JPS5625841A - Direct relay unit - Google Patents

Direct relay unit

Info

Publication number
JPS5625841A
JPS5625841A JP10194179A JP10194179A JPS5625841A JP S5625841 A JPS5625841 A JP S5625841A JP 10194179 A JP10194179 A JP 10194179A JP 10194179 A JP10194179 A JP 10194179A JP S5625841 A JPS5625841 A JP S5625841A
Authority
JP
Japan
Prior art keywords
pass filter
band pass
amplifier
transmission
output
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
JP10194179A
Other languages
Japanese (ja)
Other versions
JPS6312412B2 (en
Inventor
Osamu Yamamoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP10194179A priority Critical patent/JPS5625841A/en
Publication of JPS5625841A publication Critical patent/JPS5625841A/en
Publication of JPS6312412B2 publication Critical patent/JPS6312412B2/ja
Granted 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
    • H04B7/15542—Selecting at relay station its transmit and receive resources

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To achieve the simplification and high reliability, by the amplification for the reception and transmission signals with one set of amplifier. CONSTITUTION:The reception input signal from the reception input terminal 1 passes through the band pass filter 11 and amplified at the amplifier 12, and passes through the band pass filter 13 and fed to the amplitude limiter 14 to suppress the variation in the reception input for a constant level. The output of the amplitude limiter 14 is in frequency conversion with the mixer 15 and the shift frequency oscillator 16 to be the transmission frequency. The transmission signal produced from the mixer 15 is removed of the unnecessary waves through the band pass filter 17 and amplified at the amplifier 12 again and output from the transmission output terminal 2 through the band pass filter 18.
JP10194179A 1979-08-10 1979-08-10 Direct relay unit Granted JPS5625841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10194179A JPS5625841A (en) 1979-08-10 1979-08-10 Direct relay unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10194179A JPS5625841A (en) 1979-08-10 1979-08-10 Direct relay unit

Publications (2)

Publication Number Publication Date
JPS5625841A true JPS5625841A (en) 1981-03-12
JPS6312412B2 JPS6312412B2 (en) 1988-03-18

Family

ID=14313918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10194179A Granted JPS5625841A (en) 1979-08-10 1979-08-10 Direct relay unit

Country Status (1)

Country Link
JP (1) JPS5625841A (en)

Also Published As

Publication number Publication date
JPS6312412B2 (en) 1988-03-18

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