BR9612584A - Aparelho para rastear codigo em um receptor de espectro difuso de sequencia direta - Google Patents
Aparelho para rastear codigo em um receptor de espectro difuso de sequencia diretaInfo
- Publication number
- BR9612584A BR9612584A BR9612584-5A BR9612584A BR9612584A BR 9612584 A BR9612584 A BR 9612584A BR 9612584 A BR9612584 A BR 9612584A BR 9612584 A BR9612584 A BR 9612584A
- Authority
- BR
- Brazil
- Prior art keywords
- signals
- correlator
- generate
- correlators
- willing
- 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
- H04B1/7073—Synchronisation aspects
- H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Patente de Invenção: <B>"APARELHO PARA RASTREAR CóDIGO EM UM RECEPTOR DE ESPECTRO DIFUSO DE SEQuêNCIA DIRETA"<D>. Sinais em fase e quadratura são aplicados ao primeiro, segundo e terceiro correlacionadores, o primeiro correlacionador sendo disposto para gerar sinais imediatos, o segundo correlacionador sendo disposto para gerar sinais posteriores e o terceiro correlacionador sendo disposto para gerar sinais antecipados. A saída do primeiro correlacionador passa para os dispositivos de estimativa; os sinais gerados a partir dos dispositivos de estimativa são multiplicados com as saídas do primeiro e segundo correlacionadores em relação a cada canal. Os sinais de canal de entrada de fase e de quadratura gerados do segundo e terceiro correlacionadores são somados e a soma dos sinais é, então subtraída para gerar um sinal para controlar um filtro de circuito, e um dispositivo gerador de relógio controla os conversores de análogo para digital.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9502992A GB2298110B (en) | 1995-02-16 | 1995-02-16 | Apparatus for providing code tracking in a direct sequence spread spectrum receiver |
CN96180312.6A CN1220061A (zh) | 1995-02-16 | 1996-03-28 | 直接序列扩频接收机中用于码元跟踪的设备 |
PCT/GB1996/000747 WO1997036381A1 (en) | 1995-02-16 | 1996-03-28 | Apparatus for code tracking in a direct sequence spread spectrum receiver |
CA002250074A CA2250074C (en) | 1995-02-16 | 1996-03-28 | Apparatus for code tracking in a direct sequence spread spectrum receiver |
BR9612584-5A BR9612584A (pt) | 1995-02-16 | 1996-03-28 | Aparelho para rastear codigo em um receptor de espectro difuso de sequencia direta |
DE19681752T DE19681752T1 (de) | 1995-02-16 | 1996-03-28 | Vorrichtung zur Codeverfolgung in einem Direktfolgen-Spreizspektrum-Empfänger |
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9502992A GB2298110B (en) | 1995-02-16 | 1995-02-16 | Apparatus for providing code tracking in a direct sequence spread spectrum receiver |
CN96180312.6A CN1220061A (zh) | 1995-02-16 | 1996-03-28 | 直接序列扩频接收机中用于码元跟踪的设备 |
PCT/GB1996/000747 WO1997036381A1 (en) | 1995-02-16 | 1996-03-28 | Apparatus for code tracking in a direct sequence spread spectrum receiver |
CA002250074A CA2250074C (en) | 1995-02-16 | 1996-03-28 | Apparatus for code tracking in a direct sequence spread spectrum receiver |
BR9612584-5A BR9612584A (pt) | 1995-02-16 | 1996-03-28 | Aparelho para rastear codigo em um receptor de espectro difuso de sequencia direta |
Publications (1)
Publication Number | Publication Date |
---|---|
BR9612584A true BR9612584A (pt) | 1999-12-28 |
Family
ID=27425263
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BR9612584-5A BR9612584A (pt) | 1995-02-16 | 1996-03-28 | Aparelho para rastear codigo em um receptor de espectro difuso de sequencia direta |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN1220061A (pt) |
BR (1) | BR9612584A (pt) |
CA (1) | CA2250074C (pt) |
GB (1) | GB2298110B (pt) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6590872B1 (en) * | 1997-12-12 | 2003-07-08 | Thomson Licensing S.A. | Receiver with parallel correlator for acquisition of spread spectrum digital transmission |
DE19839018C2 (de) * | 1998-08-27 | 2002-04-04 | Infineon Technologies Ag | Tracking-Verfahren und Anordnung zur Durchführung des Verfahrens |
GB2345421B (en) * | 1998-12-23 | 2004-05-26 | Symbionics Limted | A direct-sequence spread-sprectrum receiver |
DE10251322B4 (de) | 2002-11-04 | 2006-10-26 | Advanced Micro Devices, Inc., Sunnyvale | Early-Late-Korrelation zur Timingfehlerkorrektur in Datenkommunikationsempfängern |
-
1995
- 1995-02-16 GB GB9502992A patent/GB2298110B/en not_active Expired - Fee Related
-
1996
- 1996-03-28 CA CA002250074A patent/CA2250074C/en not_active Expired - Fee Related
- 1996-03-28 BR BR9612584-5A patent/BR9612584A/pt unknown
- 1996-03-28 CN CN96180312.6A patent/CN1220061A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
GB2298110B (en) | 1999-06-23 |
GB2298110A (en) | 1996-08-21 |
CA2250074C (en) | 2003-02-18 |
CA2250074A1 (en) | 1997-10-02 |
CN1220061A (zh) | 1999-06-16 |
GB9502992D0 (en) | 1995-04-05 |
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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] |