BR0016617A - Método e equipamento para efetuar captação de busca em um sistema de comunicação de múltiplas portadoras - Google Patents

Método e equipamento para efetuar captação de busca em um sistema de comunicação de múltiplas portadoras

Info

Publication number
BR0016617A
BR0016617A BR0016617-0A BR0016617A BR0016617A BR 0016617 A BR0016617 A BR 0016617A BR 0016617 A BR0016617 A BR 0016617A BR 0016617 A BR0016617 A BR 0016617A
Authority
BR
Brazil
Prior art keywords
factor
pilot
time
equipment
communication system
Prior art date
Application number
BR0016617-0A
Other languages
English (en)
Inventor
Yu-Cheun Jou
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of BR0016617A publication Critical patent/BR0016617A/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
    • H04B1/7083—Cell search, e.g. using a three-step approach
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/023—Multiplexing of multicarrier modulation signals
    • H04L5/026—Multiplexing of multicarrier modulation signals using code division
    • 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
    • H04B1/7077—Multi-step acquisition, e.g. multi-dwell, coarse-fine or validation
    • H04B1/70775—Multi-dwell schemes, i.e. multiple accumulation times
    • 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
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

"MéTODO E EQUIPAMENTO PARA EFETUAR CAPTAçãO DE BUSCA EM UM SISTEMA DE COMUNICAçãO DE MúLTIPLAS PORTADORAS". Um método e um equipamento para buscar por um canal de tráfego em uma rede de comunicação de espectro espalhado de múltiplas portadoras. Na primeira modalidade, todos os três sinais piloto são transmitidos com igual potência a partir da estação base. A estação remota pode combinar de forma não coerente a energia recebida de todos os três pilotos em uma hipótese de tempo. Isto irá reduzir o valor de M (o tempo de acumulação não coerente) por um fator de três. Dessa forma, o tempo médio de captação é encurtado por um fator de três com a mesma probabilidade de detecção e alarme falso que um sistema de portadora única (1X), caso cada piloto seja equivalente, em potência, a um piloto 1X. Note-se que o número de operações (isto é, a complexidade) é a mesma que aquela para um sistema 1X, porém o tempo decorrido é encurtado por um fator de 3.
BR0016617-0A 1999-12-22 2000-12-21 Método e equipamento para efetuar captação de busca em um sistema de comunicação de múltiplas portadoras BR0016617A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/470,224 US6466606B1 (en) 1999-12-22 1999-12-22 Method and apparatus for performing search acquisition in a multi-carrier communication system
PCT/US2000/034979 WO2001047136A1 (en) 1999-12-22 2000-12-21 Method and apparatus for performing search acquisition in a multi-carrier communication system

Publications (1)

Publication Number Publication Date
BR0016617A true BR0016617A (pt) 2002-12-24

Family

ID=23866746

Family Applications (1)

Application Number Title Priority Date Filing Date
BR0016617-0A BR0016617A (pt) 1999-12-22 2000-12-21 Método e equipamento para efetuar captação de busca em um sistema de comunicação de múltiplas portadoras

Country Status (12)

Country Link
US (1) US6466606B1 (pt)
EP (1) EP1240724B1 (pt)
JP (1) JP4813724B2 (pt)
KR (1) KR100743406B1 (pt)
CN (1) CN100388638C (pt)
AT (1) ATE426273T1 (pt)
AU (1) AU2592001A (pt)
BR (1) BR0016617A (pt)
DE (1) DE60041831D1 (pt)
HK (1) HK1052592B (pt)
TW (1) TW498631B (pt)
WO (1) WO2001047136A1 (pt)

Families Citing this family (24)

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Publication number Priority date Publication date Assignee Title
US6542743B1 (en) * 1999-08-31 2003-04-01 Qualcomm, Incorporated Method and apparatus for reducing pilot search times utilizing mobile station location information
CN100385833C (zh) * 1999-12-28 2008-04-30 株式会社Ntt都科摩 路径搜索方法与信道估计方法以及通信装置
US7224719B1 (en) * 2000-03-31 2007-05-29 Qualcomm, Incorporated Fast acquisition of a pilot signal in a wireless communication device
US6954644B2 (en) * 2000-12-04 2005-10-11 Telefonaktiebolaget Lm Ericsson (Publ) Using geographical coordinates to determine mobile station time position for synchronization during diversity handover
CN1141815C (zh) * 2000-12-18 2004-03-10 信息产业部电信传输研究所 一种码分多址多径衰落信道的频率自动校正装置
KR100488078B1 (ko) * 2000-12-21 2005-05-09 엘지전자 주식회사 이동 통신 시스템 수신단의 파일럿 신호 검색기 및 방법
US7054375B2 (en) * 2000-12-22 2006-05-30 Nokia Corporation Method and apparatus for error reduction in an orthogonal modulation system
JP3851525B2 (ja) * 2001-08-09 2006-11-29 株式会社エヌ・ティ・ティ・ドコモ 移動局装置、移動通信システムおよびキャリア検出方法
KR100426621B1 (ko) * 2001-12-20 2004-04-13 한국전자통신연구원 단말기의 프리엠블 신호를 탐색하는 작은 창 프리엠블탐색 장치 및 그 방법
US7392045B2 (en) * 2002-01-15 2008-06-24 Marvell International Ltd. Method and apparatus for searching for a base station using an adaptable search window
US7426392B2 (en) * 2002-05-23 2008-09-16 Intel Corporation Search receiver using adaptive detection theresholds
US20040062300A1 (en) * 2002-10-01 2004-04-01 Mcdonough John G. System and method for detecting direct sequence spread spectrum signals using batch processing of independent parameters
US7634559B2 (en) * 2003-09-11 2009-12-15 Standard Chartered (Ct) Plc System and method for analyzing network software application changes
US7092353B2 (en) * 2003-10-17 2006-08-15 Qualcomm Incorporated Carrier search methods and apparatus
US20060194577A1 (en) * 2005-02-25 2006-08-31 Yu-Li Su Carrier search methods and related devices
US8385833B2 (en) * 2009-04-30 2013-02-26 Telefonaktiebolaget L M Ericsson (Publ) Adaptive idle mode measurement methods and apparatus
US8599749B2 (en) * 2009-08-20 2013-12-03 Qualcomm Incorporated Apparatus and method of searching multi-carrier active set pilots
US8238929B2 (en) * 2009-12-03 2012-08-07 Marvell World Trade Ltd. RSSI estimation in multi-technology communication terminals
US9853847B2 (en) * 2009-12-30 2017-12-26 Mediatek Inc. Measurement and carrier group based optimization in wireless OFDM multi-carrier communication systems
TWI419040B (zh) * 2010-09-24 2013-12-11 Kye Systems Corp Index control device, system and method thereof
US9668191B2 (en) * 2012-06-11 2017-05-30 Qualcomm Incorporated Methods and apparatuses for saving user equipment power by search length reduction
CN105704077B (zh) * 2014-11-25 2019-05-24 联咏科技股份有限公司 信号接收系统、多载波信号频带检测方法及其解调制装置
CN106040679B (zh) * 2016-07-12 2019-01-22 中国神华能源股份有限公司 一种用于港口机械的水槽清淤设备和方法
CN113452403B (zh) * 2021-08-31 2022-01-21 北京理工大学 多载波相干捕获方法、装置、电子设备及存储介质

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4901307A (en) 1986-10-17 1990-02-13 Qualcomm, Inc. Spread spectrum multiple access communication system using satellite or terrestrial repeaters
US5109390A (en) 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5101501A (en) 1989-11-07 1992-03-31 Qualcomm Incorporated Method and system for providing a soft handoff in communications in a cdma cellular telephone system
US5056109A (en) 1989-11-07 1991-10-08 Qualcomm, Inc. Method and apparatus for controlling transmission power in a cdma cellular mobile telephone system
US5103459B1 (en) 1990-06-25 1999-07-06 Qualcomm Inc System and method for generating signal waveforms in a cdma cellular telephone system
BR9506273A (pt) * 1994-07-29 1997-08-12 Qualcomm Inc Método para determinar a sincronização da sequência pn em um sistema de comunicação de espectro de propagação por sequência direta e aparelho e sistema para selecionar uma sequência de demodulação sincronizada
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US5805648A (en) * 1995-07-31 1998-09-08 Qualcomm Incorporated Method and apparatus for performing search acquisition in a CDMA communication system
JPH1113907A (ja) * 1997-06-30 1999-01-22 Aiwa Co Ltd 逆止弁機構、空気清浄装置、マイナスイオン発生装置及び加湿器

Also Published As

Publication number Publication date
TW498631B (en) 2002-08-11
HK1052592B (zh) 2009-01-30
KR100743406B1 (ko) 2007-07-30
KR20020062372A (ko) 2002-07-25
CN1413391A (zh) 2003-04-23
CN100388638C (zh) 2008-05-14
HK1052592A1 (en) 2003-09-19
ATE426273T1 (de) 2009-04-15
DE60041831D1 (de) 2009-04-30
EP1240724B1 (en) 2009-03-18
US6466606B1 (en) 2002-10-15
JP2003518808A (ja) 2003-06-10
AU2592001A (en) 2001-07-03
EP1240724A1 (en) 2002-09-18
WO2001047136A1 (en) 2001-06-28
JP4813724B2 (ja) 2011-11-09

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Legal Events

Date Code Title Description
B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 11A ANUI DADE.

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 2125 DE 27/09/2011.

B15K Others concerning applications: alteration of classification

Ipc: H04W 48/16 (2009.01), H04B 1/7075 (2011.01), H04B