BR9914324A - Receptor de espectro expandido de sequência direta para operar em um canal de multipercursos e métodos de processar um sinal recebido em um canal de desvanecimento de multipercursos e de inicializar informação de demodulação correspondendo a um percurso de canal - Google Patents
Receptor de espectro expandido de sequência direta para operar em um canal de multipercursos e métodos de processar um sinal recebido em um canal de desvanecimento de multipercursos e de inicializar informação de demodulação correspondendo a um percurso de canalInfo
- Publication number
- BR9914324A BR9914324A BR9914324-0A BR9914324A BR9914324A BR 9914324 A BR9914324 A BR 9914324A BR 9914324 A BR9914324 A BR 9914324A BR 9914324 A BR9914324 A BR 9914324A
- Authority
- BR
- Brazil
- Prior art keywords
- channel
- delays
- delay
- multipath
- received signal
- Prior art date
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
- 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
- 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
- H04B1/7097—Interference-related aspects
- H04B1/711—Interference-related aspects the interference being multi-path interference
- H04B1/7113—Determination of path profile
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Noise Elimination (AREA)
- Radio Transmission System (AREA)
- Semiconductor Lasers (AREA)
- Stereophonic System (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Dc Digital Transmission (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
- Electrotherapy Devices (AREA)
- Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
Abstract
"RECEPTOR DE ESPECTRO EXPANDIDO DE SEQuêNCIA DIRETA PARA OPERAR EM UM CANAL DE MULTIPERCURSOS E MéTODOS DE PROCESSAR UM SINAL RECEBIDO EM UM CANAL DE DESVANECIMENTO DE MULTIPERCURSOS E DE INICIALIZAR INFORMAçãO DE DEMODULAçãO CORRESPONDENDO A UM PERCURSO DE CANAL". Um receptor de espectro expandido de seq³ência direta para a operação em um canal de desvanecimento de multipercursos compreende um receptor de varredura tendo dedos de varredura plurais. Cada dedo de varredura demodula um sinal recebido de um dos percursos de canal plurais. A sai dos dedos de varredura plurais são combinadas. Cada dedo de varredura utiliza um retardo designado selecionado para sincronizar-se com um retardo de um percurso de canal. Um buscador executa periodicamente uma busca de canal no sinal recebido ara detectar novos retardos de percursos mais fortes no canal. Rastreadores plurais, um para cada percurso de canal, ajustam os retardos designados selecionados entre buscas executadas pelo buscador. Um controlador de retardo é operativamente acoplado ao buscador e ao rastreador. O controlador de retardo copara novos retardos dos percursos mais fortes do buscador para os retardos designados selecionados e redesigna um dos retardos designados selecionados com um dos novos retardos, apenas se o novo retardo diferir do um retardo designado selecionado por mais do que uma quantidade mínima previamente selecionada.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/168,233 US6560273B1 (en) | 1998-10-07 | 1998-10-07 | Delay searcher and delay trackers interaction for new delays assignment to rake fingers |
PCT/US1999/022437 WO2000021201A2 (en) | 1998-10-07 | 1999-09-28 | Delay searcher and delay trackers interaction for new delays assignment to rake fingers |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9914324A true BR9914324A (pt) | 2001-06-26 |
Family
ID=22610657
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9914324-0A BR9914324A (pt) | 1998-10-07 | 1999-09-28 | Receptor de espectro expandido de sequência direta para operar em um canal de multipercursos e métodos de processar um sinal recebido em um canal de desvanecimento de multipercursos e de inicializar informação de demodulação correspondendo a um percurso de canal |
Country Status (11)
Country | Link |
---|---|
US (2) | US6560273B1 (pt) |
EP (1) | EP1119921B1 (pt) |
JP (1) | JP3511009B2 (pt) |
CN (1) | CN100385813C (pt) |
AT (1) | ATE271281T1 (pt) |
AU (1) | AU6402899A (pt) |
BR (1) | BR9914324A (pt) |
DE (1) | DE69918704D1 (pt) |
EE (1) | EE200100208A (pt) |
HK (1) | HK1046071B (pt) |
WO (1) | WO2000021201A2 (pt) |
Families Citing this family (34)
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SE521039C2 (sv) * | 1997-10-21 | 2003-09-23 | Telia Ab | Kanalsimulator för mobila system |
US6560273B1 (en) | 1998-10-07 | 2003-05-06 | Ericsson Inc. | Delay searcher and delay trackers interaction for new delays assignment to rake fingers |
US6873648B1 (en) * | 2000-03-02 | 2005-03-29 | Telefonaktiebolaget L M Ericsson (Publ) | Method and apparatus for fast detection of locations of path rays in a receiver having multiple time references |
US6823021B1 (en) * | 2000-10-27 | 2004-11-23 | Greenwich Technologies Associates | Method and apparatus for space division multiple access receiver |
US6956841B1 (en) | 2000-05-24 | 2005-10-18 | Nokia Networks Oy | Receiver and method of receiving a desired signal |
WO2001097423A1 (fr) | 2000-06-15 | 2001-12-20 | Sanyo Electric Co., Ltd. | Dispositif et procede de reception |
GB2365269B (en) | 2000-07-28 | 2004-09-08 | Nokia Mobile Phones Ltd | Method and apparatus for synchronization |
US7065130B1 (en) | 2000-10-02 | 2006-06-20 | Telefonaktiebolaget Lm Ericsson (Publ) | Searching for signals in a communications system |
US6771692B2 (en) * | 2001-01-11 | 2004-08-03 | Qualcomm Incorporated | Time tracking in a non-negligible multipath spacing environment |
JP3866535B2 (ja) * | 2001-06-26 | 2007-01-10 | 株式会社東芝 | 符号分割多重通信装置及びその伝送路補正タイミング制御方法 |
US7430191B2 (en) * | 2001-09-10 | 2008-09-30 | Qualcomm Incorporated | Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system |
TWI261468B (en) * | 2001-11-02 | 2006-09-01 | Benq Corp | Rake reception device and method |
US7236515B1 (en) * | 2001-11-19 | 2007-06-26 | Sprint Spectrum L.P. | Forward link time delay for distributed antenna system |
US6728304B2 (en) * | 2001-12-18 | 2004-04-27 | Motorola, Inc. | Method and apparatus for performing a signal detection and assignment in a wireless communication system |
TWI236245B (en) * | 2002-03-07 | 2005-07-11 | Benq Corp | Method of tracking finger assignment |
US7061967B2 (en) * | 2002-06-24 | 2006-06-13 | Comsys Communication & Signal Processing Ltd. | Multipath channel tap delay estimation in a CDMA spread spectrum receiver |
DE60334547D1 (de) * | 2002-08-21 | 2010-11-25 | Nxp Bv | Verzögerungsleitung für den Empfang von Mehrfachausbreitungswegen |
US7197063B2 (en) * | 2002-09-18 | 2007-03-27 | Telefonaktiebolaget Lm Ericsson (Publ) | Advanced rake delay control |
AU2003259590A1 (en) | 2003-01-23 | 2004-08-12 | Nec Australia Pty Ltd | Cell search method and apparatus in a WCDMA system |
US7184492B2 (en) | 2003-02-10 | 2007-02-27 | Ericsson Inc. | Using antenna arrays in multipath environment |
JP2004320317A (ja) * | 2003-04-15 | 2004-11-11 | Nec Corp | レイク受信装置およびレイク受信方法 |
US7474648B2 (en) | 2003-06-18 | 2009-01-06 | Telefonaktiebolaget L M Ericsson (Publ) | Filtering multipath propagation delay values for use in a mobile communications system |
DE60325738D1 (de) * | 2003-11-22 | 2009-02-26 | Alcatel Lucent | Verfahren zur Ermittlung der Verzögerungen in einem Mehrpfad-Kanal |
US20060067383A1 (en) * | 2004-09-29 | 2006-03-30 | Carmela Cozzo | Parameter estimate initialization using interpolation |
US7480356B2 (en) * | 2004-12-08 | 2009-01-20 | Telefonaktiebolaget L M Ericsson (Publ) | Method of and system for path selection in rich multipath conditions |
US7372895B2 (en) * | 2004-12-08 | 2008-05-13 | Telefonaktiebolaget Lm Ericsson (Publ) | Method of and system for delay estimation with minimized finger allocation |
US20070019585A1 (en) * | 2005-07-22 | 2007-01-25 | Industrial Technology Research Institute | Apparatus for path selection and signal processing in wireless communications system |
US20070021086A1 (en) * | 2005-07-22 | 2007-01-25 | Industrial Technology Research Institute | Method for path selection and signal processing in wireless communications system |
US7693241B2 (en) * | 2005-10-31 | 2010-04-06 | Qualcomm Incorporated | Rake receiver finger assignment based on signal path concentration |
US8184675B2 (en) | 2006-07-12 | 2012-05-22 | Telefonaktiebolaget L M Ericsson (Publ) | Residual frequency offset exploitation |
EP2076971A2 (en) * | 2006-10-12 | 2009-07-08 | Nxp B.V. | Selection scheme for selecting a peak in a correlati0n signal |
US8126031B2 (en) * | 2007-08-07 | 2012-02-28 | Qualcomm Incorporated | Time-tracking management of demodulation elements in a receive diversity enabled rake receiver |
US8320489B2 (en) * | 2009-02-20 | 2012-11-27 | Wisconsin Alumni Research Foundation | Determining channel coefficients in a multipath channel |
KR102588642B1 (ko) * | 2017-02-14 | 2023-10-11 | 한국전자통신연구원 | 스텝핑 스톤 검출 장치 및 방법 |
Family Cites Families (25)
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EP0701753B1 (en) * | 1993-06-04 | 2001-09-26 | Motorola, Inc. | A communication method for an adaptive direct sequence cdma communication system |
US5490165A (en) | 1993-10-28 | 1996-02-06 | Qualcomm Incorporated | Demodulation element assignment in a system capable of receiving multiple signals |
FI940692A (fi) | 1994-02-14 | 1995-08-15 | Nokia Mobile Phones Ltd | Menetelmä impulssivasteen huippukohtien etsimiseksi sekä vastaanotin |
US5627863A (en) | 1994-07-15 | 1997-05-06 | Amati Communications Corporation | Frame synchronization in multicarrier transmission systems |
JP2605648B2 (ja) | 1994-12-22 | 1997-04-30 | 日本電気株式会社 | Ss受信機における逆拡散符号位相検出装置 |
US5764687A (en) * | 1995-06-20 | 1998-06-09 | Qualcomm Incorporated | Mobile demodulator architecture for a spread spectrum multiple access communication system |
FI100494B (fi) | 1995-11-20 | 1997-12-15 | Nokia Telecommunications Oy | Menetelmä vastaanottimen ohjaamiseksi ja vastaanotin |
JP3745430B2 (ja) | 1995-12-22 | 2006-02-15 | 株式会社エヌ・ティ・ティ・ドコモ | Cdmaマルチパス・サーチ方法及びcdma信号受信装置 |
JP2820918B2 (ja) * | 1996-03-08 | 1998-11-05 | 株式会社ワイ・アール・ピー移動通信基盤技術研究所 | スペクトル拡散通信装置 |
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JP3308449B2 (ja) | 1996-06-04 | 2002-07-29 | 沖電気工業株式会社 | 同期捕捉回路 |
US6026115A (en) * | 1996-08-23 | 2000-02-15 | Ntt Mobile Communications Network, Inc. | Rake receiver |
JP2762996B1 (ja) | 1996-12-11 | 1998-06-11 | 日本電気株式会社 | 受信装置 |
JP2853705B2 (ja) | 1997-05-07 | 1999-02-03 | 日本電気株式会社 | スペクトラム拡散通信受信機 |
JP2853742B2 (ja) * | 1997-06-10 | 1999-02-03 | 日本電気株式会社 | 直接拡散/符号分割多重方式干渉除去受信装置 |
US6345078B1 (en) | 1997-07-31 | 2002-02-05 | Lucent Technologies Inc. | Finger assignment system for a multiple finger receiver and method thereof |
US6134260A (en) * | 1997-12-16 | 2000-10-17 | Ericsson Inc. | Method and apparatus for frequency acquisition and tracking for DS-SS CDMA receivers |
US6839378B1 (en) | 1998-01-12 | 2005-01-04 | Ericsson, Inc. | Method and apparatus for multipath delay estimation in direct sequence spread spectrum communication systems |
US6643275B1 (en) * | 1998-05-15 | 2003-11-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Random access in a mobile telecommunications system |
US6157820A (en) * | 1998-06-12 | 2000-12-05 | Ericsson Inc. | Pilot strength measurement and multipath delay searcher for CDMA receiver |
US6590886B1 (en) * | 1998-07-17 | 2003-07-08 | Qualcomm, Incorporated | Technique for reduction of awake time in a wireless communication device utilizing slotted paging |
US6560273B1 (en) | 1998-10-07 | 2003-05-06 | Ericsson Inc. | Delay searcher and delay trackers interaction for new delays assignment to rake fingers |
US6330271B1 (en) * | 1998-10-13 | 2001-12-11 | Telefonaktiebolaget Lm Ericsson (Publ) | CDMA receiver that shares a tracking device among multiple rake branches |
US6212398B1 (en) * | 1998-12-03 | 2001-04-03 | Ericsson Inc. | Wireless telephone that rapidly reacquires a timing reference from a wireless network after a sleep mode |
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-
1998
- 1998-10-07 US US09/168,233 patent/US6560273B1/en not_active Expired - Lifetime
-
1999
- 1999-09-28 EP EP99951626A patent/EP1119921B1/en not_active Expired - Lifetime
- 1999-09-28 CN CNB998119296A patent/CN100385813C/zh not_active Expired - Fee Related
- 1999-09-28 EE EEP200100208A patent/EE200100208A/xx unknown
- 1999-09-28 BR BR9914324-0A patent/BR9914324A/pt not_active IP Right Cessation
- 1999-09-28 AT AT99951626T patent/ATE271281T1/de not_active IP Right Cessation
- 1999-09-28 WO PCT/US1999/022437 patent/WO2000021201A2/en active IP Right Grant
- 1999-09-28 DE DE69918704T patent/DE69918704D1/de not_active Expired - Lifetime
- 1999-09-28 JP JP2000575223A patent/JP3511009B2/ja not_active Expired - Lifetime
- 1999-09-28 AU AU64028/99A patent/AU6402899A/en not_active Abandoned
-
2002
- 2002-10-17 HK HK02107564.9A patent/HK1046071B/zh not_active IP Right Cessation
-
2003
- 2003-02-13 US US10/365,857 patent/US6891883B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
CN1346546A (zh) | 2002-04-24 |
HK1046071A1 (en) | 2002-12-20 |
ATE271281T1 (de) | 2004-07-15 |
CN100385813C (zh) | 2008-04-30 |
DE69918704D1 (de) | 2004-08-19 |
JP2002527925A (ja) | 2002-08-27 |
EP1119921B1 (en) | 2004-07-14 |
JP3511009B2 (ja) | 2004-03-29 |
WO2000021201A3 (en) | 2000-08-31 |
US6560273B1 (en) | 2003-05-06 |
HK1046071B (zh) | 2008-12-24 |
WO2000021201A2 (en) | 2000-04-13 |
EE200100208A (et) | 2002-06-17 |
US20030128745A1 (en) | 2003-07-10 |
AU6402899A (en) | 2000-04-26 |
US6891883B2 (en) | 2005-05-10 |
EP1119921A2 (en) | 2001-08-01 |
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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 AO NAO RECOLHIMENTO DA 8A ANUIDADE(S). |
|
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 DA RPI 1999 DE 28/04/2009. |