CA2335742A1 - Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences - Google Patents

Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences Download PDF

Info

Publication number
CA2335742A1
CA2335742A1 CA002335742A CA2335742A CA2335742A1 CA 2335742 A1 CA2335742 A1 CA 2335742A1 CA 002335742 A CA002335742 A CA 002335742A CA 2335742 A CA2335742 A CA 2335742A CA 2335742 A1 CA2335742 A1 CA 2335742A1
Authority
CA
Canada
Prior art keywords
chip
memory
chip sequence
sequence
sequences
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.)
Abandoned
Application number
CA002335742A
Other languages
English (en)
Inventor
Hakan Eriksson
Martin Jonson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2335742A1 publication Critical patent/CA2335742A1/fr
Abandoned legal-status Critical Current

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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • 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
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • 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
    • H04B1/709—Correlator structure
    • 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
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70707—Efficiency-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Circuits Of Receivers In General (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

Un générateur (160) de séquences d'éléments mémorise des séquences dans une mémoire (190) possédant un système d'adresse de mémoire. Un lecteur de séquences d'éléments met en application un générateur (150) d'adresse de lecture de mémoire afin d'accéder à différentes phases des séquences. Ce lecteur transmet les différentes phases à des corrélateurs ou des circuits d'un récepteur à spectre étalé. Le générateur d'adresse de lecture de mémoire génère des adresses en fonction d'une valeur de sélection de récepteur de données numériques et d'une valeur de compteur. Chaque valeur de sélection de récepteur de données numériques correspond à une phase déterminée d'une séquence. La valeur de compteur correspond à une position dans le temps. En mode sommeil, cette valeur de compteur est modifiée, de façon à correspondre au nombre de cycles d'horloge d'une période de sommeil. Le récepteur conserve de la puissance pendant le sommeil et accède à la phase correcte de la séquence au moment du réveil. La mémoire peut également mémoriser des séquences de recherche. Le générateur de séquences d'éléments génère de nouvelles séquences en fonction des besoins et les enregistre dans des adresses utilisées pour mémoriser des séquences ne présentant plus d'utilité.
CA002335742A 1998-06-23 1999-06-16 Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences Abandoned CA2335742A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10277098A 1998-06-23 1998-06-23
US09/102,770 1998-06-23
PCT/SE1999/001078 WO1999067895A1 (fr) 1998-06-23 1999-06-16 Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences

Publications (1)

Publication Number Publication Date
CA2335742A1 true CA2335742A1 (fr) 1999-12-29

Family

ID=22291593

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002335742A Abandoned CA2335742A1 (fr) 1998-06-23 1999-06-16 Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences

Country Status (15)

Country Link
EP (1) EP1090465A1 (fr)
JP (1) JP2002519887A (fr)
KR (1) KR20010071566A (fr)
CN (1) CN1307756A (fr)
AR (1) AR018927A1 (fr)
AU (1) AU4941099A (fr)
BR (1) BR9911434A (fr)
CA (1) CA2335742A1 (fr)
EE (1) EE200000777A (fr)
HK (1) HK1039225A1 (fr)
ID (1) ID27301A (fr)
IL (1) IL139840A0 (fr)
NO (1) NO20006509D0 (fr)
RU (1) RU2001101930A (fr)
WO (1) WO1999067895A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7031271B1 (en) 1999-05-19 2006-04-18 Motorola, Inc. Method of and apparatus for activating a spread-spectrum radiotelephone
US7085246B1 (en) 1999-05-19 2006-08-01 Motorola, Inc. Method and apparatus for acquisition of a spread-spectrum signal
DE10241691A1 (de) * 2002-09-09 2004-03-25 Infineon Technologies Ag Einrichtung und Verfahren zur Durchführung von Korrelationen in einem Mobilfunksystem
US7522655B2 (en) 2002-09-09 2009-04-21 Infineon Technologies Ag Method and device for carrying out a plurality of correlation procedures in a mobile telephony environment
CN100365945C (zh) * 2005-07-28 2008-01-30 上海大学 码分多址的扩谱通信系统和无中心无线网络
CN101162919B (zh) * 2006-10-11 2011-01-05 中兴通讯股份有限公司 一种数据缓存电路

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5345508A (en) * 1993-08-23 1994-09-06 Apple Computer, Inc. Method and apparatus for variable-overhead cached encryption
US5490165A (en) * 1993-10-28 1996-02-06 Qualcomm Incorporated Demodulation element assignment in a system capable of receiving multiple signals
JP2689890B2 (ja) * 1993-12-30 1997-12-10 日本電気株式会社 スペクトラム拡散受信機
US5457713A (en) * 1994-03-07 1995-10-10 Sanconix, Inc. Spread spectrum alignment repositioning method
JP3372135B2 (ja) * 1995-05-24 2003-01-27 ソニー株式会社 通信端末装置
EP0767544A3 (fr) * 1995-10-04 2002-02-27 Interuniversitair Micro-Elektronica Centrum Vzw Modem programmable utilisant la communication à spectre étalé

Also Published As

Publication number Publication date
JP2002519887A (ja) 2002-07-02
RU2001101930A (ru) 2002-12-20
AR018927A1 (es) 2001-12-12
EP1090465A1 (fr) 2001-04-11
NO20006509L (no) 2000-12-20
ID27301A (id) 2001-03-22
IL139840A0 (en) 2002-02-10
CN1307756A (zh) 2001-08-08
NO20006509D0 (no) 2000-12-20
WO1999067895A1 (fr) 1999-12-29
HK1039225A1 (zh) 2002-04-12
BR9911434A (pt) 2001-03-20
AU4941099A (en) 2000-01-10
KR20010071566A (ko) 2001-07-28
EE200000777A (et) 2002-04-15

Similar Documents

Publication Publication Date Title
US7085246B1 (en) Method and apparatus for acquisition of a spread-spectrum signal
KR100315197B1 (ko) 확산스펙트럼수신기
JP3415579B2 (ja) マッチドフィルタおよび相関検出演算方法
US6141374A (en) Method and apparatus for generating multiple matched-filter PN vectors in a CDMA demodulator
US6175561B1 (en) Method and apparatus for acquiring a pilot signal in a CDMA receiver
KR100939066B1 (ko) 모든 레이크 핑거에 이용되는 공유 메모리를 구비한 사용자 장치(ｕｅ)
US6470000B1 (en) Shared correlator system and method for direct-sequence CDMA demodulation
US7382821B2 (en) Method and apparatus for configuring a RAKE receiver
JP4307740B2 (ja) 時間追跡の方法と装置
US7031271B1 (en) Method of and apparatus for activating a spread-spectrum radiotelephone
CA2335742A1 (fr) Procede et dispositif servant a memoriser differentes sequences d'elements et a acceder a ces sequences
JP2001223611A (ja) 受信装置
JP2004072418A (ja) 遅延プロファイル作成方法および遅延プロファイル作成装置
JP2002118492A (ja) 逆拡散回路
JPH11205190A (ja) マッチドフィルタおよびｃｄｍａ受信機
JP3258944B2 (ja) 移動無線受信装置
JPH1198116A (ja) Ｃｄｍａ通信システム用受信装置
MXPA00004922A (es) Metodo y aparato para activar un receptor de radiotelefono de espectro escalonado

Legal Events

Date Code Title Description
EEER Examination request
FZDE Discontinued
FZDE Discontinued

Effective date: 20060616