GB2357677A - Spread spectrum communication system - Google Patents

Spread spectrum communication system

Info

Publication number
GB2357677A
GB2357677A GB0030963A GB0030963A GB2357677A GB 2357677 A GB2357677 A GB 2357677A GB 0030963 A GB0030963 A GB 0030963A GB 0030963 A GB0030963 A GB 0030963A GB 2357677 A GB2357677 A GB 2357677A
Authority
GB
United Kingdom
Prior art keywords
communication system
spread spectrum
spectrum communication
combined
code
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
GB0030963A
Other versions
GB2357677B (en
GB0030963D0 (en
Inventor
Sudathshu Ubayasiri
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.)
Individual
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
Application filed by Individual filed Critical Individual
Publication of GB0030963D0 publication Critical patent/GB0030963D0/en
Publication of GB2357677A publication Critical patent/GB2357677A/en
Application granted granted Critical
Publication of GB2357677B publication Critical patent/GB2357677B/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
    • H04B1/709—Correlator structure
    • H04B1/7095—Sliding correlator 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
    • H04B1/70718—Spread spectrum techniques using direct sequence modulation with asynchronous demodulation, i.e. not requiring code synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

A communications link comprises a transmitter which transmits information that has been combined with a pseudonoise code. A receiver recovers the information by correlating (36) the combined signal with the same pseudonoise code (34) but generated at a different frequency. The differing code rates cause one signal to slide across the other in time to effect correlation peaks by which the data is represented.
GB0030963A 1998-07-07 1999-07-07 Spread spectrum communication system Expired - Fee Related GB2357677B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9814757.2A GB9814757D0 (en) 1998-07-07 1998-07-07 Data link
PCT/GB1999/002173 WO2000002327A1 (en) 1998-07-07 1999-07-07 Spread spectrum communication system

Publications (3)

Publication Number Publication Date
GB0030963D0 GB0030963D0 (en) 2001-01-31
GB2357677A true GB2357677A (en) 2001-06-27
GB2357677B GB2357677B (en) 2003-09-24

Family

ID=10835122

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9814757.2A Ceased GB9814757D0 (en) 1998-07-07 1998-07-07 Data link
GB0030963A Expired - Fee Related GB2357677B (en) 1998-07-07 1999-07-07 Spread spectrum communication system

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9814757.2A Ceased GB9814757D0 (en) 1998-07-07 1998-07-07 Data link

Country Status (3)

Country Link
AU (1) AU4918499A (en)
GB (2) GB9814757D0 (en)
WO (1) WO2000002327A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0435593A2 (en) * 1989-12-29 1991-07-03 Xerox Corporation Transmitted code clock code-matching synchronization for spread-spectrum communication systems
US5048052A (en) * 1989-02-07 1991-09-10 Clarion Co., Ltd. Spread spectrum communication device
EP0713305A1 (en) * 1994-11-16 1996-05-22 Nec Corporation Data rate detector for terminal station

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5048052A (en) * 1989-02-07 1991-09-10 Clarion Co., Ltd. Spread spectrum communication device
EP0435593A2 (en) * 1989-12-29 1991-07-03 Xerox Corporation Transmitted code clock code-matching synchronization for spread-spectrum communication systems
EP0713305A1 (en) * 1994-11-16 1996-05-22 Nec Corporation Data rate detector for terminal station

Also Published As

Publication number Publication date
GB2357677B (en) 2003-09-24
GB9814757D0 (en) 1998-09-02
GB0030963D0 (en) 2001-01-31
AU4918499A (en) 2000-01-24
WO2000002327A1 (en) 2000-01-13

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20150707