CA2219215C - Systeme d'appel de personnes a deux vitesses utilisant deux canaux f.m. et des sous-porteuses - Google Patents

Systeme d'appel de personnes a deux vitesses utilisant deux canaux f.m. et des sous-porteuses Download PDF

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Publication number
CA2219215C
CA2219215C CA002219215A CA2219215A CA2219215C CA 2219215 C CA2219215 C CA 2219215C CA 002219215 A CA002219215 A CA 002219215A CA 2219215 A CA2219215 A CA 2219215A CA 2219215 C CA2219215 C CA 2219215C
Authority
CA
Canada
Prior art keywords
messages
data rate
transmission
subcarrier
transmission data
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 - Fee Related
Application number
CA002219215A
Other languages
English (en)
Other versions
CA2219215A1 (fr
Inventor
Kenneth G. Gray
Daniel J. Park
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.)
Seiko Instruments Inc
Original Assignee
Seiko Instruments Inc
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 Seiko Instruments Inc filed Critical Seiko Instruments Inc
Publication of CA2219215A1 publication Critical patent/CA2219215A1/fr
Application granted granted Critical
Publication of CA2219215C publication Critical patent/CA2219215C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/022—Selective call receivers
    • H04W88/025—Selective call decoders
    • H04W88/026—Selective call decoders using digital address codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La portée de transmission effective d'un système d'appel de personnes sans fils peut être modifiée par modification du débit de transmission. Le signal (31) est transmis à un débit plus élevé aux récepteurs (26) à une courte portée (18) du transmetteur (28). Le signal (30) est transmis à un débit plus bas permettant à un récepteur (26) de recevoir d'une manière correcte des messages à une plus grande distance de transmission (32) depuis le transmetteur (28), avec une couverture de transmission clairsemée. Les deux débits de transmission sont assurés soit par des sous-porteuses séparées sur le même canal F.M., soit par la même sous-porteuse de canaux F.M. différents, soit encore par des sous-porteuses différentes de canaux F.M. différents. Dans une région à couverture de transmission dense, le récepteur décode les messages de transmission à débit de transmission plus élevé. Dans les régions à couverture de transmission clairsemée, le récepteur décode les messages à débit de transmission plus bas.
CA002219215A 1995-06-07 1996-06-04 Systeme d'appel de personnes a deux vitesses utilisant deux canaux f.m. et des sous-porteuses Expired - Fee Related CA2219215C (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US47715095A 1995-06-07 1995-06-07
US08/477,150 1995-06-07
PCT/US1996/008951 WO1996041489A1 (fr) 1995-06-07 1996-06-04 Systeme d'appel de personnes a deux vitesses utilisant deux canaux f.m. et des sous-porteuses

Publications (2)

Publication Number Publication Date
CA2219215A1 CA2219215A1 (fr) 1996-12-19
CA2219215C true CA2219215C (fr) 2007-09-25

Family

ID=23894730

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002219215A Expired - Fee Related CA2219215C (fr) 1995-06-07 1996-06-04 Systeme d'appel de personnes a deux vitesses utilisant deux canaux f.m. et des sous-porteuses

Country Status (5)

Country Link
EP (1) EP0832538A4 (fr)
JP (1) JP3805369B2 (fr)
AU (1) AU5986096A (fr)
CA (1) CA2219215C (fr)
WO (1) WO1996041489A1 (fr)

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4646290A (en) * 1984-08-03 1987-02-24 National Information Utilities Corp. Data transmission method and apparatus
US4713808A (en) * 1985-11-27 1987-12-15 A T & E Corporation Watch pager system and communication protocol
JPH06101699B2 (ja) * 1986-10-21 1994-12-12 モトローラ・インコーポレーテッド 受信機のビットレートを変更するための装置を備えた無線通信受信機
US4918437A (en) * 1988-10-13 1990-04-17 Motorola, Inc. High data rate simulcast communication system
US5170487A (en) * 1989-01-19 1992-12-08 Seiko Corp. Paging system with multiple frequencies and multiple protocols
US5146612A (en) * 1989-04-17 1992-09-08 Spingarn James L Technique for using a subcarrier frequency of a radio station to transmit, receive and display a message together with audio reproduction of the radio program
US5142692A (en) * 1989-06-16 1992-08-25 Seiko Corp. Transmitting information with cut and flip spectrum
US5262769A (en) * 1990-04-23 1993-11-16 Reach Electronics, Inc. Programmed scanning pager receiver

Also Published As

Publication number Publication date
AU5986096A (en) 1996-12-30
CA2219215A1 (fr) 1996-12-19
JPH11507187A (ja) 1999-06-22
JP3805369B2 (ja) 2006-08-02
EP0832538A1 (fr) 1998-04-01
WO1996041489A1 (fr) 1996-12-19
EP0832538A4 (fr) 2000-05-10

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Effective date: 20100604