BR0215943A - Receptor de comunicação digital de espectro espalhado e método para a estimação da energia de perfil de atraso de canal em um receptor de comunicação digital de espectro espalhado - Google Patents
Receptor de comunicação digital de espectro espalhado e método para a estimação da energia de perfil de atraso de canal em um receptor de comunicação digital de espectro espalhadoInfo
- Publication number
- BR0215943A BR0215943A BR0215943-0A BR0215943A BR0215943A BR 0215943 A BR0215943 A BR 0215943A BR 0215943 A BR0215943 A BR 0215943A BR 0215943 A BR0215943 A BR 0215943A
- Authority
- BR
- Brazil
- Prior art keywords
- input
- spread spectrum
- digital communication
- communication receiver
- delay profile
- 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
- H04B1/709—Correlator structure
- H04B1/7093—Matched filter type
-
- 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
-
- 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
- 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)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Communication Control (AREA)
- Mobile Radio Communication Systems (AREA)
- Channel Selection Circuits, Automatic Tuning Circuits (AREA)
Abstract
"RECEPTOR DE COMUNICAçãO DIGITAL DE ESPECTRO ESPALHADO E MéTODO PARA A ESTIMAçãO DA ENERGIA DE PERFIL DE ATRASO DE CANAL EM UM RECEPTOR DE COMUNICAçãO DIGITAL DE ESPECTRO ESPALHADO". Um receptor de comunicação digital de espectro espalhado, do tipo incluindo uma memória temporária de entrada (16) para armazenar amostras de um sinal de entrada (y(k)) e um circuito de gerador de código (30) para gerar um código de usuário gerado novamente, incorpora um dispositivo (24) para a estimação de um perfil de atraso de canal inclui: um correlator básico (32) tendo uma primeira entrada (41) para ler seq³encialmente de um local de memória da memória temporária de entrada (16) uma pluralidade de amostras do sinal de entrada (y(k)), uma segunda entrada (43) para receber do circuito de gerador de código (30) um código de usuário gerado novamente, e um terminal de saída para gerar, por meio de uma operação de correlação entre a pluralidade de amostras do sinal de entrada e o código de usuário gerado novamente, um primeiro valor da energia de perfil de atraso de canal (DP(1)); e um circuito de controlador de memória (36) para endereçar dita memória temporária (16), de forma que a primeira entrada (41) do correlator básico (32) seja alimentada sucessivamente com o conteúdo de vários locais de memória da memória temporária (16), cada operação de endereçamento correspondendo a uma nova operação de correlação do correlator básico (32) para a computação de um novo valor da energia de perfil de atraso de canal (DP(1)).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2002/012815 WO2004047328A1 (en) | 2002-11-15 | 2002-11-15 | Memory based device and method for channel estimation in a digital communication receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
BR0215943A true BR0215943A (pt) | 2005-09-06 |
Family
ID=32319524
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR0215943-0A BR0215943A (pt) | 2002-11-15 | 2002-11-15 | Receptor de comunicação digital de espectro espalhado e método para a estimação da energia de perfil de atraso de canal em um receptor de comunicação digital de espectro espalhado |
Country Status (10)
Country | Link |
---|---|
US (1) | US7577184B2 (pt) |
EP (1) | EP1561288B1 (pt) |
JP (1) | JP4237705B2 (pt) |
CN (1) | CN100395960C (pt) |
AT (1) | ATE389975T1 (pt) |
AU (1) | AU2002352021A1 (pt) |
BR (1) | BR0215943A (pt) |
CA (1) | CA2509161A1 (pt) |
DE (1) | DE60225729T2 (pt) |
WO (1) | WO2004047328A1 (pt) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6748481B1 (en) * | 1999-04-06 | 2004-06-08 | Microsoft Corporation | Streaming information appliance with circular buffer for receiving and selectively reading blocks of streaming information |
US7298799B1 (en) * | 2004-03-08 | 2007-11-20 | Redpine Signals, Inc. | All-tap fractionally spaced, serial rake combiner apparatus and method |
US7536158B2 (en) * | 2004-03-29 | 2009-05-19 | Telefonaktiebolaget Lm Ericsson (Publ) | Impairment correlation estimation in a spread spectrum system |
US8032095B1 (en) | 2005-03-03 | 2011-10-04 | Marvell International Ltd. | Method and apparatus for detecting carrier leakage in a wireless or similar system |
CN101064581B (zh) * | 2006-04-27 | 2012-07-04 | 上海宣普实业有限公司 | 一种解扰解扩的方法与装置 |
US7599454B2 (en) * | 2006-07-24 | 2009-10-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for symbol alignment in diversity signal reception |
WO2013000126A1 (zh) * | 2011-06-28 | 2013-01-03 | 中兴通讯股份有限公司 | 一种测量方法及装置 |
CN103795437B (zh) * | 2012-10-31 | 2018-03-13 | 中兴通讯股份有限公司 | 选择多径延迟的方法和装置 |
Family Cites Families (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5768306A (en) * | 1993-09-06 | 1998-06-16 | Ntt Mobile Communications Network, Inc. | Sliding correlator used in CDMA systems to establish initial synchronization |
CA2148594C (en) | 1993-09-06 | 1999-08-10 | Mamoru Sawahashi | Sliding correlator |
US5715276A (en) * | 1996-08-22 | 1998-02-03 | Golden Bridge Technology, Inc. | Symbol-matched filter having a low silicon and power requirement |
JP2856198B2 (ja) * | 1997-06-11 | 1999-02-10 | 日本電気株式会社 | スペクトラム拡散受信機 |
US6731622B1 (en) * | 1998-05-01 | 2004-05-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Multipath propagation delay determining means using periodically inserted pilot symbols |
US6643275B1 (en) * | 1998-05-15 | 2003-11-04 | Telefonaktiebolaget Lm Ericsson (Publ) | Random access in a mobile telecommunications system |
US6363104B1 (en) * | 1998-10-02 | 2002-03-26 | Ericsson Inc. | Method and apparatus for interference cancellation in a rake receiver |
DE19845620A1 (de) * | 1998-10-05 | 2000-04-27 | Systemonic Ag | Verfahren zum Empfang von Spreizspektrumsignalen |
JP3680592B2 (ja) | 1998-10-30 | 2005-08-10 | 株式会社日立製作所 | 通信装置 |
JP3777475B2 (ja) | 1999-02-24 | 2006-05-24 | 株式会社日立国際電気 | スペクトラム拡散通信用相関回路及び復調回路及び受信装置 |
DE19955757A1 (de) * | 1999-11-19 | 2001-06-21 | Infineon Technologies Ag | Programmierbare Synchronisiereinheit für einen Signalempfänger |
GB2357406B (en) * | 1999-12-14 | 2004-01-21 | Nokia Mobile Phones Ltd | Combiner |
US7103095B2 (en) * | 2000-03-06 | 2006-09-05 | Texas Instruments Incorporated | Spread spectrum code correlator |
WO2002011309A1 (en) * | 2000-07-31 | 2002-02-07 | Morphics Technology, Inc. | Generic finger architecture for spread spectrum applications |
AU2001288233A1 (en) * | 2000-08-03 | 2002-02-18 | Morphics Technology, Inc. | Flexible preamble processing |
JP3421314B2 (ja) * | 2000-10-04 | 2003-06-30 | 松下電器産業株式会社 | パス選択装置及びパス選択方法 |
JP2002232322A (ja) | 2001-02-02 | 2002-08-16 | Fujitsu Ltd | 整合フィルタおよびサーチャ |
JP3840412B2 (ja) * | 2001-12-28 | 2006-11-01 | 株式会社日立製作所 | 無線端末装置 |
-
2002
- 2002-11-15 EP EP02787696A patent/EP1561288B1/en not_active Expired - Lifetime
- 2002-11-15 DE DE60225729T patent/DE60225729T2/de not_active Expired - Lifetime
- 2002-11-15 WO PCT/EP2002/012815 patent/WO2004047328A1/en active IP Right Grant
- 2002-11-15 CA CA002509161A patent/CA2509161A1/en not_active Abandoned
- 2002-11-15 US US10/534,996 patent/US7577184B2/en not_active Expired - Fee Related
- 2002-11-15 CN CNB02829887XA patent/CN100395960C/zh not_active Expired - Fee Related
- 2002-11-15 AT AT02787696T patent/ATE389975T1/de not_active IP Right Cessation
- 2002-11-15 AU AU2002352021A patent/AU2002352021A1/en not_active Abandoned
- 2002-11-15 JP JP2004552438A patent/JP4237705B2/ja not_active Expired - Fee Related
- 2002-11-15 BR BR0215943-0A patent/BR0215943A/pt not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
US7577184B2 (en) | 2009-08-18 |
DE60225729D1 (de) | 2008-04-30 |
ATE389975T1 (de) | 2008-04-15 |
CN1695313A (zh) | 2005-11-09 |
WO2004047328A1 (en) | 2004-06-03 |
AU2002352021A1 (en) | 2004-06-15 |
JP2006506865A (ja) | 2006-02-23 |
EP1561288B1 (en) | 2008-03-19 |
US20060133456A1 (en) | 2006-06-22 |
AU2002352021A8 (en) | 2004-06-15 |
CA2509161A1 (en) | 2004-06-03 |
EP1561288A1 (en) | 2005-08-10 |
DE60225729T2 (de) | 2009-04-30 |
CN100395960C (zh) | 2008-06-18 |
JP4237705B2 (ja) | 2009-03-11 |
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Legal Events
Date | Code | Title | Description |
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B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 3O ANUIDADE. |
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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 2038 DE 26/01/2010. |