BR0014822A - Receptor cdma e métodos de recepção de busca, dispositivo de busca e sistema cdma - Google Patents

Receptor cdma e métodos de recepção de busca, dispositivo de busca e sistema cdma

Info

Publication number
BR0014822A
BR0014822A BR0014822A BR0014822A BR0014822A BR 0014822 A BR0014822 A BR 0014822A BR 0014822 A BR0014822 A BR 0014822A BR 0014822 A BR0014822 A BR 0014822A BR 0014822 A BR0014822 A BR 0014822A
Authority
BR
Brazil
Prior art keywords
search
reception
delay circuit
cdma
output
Prior art date
Application number
BR0014822A
Other languages
English (en)
Inventor
Tetsuya Miura
Original Assignee
Nec Corp
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 Nec Corp filed Critical Nec Corp
Publication of BR0014822A publication Critical patent/BR0014822A/pt

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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/708—Parallel implementation
    • 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
    • H04B1/70754—Setting of search window, i.e. range of code offsets to be searched
    • 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
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • 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
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70753—Partial phase search
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)

Abstract

"RECEPTOR CDMA E MéTODOS DE RECEPçãO DE BUSCA, DISPOSITIVO DE BUSCA E SISTEMA CDMA". Provê-se um receptor CDMA e um método de recepção onde mesmo no caso onde um sincronismo de recepção de um quadro de rádio seja adiantado em relação ao sincronismo de referência de recepção de uma estação base no momento de DHO, um acompanhamento flexível da estação móvel pode ser executado e seja permitida recepção contínua sem complicar estrutura instrumental. No receptor CDMA compreendendo uma porção de circuito de rádio (40) para obter um sinal de banda-base (11) a partir de um sinal de alta freq³ência recebido por antena (41) e porção de circuito de demodulação (10A) para combinar sinais a partir de uma pluralidade de trajetórias contida no sinal de banda-base para obter um sinal demodulado, um dispositivo de busca (13A) da porção de circuito de demodulação sendo construído incluindo um circuito de atraso de deslocamento de janela de busca (24) suprido com a saída de um gerador de códigos de difusão (25) para suprir a saída a um circuito de atraso de busca (23), e uma porção de controle de deslocamento de janela de busca (26) para controlar o circuito de atraso de janela de busca (24) e, adicionalmente, um seletor (32) conectado a uma saída do controle a partir da porção de controle de deslocamento de janela de busca e uma linha de sinal de início de hand-over de diversidade (17) a partir da porção de controle de receptor (19) e tendo uma saída conectada ao circuito de atraso de deslocamento de janela de busca. Daí, se obtendo um sincronismo para iniciar busca que é capaz de ser alterado.
BR0014822A 1999-10-06 2000-10-06 Receptor cdma e métodos de recepção de busca, dispositivo de busca e sistema cdma BR0014822A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP28598999A JP2001111456A (ja) 1999-10-06 1999-10-06 Ｃｄｍａ受信機及び受信方法
PCT/JP2000/006994 WO2001026243A1 (fr) 1999-10-06 2000-10-06 Recepteur amcr et methode afferente

Publications (1)

Publication Number Publication Date
BR0014822A true BR0014822A (pt) 2002-08-27

Family

ID=17698582

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0014822A BR0014822A (pt) 1999-10-06 2000-10-06 Receptor cdma e métodos de recepção de busca, dispositivo de busca e sistema cdma

Country Status (7)

Country Link
EP (1) EP1225707A4 (pt)
JP (1) JP2001111456A (pt)
KR (1) KR20020035175A (pt)
CN (1) CN1402911A (pt)
AU (1) AU7558500A (pt)
BR (1) BR0014822A (pt)
WO (1) WO2001026243A1 (pt)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6714527B2 (en) 1999-09-21 2004-03-30 Interdigital Techology Corporation Multiuser detector for variable spreading factors
WO2001022610A1 (en) 1999-09-21 2001-03-29 Interdigital Technology Corporation Multiuser detector for variable spreading factors
US6741653B2 (en) 2002-07-01 2004-05-25 Interdigital Technology Corporation Data detection for codes with non-uniform spreading factors
US20040072553A1 (en) * 2002-09-20 2004-04-15 Xiaohui Wang Methods, systems, and computer program products for selecting delay positions for a RAKE receiver by adjusting the delay positions based on comparisons of signal to interference ratios and/or powers for multi-path signals over time
DE60303496D1 (de) * 2003-05-27 2006-04-20 Ericsson Telefon Ab L M Positionierung eines Recherchegleitfensters zum Mehrwegsignalenempfäng
WO2004107599A1 (en) * 2003-05-27 2004-12-09 Telefonaktiebolaget L M Ericsson (Publ) Positioning a multipath search window
CN1303839C (zh) * 2003-12-19 2007-03-07 北京天碁科技有限公司 一种降低小区初搜运算量并提高运算精度的方法及装置
CN101185357B (zh) 2005-03-29 2011-06-01 富士通株式会社 切换系统
CN1822527B (zh) * 2006-03-17 2011-04-20 上海宣普实业有限公司 估计窗的有效性的检测方法
JP4904929B2 (ja) 2006-05-31 2012-03-28 富士通セミコンダクター株式会社 Ｏｆｄｍ受信機、妨害波判別方法、窓制御装置、及び窓制御方法
CN100550668C (zh) * 2006-08-08 2009-10-14 华为技术有限公司 一种实现多小区接入前导检测资源复用的方法和装置
KR101040143B1 (ko) * 2009-05-06 2011-06-09 김태형 수위조절용 자동제어 원추형 플롯스위치
KR101040142B1 (ko) * 2009-05-06 2011-06-09 김태형 수위조절용 자동제어 플롯스위치
CN103973333A (zh) * 2013-01-24 2014-08-06 意法-爱立信有限公司 一种粗小区搜索方法、装置及终端

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU677079B2 (en) * 1993-06-14 1997-04-10 Telefonaktiebolaget Lm Ericsson (Publ) Time alignment of transmission in a down-link of a CDMA system
JP2606590B2 (ja) * 1994-06-30 1997-05-07 日本電気株式会社 局間同期方法
DE69533540T2 (de) * 1994-07-29 2005-11-17 Qualcomm, Inc., San Diego Verfahren und gerät zum ausführen der kodeerfassung in einem cdma übertragungssystem
US5790589A (en) * 1996-08-14 1998-08-04 Qualcomm Incorporated System and method for rapidly reacquiring a pilot channel
US5881058A (en) * 1996-11-25 1999-03-09 Motorola, Inc. Method for performing a signal search in a wireless communication system
EP0845877A3 (en) * 1996-11-28 2002-03-27 Oki Electric Industry Co., Ltd. Mobile communication system for accomplishing handover with phase difference of frame sync signals corrected
US5872774A (en) * 1997-09-19 1999-02-16 Qualcomm Incorporated Mobile station assisted timing synchronization in a CDMA communication system
EP0945992A1 (en) * 1998-03-27 1999-09-29 TTP Communications Limited CDMA array processor
JP2947279B1 (ja) * 1998-07-31 1999-09-13 日本電気株式会社 スペクトラム拡散通信システム、及びスペクトラム拡散通信システムにおけるハンドオーバー方法
JP3479935B2 (ja) * 1998-08-19 2003-12-15 富士通株式会社 Ｃｄｍａ移動通信におけるハンドオーバ方法並びにｃｄｍａ移動通信システム、その基地局及び移動局
JP3835724B2 (ja) * 1999-02-23 2006-10-18 株式会社日立国際電気 同期方法及び同期回路
JP3322240B2 (ja) * 1999-05-10 2002-09-09 日本電気株式会社 Ｃｄｍａ受信機

Also Published As

Publication number Publication date
EP1225707A4 (en) 2003-07-09
AU7558500A (en) 2001-05-10
KR20020035175A (ko) 2002-05-09
JP2001111456A (ja) 2001-04-20
CN1402911A (zh) 2003-03-12
WO2001026243A1 (fr) 2001-04-12
EP1225707A1 (en) 2002-07-24

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Legal Events

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B08F Application fees: application dismissed [chapter 8.6 patent gazette]

Free format text: REFERENTE A 5A, 6A E 7A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1929 DE 26/12/2007.

B15K Others concerning applications: alteration of classification

Ipc: H04B 1/708 (2011.01), H04B 1/7075 (2011.01), H04B