GB2329290A - Method of transmitting and receiving data,system and receiver therefor - Google Patents

Method of transmitting and receiving data,system and receiver therefor

Info

Publication number
GB2329290A
GB2329290A GB9825283A GB9825283A GB2329290A GB 2329290 A GB2329290 A GB 2329290A GB 9825283 A GB9825283 A GB 9825283A GB 9825283 A GB9825283 A GB 9825283A GB 2329290 A GB2329290 A GB 2329290A
Authority
GB
United Kingdom
Prior art keywords
receiver
data signal
frequencies
transmitting
transceiver unit
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
GB9825283A
Other versions
GB2329290B (en
GB9825283D0 (en
Inventor
Clive Russell Irving
David John Spreadbury
Colin Richard Smithers
Timothy Charles Mace
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.)
TRACKER NETWORK
Original Assignee
TRACKER NETWORK
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 claimed from GBGB9611425.1A external-priority patent/GB9611425D0/en
Application filed by TRACKER NETWORK filed Critical TRACKER NETWORK
Priority to GB9825283A priority Critical patent/GB2329290B/en
Publication of GB9825283D0 publication Critical patent/GB9825283D0/en
Publication of GB2329290A publication Critical patent/GB2329290A/en
Application granted granted Critical
Publication of GB2329290B publication Critical patent/GB2329290B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/04—Details
    • G01S1/045—Receivers
    • 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
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/26—Circuits for superheterodyne receivers
    • 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
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3827—Portable transceivers

Abstract

A data signal is transmitted by a transceiver unit at an unknown frequency within a known range of frequencies. The data signal is received at a receiver (1) within the known range of frequencies. At the receiver (1), the range of frequencies is divided into plural frequency bands each of width less than the uncertainty in the transmission frequency of the data signal. The presence of the data signal in at least one of the frequency bands is detected and the detected data signals are demodulated. A very low cost transmitter can thereby be used in the transceiver unit, allowing two-way communication between the receiver (1) and the transceiver unit.
GB9825283A 1996-05-31 1997-05-28 Method of transmitting and receiving data,system and receiver therefor Expired - Lifetime GB2329290B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9825283A GB2329290B (en) 1996-05-31 1997-05-28 Method of transmitting and receiving data,system and receiver therefor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9611425.1A GB9611425D0 (en) 1996-05-31 1996-05-31 Digital communications
PCT/GB1997/001444 WO1997045962A1 (en) 1996-05-31 1997-05-28 Method of transmitting and receiving data, system and receiver therefor
GB9825283A GB2329290B (en) 1996-05-31 1997-05-28 Method of transmitting and receiving data,system and receiver therefor

Publications (3)

Publication Number Publication Date
GB9825283D0 GB9825283D0 (en) 1999-01-13
GB2329290A true GB2329290A (en) 1999-03-17
GB2329290B GB2329290B (en) 2001-04-18

Family

ID=26309422

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9825283A Expired - Lifetime GB2329290B (en) 1996-05-31 1997-05-28 Method of transmitting and receiving data,system and receiver therefor

Country Status (1)

Country Link
GB (1) GB2329290B (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245555A1 (en) * 1986-03-31 1987-11-19 Lo-Jack Corporation Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like
WO1992010043A1 (en) * 1990-11-30 1992-06-11 Thomson-Csf Method for resetting the local oscillators of a receiver and device for implementing such method
EP0550146A1 (en) * 1991-12-31 1993-07-07 AT&T Corp. Digital block processor for processing a plurality of transmission channels in a wireless radiotelephony system
EP0573320A1 (en) * 1992-05-26 1993-12-08 Thomson-Csf System for automatic identification and detection of vehicles and objects
EP0583522A2 (en) * 1992-08-20 1994-02-23 Nexus Telecommunication Systems Ltd. Remote position determination system
DE4425713C1 (en) * 1994-07-20 1995-04-20 Inst Rundfunktechnik Gmbh Method for multi-carrier modulation and demodulation of digitally coded data

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2260049B (en) * 1990-08-08 1994-06-08 Thorn Emi Electronics Ltd Improvements in or relating to receivers
GB2282501B (en) * 1993-09-29 1997-10-01 Roke Manor Research Improvements in or relating to signal detectors

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0245555A1 (en) * 1986-03-31 1987-11-19 Lo-Jack Corporation Method of and system and apparatus for locating and/or tracking stolen or missing vehicles and the like
WO1992010043A1 (en) * 1990-11-30 1992-06-11 Thomson-Csf Method for resetting the local oscillators of a receiver and device for implementing such method
EP0550146A1 (en) * 1991-12-31 1993-07-07 AT&T Corp. Digital block processor for processing a plurality of transmission channels in a wireless radiotelephony system
EP0573320A1 (en) * 1992-05-26 1993-12-08 Thomson-Csf System for automatic identification and detection of vehicles and objects
EP0583522A2 (en) * 1992-08-20 1994-02-23 Nexus Telecommunication Systems Ltd. Remote position determination system
DE4425713C1 (en) * 1994-07-20 1995-04-20 Inst Rundfunktechnik Gmbh Method for multi-carrier modulation and demodulation of digitally coded data

Also Published As

Publication number Publication date
GB2329290B (en) 2001-04-18
GB9825283D0 (en) 1999-01-13

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