JPS5486220A - Signal composite superdiversity repeating system through phase control - Google Patents

Signal composite superdiversity repeating system through phase control

Info

Publication number
JPS5486220A
JPS5486220A JP15300777A JP15300777A JPS5486220A JP S5486220 A JPS5486220 A JP S5486220A JP 15300777 A JP15300777 A JP 15300777A JP 15300777 A JP15300777 A JP 15300777A JP S5486220 A JPS5486220 A JP S5486220A
Authority
JP
Japan
Prior art keywords
frequency
phase
shift
low
oscillator
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
JP15300777A
Other languages
Japanese (ja)
Other versions
JPS6041901B2 (en
Inventor
Kyo Kinoshita
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 JP15300777A priority Critical patent/JPS6041901B2/en
Publication of JPS5486220A publication Critical patent/JPS5486220A/en
Publication of JPS6041901B2 publication Critical patent/JPS6041901B2/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

Landscapes

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

Abstract

PURPOSE:To obtain a repeating system which demands no deliberation about a circuit insersion loss and distortional noise by applying a phase modulator or phase shifter, interposed between a shift oscillator and shift converter, only to a single shift frequency regardless of a reception frequency band. CONSTITUTION:Two received waves of the same frequency from antennas 1 and 8, branched and filtered, are amplified to a fixed level before being converted into a transmitting frequency by shift converters 6 and 13. One output of shift oscillator 15 is supplied to shift converter 6 via phase shifter 16, and the other to shift converter 13 after phase modulation 18 by the signal of low-frequency oscillator 19. Outputs having been converted into transmitting waves are filtered, mixed by synthesizer 21 and branched partially by branch circuit 22, and detection circuit 23 detects a low-frequency signal which varies in size corresponding to the phase of the composite input signal. Then, synchronous detector 20 detects the polarity in phase of the low-frequency signal together with the output of low-frequency oscillator 19 to drive phase shifter 16 via control circuit 17, so that the input wave of synthesizer 21 will be in phase.
JP15300777A 1977-12-21 1977-12-21 Signal synthesis space diversity relay method using phase control Expired JPS6041901B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15300777A JPS6041901B2 (en) 1977-12-21 1977-12-21 Signal synthesis space diversity relay method using phase control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15300777A JPS6041901B2 (en) 1977-12-21 1977-12-21 Signal synthesis space diversity relay method using phase control

Publications (2)

Publication Number Publication Date
JPS5486220A true JPS5486220A (en) 1979-07-09
JPS6041901B2 JPS6041901B2 (en) 1985-09-19

Family

ID=15552905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15300777A Expired JPS6041901B2 (en) 1977-12-21 1977-12-21 Signal synthesis space diversity relay method using phase control

Country Status (1)

Country Link
JP (1) JPS6041901B2 (en)

Also Published As

Publication number Publication date
JPS6041901B2 (en) 1985-09-19

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