aleatorios o seudo-aleatorios, { siendo una secuencia de N bits aleatoria o seudo-aleatoria si, para símbolos que siguen a transmitir de un mismo mensaje, las secuencias de N bits no se reproducen más que con un periodo mayor que N.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99440085A EP1050987B1 (fr) | 1999-04-21 | 1999-04-21 | Procédé d'accès multiple de type CDMA à capacité améliorée |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2166212T3 true ES2166212T3 (es) | 2002-04-01 |
Family
ID=8242323
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES99440085T Expired - Lifetime ES2166212T3 (es) | 1999-04-21 | 1999-04-21 | Procedimiento de acceso multiple de tipo cdma con capacidad mejorada. |
Country Status (4)
Country | Link |
---|---|
US (1) | US6434131B1 (es) |
EP (1) | EP1050987B1 (es) |
DE (1) | DE69900409T2 (es) |
ES (1) | ES2166212T3 (es) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3695571B2 (ja) * | 1999-07-21 | 2005-09-14 | 株式会社エヌ・ティ・ティ・ドコモ | Cdma移動通信システムにおけるcdma受信装置および受信信号電力測定方法 |
US6947748B2 (en) | 2000-12-15 | 2005-09-20 | Adaptix, Inc. | OFDMA with adaptive subcarrier-cluster configuration and selective loading |
US8000377B2 (en) * | 2004-05-24 | 2011-08-16 | General Dynamics C4 Systems, Inc. | System and method for variable rate multiple access short message communications |
US9298513B2 (en) * | 2004-10-07 | 2016-03-29 | International Business Machines Corporation | Method and structure for autonomic application differentiation/specialization |
US7573851B2 (en) | 2004-12-07 | 2009-08-11 | Adaptix, Inc. | Method and system for switching antenna and channel assignments in broadband wireless networks |
US9831908B2 (en) * | 2012-05-31 | 2017-11-28 | Mediatek Inc. | Telecommunications methods facilitating sharing of spreading codes |
WO2017106397A1 (en) * | 2015-12-15 | 2017-06-22 | William Marsh Rice University | Distributed and scalable physical layer and medium access design for uplink multiuser multiple-input, multiple-output (mu-mimo) in wireless local area network (wlan) systems |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR960003102B1 (ko) * | 1993-12-01 | 1996-03-04 | 재단법인 한국전자통신연구소 | 씨.디.엠.에이(cdma) 이동통신 기지국 변조장치의 채널 변조회로 및 그를 이용한 변조장치 |
JPH07336767A (ja) * | 1994-06-10 | 1995-12-22 | Oki Electric Ind Co Ltd | 送信装置 |
ZA961025B (en) * | 1995-02-28 | 1996-07-16 | Qualcomm Inc | Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels |
US6292476B1 (en) * | 1997-04-16 | 2001-09-18 | Qualcomm Inc. | Method and apparatus for providing variable rate data in a communications system using non-orthogonal overflow channels |
US5881056A (en) * | 1996-08-20 | 1999-03-09 | Lucent Technologies Inc. | Method and apparatus of a multi-code code division multiple access receiver having shared accumulator circuits |
US6192068B1 (en) * | 1996-10-03 | 2001-02-20 | Wi-Lan Inc. | Multicode spread spectrum communications system |
-
1999
- 1999-04-21 EP EP99440085A patent/EP1050987B1/fr not_active Expired - Lifetime
- 1999-04-21 ES ES99440085T patent/ES2166212T3/es not_active Expired - Lifetime
- 1999-04-21 DE DE69900409T patent/DE69900409T2/de not_active Expired - Lifetime
- 1999-06-24 US US09/339,232 patent/US6434131B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69900409D1 (de) | 2001-12-06 |
DE69900409T2 (de) | 2002-06-27 |
US6434131B1 (en) | 2002-08-13 |
EP1050987B1 (fr) | 2001-10-31 |
EP1050987A1 (fr) | 2000-11-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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