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CA2250074A1 - Apparatus for code tracking in a direct sequence spread spectrum receiver - Google Patents

Apparatus for code tracking in a direct sequence spread spectrum receiver

Info

Publication number
CA2250074A1
CA2250074A1 CA002250074A CA2250074A CA2250074A1 CA 2250074 A1 CA2250074 A1 CA 2250074A1 CA 002250074 A CA002250074 A CA 002250074A CA 2250074 A CA2250074 A CA 2250074A CA 2250074 A1 CA2250074 A1 CA 2250074A1
Authority
CA
Canada
Prior art keywords
signals
correlator
generate
spread spectrum
correlators
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.)
Granted
Application number
CA002250074A
Other languages
French (fr)
Other versions
CA2250074C (en
Inventor
Anthony Peter Hulbert
David Peter Chandler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roke Manor Research Ltd
Original Assignee
Individual
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
Priority to GB9502992A priority Critical patent/GB2298110B/en
Priority to CN96180312.6A priority patent/CN1220061A/en
Priority to CA002250074A priority patent/CA2250074C/en
Priority to BR9612584-5A priority patent/BR9612584A/en
Priority to PCT/GB1996/000747 priority patent/WO1997036381A1/en
Application filed by Individual filed Critical Individual
Priority to DE19681752T priority patent/DE19681752T1/en
Priority claimed from PCT/GB1996/000747 external-priority patent/WO1997036381A1/en
Publication of CA2250074A1 publication Critical patent/CA2250074A1/en
Application granted granted Critical
Publication of CA2250074C publication Critical patent/CA2250074C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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

Inphase and quadrature signals are applied to first, second and third correlators, the first correlator being arranged to generate prompt signals, the second correlator being arranged to generate late signals and the third correlator being arranged to generate early signals. The output from the first correlator is passed to estimation means and signals generated from the estimation means are multiplied with the outputs from the first and second correlators in respect of each channel. The inphase and quadrature channel signals generated from the second and third correlators are added together and the sum of signals are then subtracted to generate a signal for controlling a loop filter and clock generation means controls the analogue to digital converters.
CA002250074A 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver Expired - Fee Related CA2250074C (en)

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
CA002250074A CA2250074C (en) 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver
BR9612584-5A BR9612584A (en) 1995-02-16 1996-03-28 Apparatus for tracking code in a direct sequence diffuse spectrum receiver
PCT/GB1996/000747 WO1997036381A1 (en) 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver
CN96180312.6A CN1220061A (en) 1995-02-16 1996-03-28 Apparatus for code tracking in direct sequence spread spectrum receiver
DE19681752T DE19681752T1 (en) 1995-02-16 1996-03-28 Device for code tracking in a direct sequence spread spectrum receiver

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
CA002250074A CA2250074C (en) 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver
BR9612584-5A BR9612584A (en) 1995-02-16 1996-03-28 Apparatus for tracking code in a direct sequence diffuse spectrum receiver
PCT/GB1996/000747 WO1997036381A1 (en) 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver
CN96180312.6A CN1220061A (en) 1995-02-16 1996-03-28 Apparatus for code tracking in direct sequence spread spectrum receiver

Publications (2)

Publication Number Publication Date
CA2250074A1 true CA2250074A1 (en) 1997-10-02
CA2250074C CA2250074C (en) 2003-02-18

Family

ID=27425263

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002250074A Expired - Fee Related CA2250074C (en) 1995-02-16 1996-03-28 Apparatus for code tracking in a direct sequence spread spectrum receiver

Country Status (4)

Country Link
CN (1) CN1220061A (en)
BR (1) BR9612584A (en)
CA (1) CA2250074C (en)
GB (1) GB2298110B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
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 (en) * 1998-08-27 2002-04-04 Infineon Technologies Ag Tracking procedure and arrangement for carrying out the procedure
GB2345421B (en) * 1998-12-23 2004-05-26 Symbionics Limted A direct-sequence spread-sprectrum receiver
DE10251322B4 (en) * 2002-11-04 2006-10-26 Advanced Micro Devices, Inc., Sunnyvale Early-late correlation to timing error correction in data communication receivers

Also Published As

Publication number Publication date
CA2250074C (en) 2003-02-18
GB9502992D0 (en) 1995-04-05
GB2298110B (en) 1999-06-23
GB2298110A (en) 1996-08-21
CN1220061A (en) 1999-06-16
BR9612584A (en) 1999-12-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20050329