CA2122865A1 - Transmitter Location System - Google Patents

Transmitter Location System

Info

Publication number
CA2122865A1
CA2122865A1 CA2122865A CA2122865A CA2122865A1 CA 2122865 A1 CA2122865 A1 CA 2122865A1 CA 2122865 A CA2122865 A CA 2122865A CA 2122865 A CA2122865 A CA 2122865A CA 2122865 A1 CA2122865 A1 CA 2122865A1
Authority
CA
Canada
Prior art keywords
antenna
carrier frequency
transmitter
frequency signal
modulated carrier
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
CA2122865A
Other languages
French (fr)
Other versions
CA2122865C (en
Inventor
Gerard Terreault
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.)
BIOMA RECHERCHES Inc
Centre de Recherche Industrielle du Quebec CRIQ
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
Priority to CA002122865A priority Critical patent/CA2122865C/en
Priority to AU22516/95A priority patent/AU2251695A/en
Priority to PCT/CA1995/000224 priority patent/WO1995030970A1/en
Application granted granted Critical
Publication of CA2122865C publication Critical patent/CA2122865C/en
Publication of CA2122865A1 publication Critical patent/CA2122865A1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
    • G08B25/009—Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
    • G07C9/00—Individual registration on entry or exit
    • G07C9/20—Individual registration on entry or exit involving the use of a pass
    • G07C9/28—Individual registration on entry or exit involving the use of a pass the pass enabling tracking or indicating presence

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

A transmitter location system, and more specifically, a person location system capable of providing a communication link available for data or speech transmission toward a central station is disclosed. The system comprises at least one modulation signal generating unit coupled to a transmitter for producing a first modulated carrier frequency signal. The system is further comprised of a plurality of receiving antennas and corresponding antenna modulators distributed in a plurality of bounded spaces. At least one of the receiving antennas receives the first modulated carrier frequency signal and produces a corresponding received carrier frequency signal. The antenna modulators further have respective antenna identification code generators for producing a second modulation signal comprising a code identifying a corresponding receiving antenna. At least one of the antenna modulator produces a respective composite modulated carrier frequency signal carrying the first and second modulation signals and corresponding to the activating transmitter. The transmitter modulator and the antenna modulators are adapted to apply mutually orthogonal modulations. At least one receiver at a central station receives and demodulates the composite modulated carrier frequency signal, whereby the activating transmitter can be located within the plurality of bounded spaces.
CA002122865A 1994-05-04 1994-05-04 Transmitter location system Expired - Fee Related CA2122865C (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002122865A CA2122865C (en) 1994-05-04 1994-05-04 Transmitter location system
AU22516/95A AU2251695A (en) 1994-05-04 1995-04-20 Transmitter locating system
PCT/CA1995/000224 WO1995030970A1 (en) 1994-05-04 1995-04-20 Transmitter locating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA002122865A CA2122865C (en) 1994-05-04 1994-05-04 Transmitter location system

Publications (2)

Publication Number Publication Date
CA2122865C CA2122865C (en) 1995-11-05
CA2122865A1 true CA2122865A1 (en) 1995-11-05

Family

ID=4153533

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002122865A Expired - Fee Related CA2122865C (en) 1994-05-04 1994-05-04 Transmitter location system

Country Status (1)

Country Link
CA (1) CA2122865C (en)

Also Published As

Publication number Publication date
CA2122865C (en) 1995-11-05

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed