JPH07118680B2 - 地下施設用双方向通信装置 - Google Patents

地下施設用双方向通信装置

Info

Publication number
JPH07118680B2
JPH07118680B2 JP62315437A JP31543787A JPH07118680B2 JP H07118680 B2 JPH07118680 B2 JP H07118680B2 JP 62315437 A JP62315437 A JP 62315437A JP 31543787 A JP31543787 A JP 31543787A JP H07118680 B2 JPH07118680 B2 JP H07118680B2
Authority
JP
Japan
Prior art keywords
communication device
way communication
antenna
signal
analog
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 - Lifetime
Application number
JP62315437A
Other languages
English (en)
Japanese (ja)
Other versions
JPS63194425A (ja
Inventor
ベルグ アンティ
Original Assignee
オウトクンプ オイ
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 オウトクンプ オイ filed Critical オウトクンプ オイ
Publication of JPS63194425A publication Critical patent/JPS63194425A/ja
Publication of JPH07118680B2 publication Critical patent/JPH07118680B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transceivers (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Radio Transmission System (AREA)
  • Transmitters (AREA)
JP62315437A 1987-01-22 1987-12-15 地下施設用双方向通信装置 Expired - Lifetime JPH07118680B2 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI870286 1987-01-22
FI870286A FI77131C (fi) 1987-01-22 1987-01-22 Anordning foer aostadkommande av dubbelriktad kommunikation i underjordiska utrymmen.

Publications (2)

Publication Number Publication Date
JPS63194425A JPS63194425A (ja) 1988-08-11
JPH07118680B2 true JPH07118680B2 (ja) 1995-12-18

Family

ID=8523819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62315437A Expired - Lifetime JPH07118680B2 (ja) 1987-01-22 1987-12-15 地下施設用双方向通信装置

Country Status (5)

Country Link
JP (1) JPH07118680B2 (de)
DE (1) DE3741866C2 (de)
FI (1) FI77131C (de)
FR (1) FR2610156B1 (de)
GB (1) GB2200270B (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3942320A1 (de) * 1989-10-10 1991-04-11 Wk Elektronik Gmbh Anordnung zur kommunikation in einem bergwerk, insbesondere in einem salzbergwerk

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3825829A (en) * 1973-01-29 1974-07-23 Motorola Inc Radio system employing simultaneously triggered pulse repeaters
JPS599041B2 (ja) * 1976-10-05 1984-02-29 三菱電機株式会社 薄膜ミラ−
JPS54123819A (en) * 1978-03-17 1979-09-26 Kiyoshi Takizawa Under soil or water signal transmitter
JPS5726942A (en) * 1980-07-25 1982-02-13 Tokyo Gas Co Ltd Data transmission system
GB2083977B (en) * 1980-08-26 1984-08-22 Standard Telephones Cables Ltd Single channel duplex radio system
GB2109197B (en) * 1981-10-13 1985-12-04 Standard Telephones Cables Ltd Radio system
US4777652A (en) * 1982-07-27 1988-10-11 A.R.F. Products Radio communication systems for underground mines
FR2538645B1 (fr) * 1982-12-28 1986-04-11 Thomson Csf Procede et dispositif d'interpolation de la parole dans un systeme de transmission de parole numerisee

Also Published As

Publication number Publication date
JPS63194425A (ja) 1988-08-11
DE3741866A1 (de) 1988-08-04
FI77131C (fi) 1989-01-10
FI77131B (fi) 1988-09-30
GB2200270B (en) 1991-06-26
FR2610156A1 (fr) 1988-07-29
FI870286A0 (fi) 1987-01-22
GB8729449D0 (en) 1988-02-03
FR2610156B1 (fr) 1994-06-10
FI870286A (fi) 1988-07-23
GB2200270A (en) 1988-07-27
DE3741866C2 (de) 1997-04-03

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