EP1782548A4 - DEVICE AND METHOD FOR DETERMINING USER CODE IN A QUAS-SYNCHRONOUS CDMA SYSTEM AND DEVICE AND METHOD FOR PRODUCING AND SPREADING USER CODE THEREWITH - Google Patents

DEVICE AND METHOD FOR DETERMINING USER CODE IN A QUAS-SYNCHRONOUS CDMA SYSTEM AND DEVICE AND METHOD FOR PRODUCING AND SPREADING USER CODE THEREWITH

Info

Publication number
EP1782548A4
EP1782548A4 EP04808540A EP04808540A EP1782548A4 EP 1782548 A4 EP1782548 A4 EP 1782548A4 EP 04808540 A EP04808540 A EP 04808540A EP 04808540 A EP04808540 A EP 04808540A EP 1782548 A4 EP1782548 A4 EP 1782548A4
Authority
EP
European Patent Office
Prior art keywords
user code
quasi
generating
same
cdma system
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.)
Withdrawn
Application number
EP04808540A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1782548A1 (en
Inventor
Yun-Jeong Song
Ho-Kyom Kim
Deock-Gil Oh
Ho-Jin Lee
Kwon-Hue Choi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics and Telecommunications Research Institute ETRI
Yeungnam Educational Foundation
Original Assignee
Electronics and Telecommunications Research Institute ETRI
Yeungnam Educational Foundation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Electronics and Telecommunications Research Institute ETRI, Yeungnam Educational Foundation filed Critical Electronics and Telecommunications Research Institute ETRI
Publication of EP1782548A1 publication Critical patent/EP1782548A1/en
Publication of EP1782548A4 publication Critical patent/EP1782548A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • 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
    • H04B1/7073—Synchronisation aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0002—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate
    • H04L1/0003—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission rate by switching between different modulation schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H04J13/18—Allocation of orthogonal codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
EP04808540A 2004-08-04 2004-12-22 DEVICE AND METHOD FOR DETERMINING USER CODE IN A QUAS-SYNCHRONOUS CDMA SYSTEM AND DEVICE AND METHOD FOR PRODUCING AND SPREADING USER CODE THEREWITH Withdrawn EP1782548A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020040061348A KR100662506B1 (ko) 2004-08-04 2004-08-04 준동기 코드분할다중접속 시스템에서 접속 사용자 수에따른 사용자 부호 결정 장치 및 그 방법과 그를 이용한스크램블링 기반의 사용자 부호 생성/확산 장치 및 그 방법
PCT/KR2004/003409 WO2006014044A1 (en) 2004-08-04 2004-12-22 Apparatus and method for determining user code in quasi-synchronous cdma system, and apparatus and method for generating and spreading user code using the same

Publications (2)

Publication Number Publication Date
EP1782548A1 EP1782548A1 (en) 2007-05-09
EP1782548A4 true EP1782548A4 (en) 2012-08-29

Family

ID=35787313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04808540A Withdrawn EP1782548A4 (en) 2004-08-04 2004-12-22 DEVICE AND METHOD FOR DETERMINING USER CODE IN A QUAS-SYNCHRONOUS CDMA SYSTEM AND DEVICE AND METHOD FOR PRODUCING AND SPREADING USER CODE THEREWITH

Country Status (3)

Country Link
EP (1) EP1782548A4 (ko)
KR (1) KR100662506B1 (ko)
WO (1) WO2006014044A1 (ko)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012284A1 (en) * 1997-09-02 1999-03-11 Telefonaktiebolaget Lm Ericsson (Publ) A method for assigning spreading codes
US20020089950A1 (en) * 2001-01-08 2002-07-11 Essam Sourour CDMA system using quasi-orthogonal codes

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1075089B1 (en) * 1993-10-14 2003-01-02 NTT DoCoMo, Inc. Correlation detector and communication apparatus
KR100279944B1 (ko) * 1997-12-09 2001-02-01 윤종용 씨디엠에이셀룰러시스템에서의왈쉬코드그룹할당방법
US6324159B1 (en) * 1998-05-06 2001-11-27 Sirius Communications N.V. Method and apparatus for code division multiple access communication with increased capacity through self-noise reduction
US6888813B1 (en) * 1998-05-14 2005-05-03 Masahichi Kishi Code division multiple access (CDMA) transmission system
US6091760A (en) * 1998-06-29 2000-07-18 L-3 Communications Corporation Non-recursively generated orthogonal PN codes for variable rate CDMA
KR100383614B1 (ko) * 1998-10-19 2003-10-08 삼성전자주식회사 부호분할다중접속통신시스템의할당장치및방법
US7012886B2 (en) 2001-05-16 2006-03-14 Lucent Technologies Inc. Walsh code allocation/de-allocation system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999012284A1 (en) * 1997-09-02 1999-03-11 Telefonaktiebolaget Lm Ericsson (Publ) A method for assigning spreading codes
US20020089950A1 (en) * 2001-01-08 2002-07-11 Essam Sourour CDMA system using quasi-orthogonal codes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2006014044A1 *

Also Published As

Publication number Publication date
EP1782548A1 (en) 2007-05-09
WO2006014044A1 (en) 2006-02-09
KR100662506B1 (ko) 2006-12-28
KR20060012725A (ko) 2006-02-09

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