CA2219215A1 - Dual channel dual speed fm subcarrier paging system - Google Patents

Dual channel dual speed fm subcarrier paging system

Info

Publication number
CA2219215A1
CA2219215A1 CA002219215A CA2219215A CA2219215A1 CA 2219215 A1 CA2219215 A1 CA 2219215A1 CA 002219215 A CA002219215 A CA 002219215A CA 2219215 A CA2219215 A CA 2219215A CA 2219215 A1 CA2219215 A1 CA 2219215A1
Authority
CA
Canada
Prior art keywords
transmission
data rate
dual
transmitter
transmitted
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
CA002219215A
Other languages
French (fr)
Other versions
CA2219215C (en
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
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
Publication of CA2219215A1 publication Critical patent/CA2219215A1/en
Application granted granted Critical
Publication of CA2219215C publication Critical patent/CA2219215C/en
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

The effective transmission range of a wireless paging system is varied by changing the transmission data rate. Signal (31) is transmitted at a fast data rate to receivers (26) in a small transmission range (18) from transmitter (28). Signal (30) is transmitted at a slower data rate so that a receiver (26) can reliably receive messages over a larger transmission range (32) from the transmitter (28) for sparse transmitter coverage. The dual transmission data rates are transmitted either on separate subcarriers on the same FM channel, on the same subcarrier of different FM channels or alternatively on different subcarriers of different FM channels. In a region with dense transmission coverage, the receiver decodes transmission messages at the faster transmission data rate. In regions with sparse transmission coverage, the receiver decodes messages at the slower data rate.
CA002219215A 1995-06-07 1996-06-04 Dual channel dual speed fm subcarrier paging system Expired - Fee Related CA2219215C (en)

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 (en) 1995-06-07 1996-06-04 Dual channel dual speed fm subcarrier paging system

Publications (2)

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

Family

ID=23894730

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002219215A Expired - Fee Related CA2219215C (en) 1995-06-07 1996-06-04 Dual channel dual speed fm subcarrier paging system

Country Status (5)

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

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
EP0327533B1 (en) * 1986-10-21 1993-07-07 Motorola, Inc. Radio communication receiver with apparatus for altering bit rate of the receiver
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
CA2219215C (en) 2007-09-25
EP0832538A4 (en) 2000-05-10
JPH11507187A (en) 1999-06-22
WO1996041489A1 (en) 1996-12-19
AU5986096A (en) 1996-12-30
EP0832538A1 (en) 1998-04-01
JP3805369B2 (en) 2006-08-02

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20100604