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BR9904500A - Dispositivo receptor para um canal de acesso aleatório de um sistema de comunicação móvel cdma. - Google Patents

Dispositivo receptor para um canal de acesso aleatório de um sistema de comunicação móvel cdma.

Info

Publication number
BR9904500A
BR9904500A BR9904500A BR9904500A BR9904500A BR 9904500 A BR9904500 A BR 9904500A BR 9904500 A BR9904500 A BR 9904500A BR 9904500 A BR9904500 A BR 9904500A BR 9904500 A BR9904500 A BR 9904500A
Authority
BR
Brazil
Prior art keywords
signal
communication system
mobile communication
random access
access channel
Prior art date
Application number
BR9904500A
Other languages
English (en)
Inventor
Tadashi Ogami
Yoshihiro Unno
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 BR9904500A publication Critical patent/BR9904500A/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
    • 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
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • 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

Landscapes

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

Abstract

"DISPOSITIVO DE RECEPTOR PARA UM CANAL DE ACESSO ALEATóRIO DE UM SISTEMA DE COMUNICAçãO MóVEL CDMA". Provê-se um receptor de canal de acesso aleatório usado em uma estação de base de um sistema de comunicação móvel CDMA. O receptor é provido somente com uma parte de decodificação de sinal simples para executar a recepção de sinais recebidos por meio de uma transmissão intermitente de blocos de informação de sinais de requisição de controle possuindo, cada um, um diferente ciclo de defasagem. Um circuito de sincronização calcula o valor de correlação a cada ciclo de defasagem, e um circuito de estabelecimento e determinação de sincronismo determina o ciclo de defasagem a ser usado para um sinal de sincronização para receber o quadro de sinal que chega correntemente por meio de monitoração de valores de correlação de ciclos de defasagem respectivos, e altera o ciclo de defasagem para o sinal de sincronização para melhor qualidade de sinal se uma pluralidade de quadros de sinal de diferentes ciclos de defasagem tiverem chegado. O quadro de sinal de menor qualidade é descartado ou o seu processo de decodificação é abandonado.
BR9904500A 1998-07-28 1999-07-27 Dispositivo receptor para um canal de acesso aleatório de um sistema de comunicação móvel cdma. BR9904500A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21282598A JP3031341B2 (ja) 1998-07-28 1998-07-28 ランダムアクセスチャネル用受信装置

Publications (1)

Publication Number Publication Date
BR9904500A true BR9904500A (pt) 2000-09-12

Family

ID=16628992

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9904500A BR9904500A (pt) 1998-07-28 1999-07-27 Dispositivo receptor para um canal de acesso aleatório de um sistema de comunicação móvel cdma.

Country Status (6)

Country Link
US (1) US6430171B1 (pt)
EP (1) EP0977379A3 (pt)
JP (1) JP3031341B2 (pt)
KR (1) KR100314333B1 (pt)
CN (1) CN1248110A (pt)
BR (1) BR9904500A (pt)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001326584A (ja) 2000-05-18 2001-11-22 Nec Corp パス検出方式と受信装置
JP3445221B2 (ja) * 2000-05-30 2003-09-08 松下電器産業株式会社 無線受信装置および無線受信方法
JP3564108B2 (ja) * 2002-03-08 2004-09-08 イビデン産業株式会社 有線スペクトル拡散通信装置、その通信方法および有線スペクトル拡散通信システム
US6996189B1 (en) * 2002-07-26 2006-02-07 Jabil Circuit, Inc. Symmetric spherical QAM constellation
WO2005064801A1 (en) * 2003-12-23 2005-07-14 Koninklijke Philips Electronics N.V. Decoding method and device
CN101461279B (zh) * 2006-06-01 2014-06-25 华为技术有限公司 移动站与基站之间的连接处理方法、移动站、基站、多载波移动通信系统及随机访问信道的映射方法
JP4929914B2 (ja) * 2006-08-14 2012-05-09 富士通株式会社 無線基地局装置のプリアンブル検出装置
CN101155163B (zh) * 2006-09-29 2010-05-12 鼎桥通信技术有限公司 一种随机接入方法、系统、发射端设备以及接收端设备
ES2370100T3 (es) * 2007-10-29 2011-12-12 Telefonaktiebolaget Lm Ericsson (Publ) Método y disposición en un sistema de telecomunicaciones.
WO2010049842A1 (en) * 2008-10-31 2010-05-06 Koninklijke Philips Electronics N.V. Wideband communication for body-coupled communication systems
US8311081B2 (en) * 2008-12-02 2012-11-13 Electronics And Telecommunications Research Institute Frame synchronization method and receiver for communication modem using the same
DE112019003991T5 (de) * 2018-08-09 2021-04-22 Lg Electronics Inc. Verfahren zum verbessern der messleistungsfähigkeit eines endgeräts in einem drahtloskommunikationssystem und einrichtung dafür

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5446727A (en) * 1993-11-30 1995-08-29 Motorola Inc. Method and apparatus for time aligning signals for reception in a code-division multiple access communication system
JP2734952B2 (ja) * 1993-12-16 1998-04-02 日本電気株式会社 Ｃｄｍａ基地局受信装置
FI96154C (fi) * 1994-05-30 1996-05-10 Nokia Telecommunications Oy Menetelmä tilaajapäätelaitteiden synkronisoimiseksi, tukiasema sekä tilaajapäätelaite
KR0138820B1 (ko) * 1995-05-12 1998-07-01 양승택 Cdma 시스템에서의 무선채널 할당방법 및 그 장치
CA2197341C (en) * 1995-06-13 2007-03-27 Mamoru Sawahashi Acquisition method and system of spreading code
US5671221A (en) * 1995-06-14 1997-09-23 Sharp Microelectronics Technology, Inc. Receiving method and apparatus for use in a spread-spectrum communication system
JPH09271071A (ja) 1996-03-29 1997-10-14 Matsushita Electric Ind Co Ltd 移動通信装置
JP2830911B2 (ja) * 1996-06-07 1998-12-02 日本電気株式会社 移動通信システムおよびその送信電力制御方法、基地局無線装置とそれに使用される上位局
JPH1051424A (ja) 1996-08-05 1998-02-20 N T T Ido Tsushinmo Kk Ｃｄｍａ復調装置
JP2959624B2 (ja) * 1996-08-29 1999-10-06 日本電気株式会社 ランダムアクセス制御方式
JP3373746B2 (ja) * 1997-01-07 2003-02-04 株式会社鷹山 Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式における初期同期方法および受信機
US6038450A (en) * 1997-09-12 2000-03-14 Lucent Technologies, Inc. Soft handover system for a multiple sub-carrier communication system and method thereof

Also Published As

Publication number Publication date
US6430171B1 (en) 2002-08-06
EP0977379A3 (en) 2003-01-02
KR20000012033A (ko) 2000-02-25
EP0977379A2 (en) 2000-02-02
CN1248110A (zh) 2000-03-22
JP3031341B2 (ja) 2000-04-10
JP2000049659A (ja) 2000-02-18
KR100314333B1 (ko) 2001-11-22

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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 5A,6A,7A E 8A 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 1928 DE 18/12/2007.

B15K Others concerning applications: alteration of classification

Free format text: PROCEDIMENTO AUTOMATICO DE RECLASSIFICACAO. A CLASSIFICACAO IPC ANTERIOR ERA H04Q 7/30.

Ipc: H04B 1/7075 (2011.01), H04B 1/707 (2011.01), H04B

Ipc: H04B 1/7075 (2011.01), H04B 1/707 (2011.01), H04B