JPS55147042A - Radio relay system - Google Patents

Radio relay system

Info

Publication number
JPS55147042A
JPS55147042A JP5406479A JP5406479A JPS55147042A JP S55147042 A JPS55147042 A JP S55147042A JP 5406479 A JP5406479 A JP 5406479A JP 5406479 A JP5406479 A JP 5406479A JP S55147042 A JPS55147042 A JP S55147042A
Authority
JP
Japan
Prior art keywords
call
antenna
transmitted
station
master
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
JP5406479A
Other languages
Japanese (ja)
Other versions
JPS5830774B2 (en
Inventor
Tetsuo Hanazawa
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP54054064A priority Critical patent/JPS5830774B2/en
Publication of JPS55147042A publication Critical patent/JPS55147042A/en
Publication of JPS5830774B2 publication Critical patent/JPS5830774B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15528—Control of operation parameters of a relay station to exploit the physical medium
    • H04B7/15535—Control of relay amplifier gain

Landscapes

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

Abstract

PURPOSE:To reduce the amount of intermodulation distortion, by interpreting the control channel signal CH received and transmitted between the master and slave stations by the relay station, and identifying the call CH required for the relay objective area and relaying the CH only through selection and amplification. CONSTITUTION:The electromagnetic waves from the master station are received at the antenna 1, distributed in m at the distributor 4 and amplified at the selection amplifiers 5-1-5-m, synthesized 7 via the high frequency switches 6-1-6-m, and transmitted to the slave station from the antenna 10. The electromagnetic waves from the slave station are received at the antenna 10, distributed by m, amplified at the selection amplifiers 13-1-13-m, synthesized 15, and transmitted to the master station from the antenna 1. The control unit 17 monitors the demodulated output b-1 of the amplifier 5-1 of the control CH transmitted from the master station at all times, detects the change-over instruction signal from the control CH to the call CH, interpretes the signal giving and receiving between the master and slave stations before the start of call, and detects the call CH frequency used. Thus, the control unit 17 selects the required call CH only and inputs it to the selecting amplifier, controlling the high frequency switch and performing the relay.
JP54054064A 1979-05-04 1979-05-04 Wireless relay method Expired JPS5830774B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54054064A JPS5830774B2 (en) 1979-05-04 1979-05-04 Wireless relay method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54054064A JPS5830774B2 (en) 1979-05-04 1979-05-04 Wireless relay method

Publications (2)

Publication Number Publication Date
JPS55147042A true JPS55147042A (en) 1980-11-15
JPS5830774B2 JPS5830774B2 (en) 1983-07-01

Family

ID=12960179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54054064A Expired JPS5830774B2 (en) 1979-05-04 1979-05-04 Wireless relay method

Country Status (1)

Country Link
JP (1) JPS5830774B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176934A (en) * 1983-03-28 1984-10-06 Nippon Telegr & Teleph Corp <Ntt> Booster radio relay system
WO2000060767A1 (en) * 1999-03-31 2000-10-12 Matsushita Electric Industrial Co., Ltd. Repeater
JP2007124401A (en) * 2005-10-28 2007-05-17 Japan Radio Co Ltd Repeater and receiver
JP2007124147A (en) * 2005-10-26 2007-05-17 Japan Radio Co Ltd Repeater
JPWO2006043592A1 (en) * 2004-10-20 2008-05-22 松下電器産業株式会社 booster
JP2011527538A (en) * 2008-07-10 2011-10-27 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Self-optimizing repeater
US9496945B2 (en) 2007-12-14 2016-11-15 Telefonaktiebolaget Lm Ericsson (Publ) Radio repeater controllability

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176934A (en) * 1983-03-28 1984-10-06 Nippon Telegr & Teleph Corp <Ntt> Booster radio relay system
JPS6342449B2 (en) * 1983-03-28 1988-08-23 Nippon Telegraph & Telephone
WO2000060767A1 (en) * 1999-03-31 2000-10-12 Matsushita Electric Industrial Co., Ltd. Repeater
US6804491B1 (en) 1999-03-31 2004-10-12 Matsushita Electric Industrial Co., Ltd. Mobile communication system and repeater used in the mobile communication system
JPWO2006043592A1 (en) * 2004-10-20 2008-05-22 松下電器産業株式会社 booster
JP2007124147A (en) * 2005-10-26 2007-05-17 Japan Radio Co Ltd Repeater
JP4603462B2 (en) * 2005-10-26 2010-12-22 日本無線株式会社 Relay device
JP2007124401A (en) * 2005-10-28 2007-05-17 Japan Radio Co Ltd Repeater and receiver
JP4603464B2 (en) * 2005-10-28 2010-12-22 日本無線株式会社 Relay device and receiving device
US9496945B2 (en) 2007-12-14 2016-11-15 Telefonaktiebolaget Lm Ericsson (Publ) Radio repeater controllability
JP2011527538A (en) * 2008-07-10 2011-10-27 テレフオンアクチーボラゲット エル エム エリクソン（パブル） Self-optimizing repeater
US9660720B2 (en) 2008-07-10 2017-05-23 Telefonaktiebolaget Lm Ericsson (Publ) Self-optimizing repeater

Also Published As

Publication number Publication date
JPS5830774B2 (en) 1983-07-01

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