GB2169477B - Improvements in or relating to communication receivers - Google Patents

Improvements in or relating to communication receivers

Info

Publication number
GB2169477B
GB2169477B GB08529735A GB8529735A GB2169477B GB 2169477 B GB2169477 B GB 2169477B GB 08529735 A GB08529735 A GB 08529735A GB 8529735 A GB8529735 A GB 8529735A GB 2169477 B GB2169477 B GB 2169477B
Authority
GB
United Kingdom
Prior art keywords
relating
communication receivers
receivers
communication
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
Application number
GB08529735A
Other versions
GB8529735D0 (en
GB2169477A (en
Inventor
Christopher John Tarran
Gerald Raymond
Mark Chaplain
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB8529735D0 publication Critical patent/GB8529735D0/en
Publication of GB2169477A publication Critical patent/GB2169477A/en
Application granted granted Critical
Publication of GB2169477B publication Critical patent/GB2169477B/en
Expired 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
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H04B1/715—Interference-related aspects
    • 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
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/20—Countermeasures against jamming
    • H04K3/22—Countermeasures against jamming including jamming detection and monitoring
    • H04K3/224—Countermeasures against jamming including jamming detection and monitoring with countermeasures at transmission and/or reception of the jammed signal, e.g. stopping operation of transmitter or receiver, nulling or enhancing transmitted power in direction of or at frequency of jammer
    • H04K3/228—Elimination in the received signal of jamming or of data corrupted by jamming
    • 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
    • H04B1/715—Interference-related aspects
    • H04B2001/7152—Interference-related aspects with means for suppressing interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/30—Jamming or countermeasure characterized by the infrastructure components
    • H04K2203/32—Jamming or countermeasure characterized by the infrastructure components including a particular configuration of antennas
    • 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
GB08529735A 1984-12-13 1985-12-03 Improvements in or relating to communication receivers Expired GB2169477B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8431515 1984-12-13

Publications (3)

Publication Number Publication Date
GB8529735D0 GB8529735D0 (en) 1986-01-08
GB2169477A GB2169477A (en) 1986-07-09
GB2169477B true GB2169477B (en) 1988-08-17

Family

ID=10571153

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08529735A Expired GB2169477B (en) 1984-12-13 1985-12-03 Improvements in or relating to communication receivers

Country Status (1)

Country Link
GB (1) GB2169477B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5781582A (en) * 1995-05-04 1998-07-14 Interwave Communications International Ltd. Frequency agile transceiver with multiple frequency synthesizers per transceiver
SE512979C2 (en) 1998-10-23 2000-06-12 Ericsson Telefon Ab L M Apparatus and method for attenuation of electromagnetic interference
US7095957B1 (en) 2000-08-17 2006-08-22 At&T Corp. Optical/radio local access network

Also Published As

Publication number Publication date
GB8529735D0 (en) 1986-01-08
GB2169477A (en) 1986-07-09

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19971203