GB2521092B - Radio systems - Google Patents

Radio systems

Info

Publication number
GB2521092B
GB2521092B GB8615564.5A GB8615564A GB2521092B GB 2521092 B GB2521092 B GB 2521092B GB 8615564 A GB8615564 A GB 8615564A GB 2521092 B GB2521092 B GB 2521092B
Authority
GB
United Kingdom
Prior art keywords
radio systems
radio
systems
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.)
Expired - Lifetime
Application number
GB8615564.5A
Other versions
GB2521092A (en
GB8615564D0 (en
Inventor
Simon A B Avarne
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.)
Racal Research Ltd
Racal Ses Ltd
Original Assignee
Racal Research Ltd
Racal Ses Ltd
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 Racal Research Ltd, Racal Ses Ltd filed Critical Racal Research Ltd
Priority to GB8615564.5A priority Critical patent/GB2521092B/en
Anticipated expiration legal-status Critical
Publication of GB8615564D0 publication Critical patent/GB8615564D0/en
Publication of GB2521092A publication Critical patent/GB2521092A/en
Application granted granted Critical
Publication of GB2521092B publication Critical patent/GB2521092B/en
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K1/00—Secret communication
    • H04K1/003—Secret communication by varying carrier frequency at or within predetermined or random intervals
    • 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
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/20—Countermeasures against jamming
    • H04K3/25—Countermeasures against jamming based on characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/827—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection using characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
GB8615564.5A 1986-06-25 1986-06-25 Radio systems Expired - Lifetime GB2521092B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8615564.5A GB2521092B (en) 1986-06-25 1986-06-25 Radio systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8615564.5A GB2521092B (en) 1986-06-25 1986-06-25 Radio systems

Publications (3)

Publication Number Publication Date
GB8615564D0 GB8615564D0 (en) 2011-03-30
GB2521092A GB2521092A (en) 2015-06-17
GB2521092B true GB2521092B (en) 2016-03-30

Family

ID=43859220

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8615564.5A Expired - Lifetime GB2521092B (en) 1986-06-25 1986-06-25 Radio systems

Country Status (1)

Country Link
GB (1) GB2521092B (en)

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
GB2521092A (en) 2015-06-17
GB8615564D0 (en) 2011-03-30

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Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20060624