ES2613954T3 - Búsqueda de celda inicial en sistemas de comunicación inalámbrica - Google Patents
Búsqueda de celda inicial en sistemas de comunicación inalámbrica Download PDFInfo
- Publication number
- ES2613954T3 ES2613954T3 ES07102508.4T ES07102508T ES2613954T3 ES 2613954 T3 ES2613954 T3 ES 2613954T3 ES 07102508 T ES07102508 T ES 07102508T ES 2613954 T3 ES2613954 T3 ES 2613954T3
- Authority
- ES
- Spain
- Prior art keywords
- correlator
- psc
- peak
- conjugate
- magnitude
- 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.)
- Expired - Lifetime
Links
- 238000000034 method Methods 0.000 abstract description 4
- 238000011156 evaluation Methods 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 1
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
- H04B1/70735—Code identification
-
- 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
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/20—Selecting an access point
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
-
- 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
- H04B1/70755—Setting of lock conditions, e.g. threshold
-
- 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
- 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
- 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
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Computer Security & Cryptography (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Un método para identificar un grupo de códigos representativo de un número predeterminado de estaciones base que pueden incluir una estación de base con la cual una unidad de transmisión/recepción puede sincronizar para comunicarse, que comprende: introducción de un desplazamiento de chip dentro de una trama en un primer correlador (502); introducción de múltiples muestras de chips en las cuales un código de sincronización primaria, PSC, ha sido detectado dentro del primer correlador; estando el método caracterizado por lo siguiente: la introducción de un pico del PSC en un segundo correlador (518) y la toma del conjugado complejo del PSC para producir un conjugado de pico del PSC; la multiplicación de la salida del primer correlador por dicho conjugado de pico del PSC para obtener una magnitud para las señales que se transmiten en la entrada de los chips en el primer correlador; la suma de la magnitud a través de las cuatro tramas; la evaluación de la vista de las señales sumadas de un conjunto predeterminado de variables de decisión; y la determinación de un grupo de códigos, una ubicación de intervalo de tiempo, y número de trama del sistema basado en dicha evaluación y sobre un valor de estimación del ruido.
Description
8. Un método para detectar una señal de canal de sincronización transmitida en un intervalo de tiempo seleccionado de un sistema a una velocidad de chip predeterminada con una señal de comunicación recibida cuya muestra es tomada al doble de la velocidad de chip, método éste que comprende las siguientes etapas:
identificación de un desplazamiento de chip dentro de un período de tiempo que tiene un valor de potencia máximo;
5 determinación de si el desplazamiento de chip surgió a partir de una muestra par o de una muestra impar en donde se identifica la ubicación de chip mediante el procesamiento de la señal de comunicación inalámbrica al doble de la velocidad de chip;
determinación de si el valor de potencia máxima sobrepasa el valor de umbral predeterminado; y
extracción del desplazamiento de chip de modo que el desplazamiento de chip corresponda al inicio del canal de 10 sincronización en donde el valor de potencia máxima sobrepase el valor del umbral predeterminado.
9. Una unidad de transmisión/recepción inalámbrica (WTRU) configurada para comunicarse con estaciones base de un sistema inalámbrico en donde cada estación base transmite una señal identificatoria del canal de sincronización (SCH) en una porción seleccionada de un período de tiempo del sistema, comprendiendo la WTRU:
un receptor configurado para recibir una señal inalámbrica incluyendo, por lo menos, una señal del SCH;
15 por lo menos un correlador configurado para identificar las señales del SCH recibidas usando un umbral de potencia basado en múltiples muestras de chip tomadas al doble de la velocidad de chip;
un procesador para seleccionar una señal de SCH identificada para decodificación;
un procesador para decodificar la señal del SCH seleccionada para determinar la temporización del período de tiempo del sistema y la identidad de la estación base mediante la determinación de un inicio de la señal del SCH identificando 20 una ubicación de chip que tenga una relación señal/ruido más alta, en donde el ruido se calcule usando un número predeterminado de chips que sea menor que la cantidad total de chips en una trama.
9
Claims (1)
-
imagen1
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US44533103P | 2003-02-05 | 2003-02-05 | |
US445331P | 2003-02-05 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2613954T3 true ES2613954T3 (es) | 2017-05-29 |
Family
ID=32869348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES07102508.4T Expired - Lifetime ES2613954T3 (es) | 2003-02-05 | 2004-02-05 | Búsqueda de celda inicial en sistemas de comunicación inalámbrica |
Country Status (11)
Country | Link |
---|---|
US (2) | US7444144B2 (es) |
EP (3) | EP1595346A4 (es) |
JP (1) | JP4195901B2 (es) |
KR (6) | KR100758190B1 (es) |
CN (3) | CN1745527B (es) |
CA (1) | CA2513442A1 (es) |
ES (1) | ES2613954T3 (es) |
HU (1) | HUE033067T2 (es) |
MX (1) | MXPA05008320A (es) |
NO (1) | NO20053912L (es) |
WO (1) | WO2004073321A2 (es) |
Families Citing this family (28)
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JP3581357B2 (ja) * | 2002-05-22 | 2004-10-27 | 松下電器産業株式会社 | 通信端末装置及び拡散コード推定方法 |
US7006840B2 (en) | 2003-09-30 | 2006-02-28 | Interdigital Technology Corporation | Efficient frame tracking in mobile receivers |
US7570689B2 (en) * | 2005-02-14 | 2009-08-04 | Interdigital Technology Corporation | Advanced receiver with sliding window block linear equalizer |
JP4603946B2 (ja) * | 2005-07-22 | 2010-12-22 | 株式会社日立国際電気 | 送信ダイバーシチモード検出装置 |
US7450944B2 (en) * | 2005-11-03 | 2008-11-11 | Motorola, Inc. | Method and apparatus for base station synchronization |
US8649365B2 (en) * | 2006-01-06 | 2014-02-11 | Nokia Corporation | Dedicated synchronization signal for OFDMA system |
JP5156745B2 (ja) | 2006-07-25 | 2013-03-06 | 韓國電子通信研究院 | 無線通信システムで順方向同期信号伝送方法、セル識別子検出方法及びこれを利用する装置及び順方向リンクフレーム構造 |
GB2458418B (en) * | 2006-12-19 | 2011-08-03 | Lg Electronics Inc | Sequence generating method for efficient detection and method for transmitting and receiving signals using the same |
KR100938756B1 (ko) | 2007-07-06 | 2010-01-26 | 엘지전자 주식회사 | 무선통신 시스템에서 셀 탐색 과정을 수행하는 방법 |
WO2009045244A1 (en) * | 2007-09-28 | 2009-04-09 | Thomson Licensing | Time-frequency synchronization and frame number detection for dmb-t systems |
RU2452120C2 (ru) * | 2007-10-10 | 2012-05-27 | Квэлкомм Инкорпорейтед | Эффективные схемы идентификации системы для систем связи |
US9119132B2 (en) | 2007-10-10 | 2015-08-25 | Qualcomm Incorporated | Efficient system identification schemes for communication systems |
EP2051395B1 (en) | 2007-10-15 | 2016-04-13 | Telefonaktiebolaget LM Ericsson (publ) | Communication device and method |
EP2075973B1 (en) * | 2007-12-28 | 2018-08-15 | Telefonaktiebolaget LM Ericsson (publ) | Identification of a sequence of received reference symbols |
US20100002678A1 (en) * | 2008-07-02 | 2010-01-07 | Kabushiki Kaisha Toshiba | Mobile radio terminal and radio communication method |
ATE545221T1 (de) * | 2008-09-05 | 2012-02-15 | Ericsson Telefon Ab L M | Technik zum synchronisieren eines endgeräts mit einem drahtlosen netz |
US8577378B2 (en) * | 2009-02-10 | 2013-11-05 | Qualcomm Incorporated | Method and apparatus for facilitating a beacon-assisted handover to a home Node-B for users on an active call |
WO2010123295A2 (ko) * | 2009-04-24 | 2010-10-28 | 한국전자통신연구원 | 셀룰라 무선 통신 시스템에서의 협력 통신 방법 및 이를 수행하는 단말기 |
CN101883379B (zh) * | 2009-05-05 | 2012-12-26 | 上海摩波彼克半导体有限公司 | 无线通信系统实现无线终端邻小区两阶段测量优化的方法 |
US8989061B2 (en) * | 2009-06-16 | 2015-03-24 | Qualcomm Incorporated | Methods and apparatus for initial acquisition in a communication system |
EP2328286B1 (en) | 2009-11-30 | 2012-10-17 | ST-Ericsson SA | Process for slot synchronization of the p-sch sequence in a umts communication system, and a receiver for the same |
CN101895384A (zh) * | 2010-07-07 | 2010-11-24 | 中兴通讯股份有限公司 | 一种实现边界时钟的方法和装置 |
US8954055B2 (en) * | 2011-11-10 | 2015-02-10 | Qualcomm Incorporated | Initial acquisition and neighbor search algorithms for wireless networks |
US9094241B2 (en) * | 2011-12-28 | 2015-07-28 | Intel Corporation | Channel estimation processing for performance improvement in low SNR regime |
KR101924830B1 (ko) * | 2012-06-19 | 2019-02-27 | 삼성전자주식회사 | 무선 통신 네트워크에서 단말의 동기화 방법 및 장치 |
US8825048B2 (en) * | 2012-10-22 | 2014-09-02 | Qualcomm Incorporated | Method and apparatus for determining base station identity |
WO2014163544A1 (en) * | 2013-04-05 | 2014-10-09 | Telefonaktiebolaget L M Ericsson (Publ) | Apparatus and method for jointly selecting the tap values and delays of the|fingers for a rake receiver of two carriers |
KR102268110B1 (ko) * | 2014-08-05 | 2021-06-22 | 삼성전자주식회사 | 데이터를 변조하는 방법 및 장치 및 기록 매체 |
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US5246673A (en) * | 1988-12-21 | 1993-09-21 | Troy Investments Inc. | Delta singlet oxygen continuous reactor |
WO1993001711A1 (en) | 1991-07-16 | 1993-02-04 | Novosibirsky Gosudarstvenny Agrarny Universitet | Method and installation for processing pig manure into protein forage and biohumus |
SE9404121L (sv) | 1994-11-29 | 1995-12-04 | Telia Ab | Metod för synkronisering av sändare och mottagare vid mobilt radiosystem |
US5696766A (en) * | 1995-06-02 | 1997-12-09 | Dsc Communications Corporation | Apparatus and method of synchronizing a transmitter in a subscriber terminal of a wireless telecommunications system |
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KR100532328B1 (ko) * | 1998-08-29 | 2006-03-23 | 삼성전자주식회사 | 부호분할다중접속통신시스템의피.엔시퀀스식별장치 |
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KR100319927B1 (ko) * | 2000-01-11 | 2002-01-09 | 윤종용 | 비동기식 광대역 직접 시퀀스 코드분할다중접속 수신기의셀 탐색 장치 및 각 셀에 고유한 코드 획득 방법 |
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US7173992B2 (en) * | 2001-12-11 | 2007-02-06 | Sasken Communication Technologies Limited | Method for synchronization in wireless systems using receive diversity |
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US7369577B2 (en) * | 2002-05-16 | 2008-05-06 | Stmicroelectronics, Inc. | Code group acquisition procedure for a UMTS-FDD receiver |
US7194011B1 (en) * | 2002-08-31 | 2007-03-20 | National Semiconductor Corporation | 3GPP WCDMA receiver using pipelined apparatus and method for performing cell searches |
US7633976B2 (en) * | 2002-09-19 | 2009-12-15 | Industrial Technology Research Institute | Method and apparatus for code group identification and frame synchronization by use of Reed-Solomon decoder and reliability measurement for UMTS W-CDMA |
-
2004
- 2004-02-05 CN CN200480003389.XA patent/CN1745527B/zh not_active Expired - Fee Related
- 2004-02-05 ES ES07102508.4T patent/ES2613954T3/es not_active Expired - Lifetime
- 2004-02-05 KR KR1020057014377A patent/KR100758190B1/ko active IP Right Grant
- 2004-02-05 KR KR1020097002408A patent/KR20090032110A/ko not_active IP Right Cessation
- 2004-02-05 CN CN200910171051.XA patent/CN101656554B/zh not_active Expired - Fee Related
- 2004-02-05 KR KR1020097017244A patent/KR20090108089A/ko not_active IP Right Cessation
- 2004-02-05 WO PCT/US2004/003207 patent/WO2004073321A2/en active Application Filing
- 2004-02-05 KR KR1020057017341A patent/KR100950904B1/ko not_active IP Right Cessation
- 2004-02-05 KR KR1020077009048A patent/KR100950906B1/ko not_active IP Right Cessation
- 2004-02-05 JP JP2006501131A patent/JP4195901B2/ja not_active Expired - Lifetime
- 2004-02-05 EP EP04708578A patent/EP1595346A4/en not_active Withdrawn
- 2004-02-05 CA CA002513442A patent/CA2513442A1/en not_active Abandoned
- 2004-02-05 CN CN200910171050.5A patent/CN101656553B/zh not_active Expired - Fee Related
- 2004-02-05 MX MXPA05008320A patent/MXPA05008320A/es not_active Application Discontinuation
- 2004-02-05 EP EP07102508.4A patent/EP1780920B8/en not_active Expired - Lifetime
- 2004-02-05 US US10/772,644 patent/US7444144B2/en active Active
- 2004-02-05 EP EP08161043A patent/EP1978662A1/en not_active Withdrawn
- 2004-02-05 HU HUE07102508A patent/HUE033067T2/hu unknown
- 2004-02-05 KR KR1020077009049A patent/KR100950905B1/ko not_active IP Right Cessation
-
2005
- 2005-08-22 NO NO20053912A patent/NO20053912L/no not_active Application Discontinuation
-
2008
- 2008-10-27 US US12/258,877 patent/US8086228B2/en active Active
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