JPS5466709A - Space diversity system in direct repeater unit - Google Patents

Space diversity system in direct repeater unit

Info

Publication number
JPS5466709A
JPS5466709A JP13370077A JP13370077A JPS5466709A JP S5466709 A JPS5466709 A JP S5466709A JP 13370077 A JP13370077 A JP 13370077A JP 13370077 A JP13370077 A JP 13370077A JP S5466709 A JPS5466709 A JP S5466709A
Authority
JP
Japan
Prior art keywords
reception
frequency
shift
phase
signal
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
JP13370077A
Other languages
Japanese (ja)
Other versions
JPS5733731B2 (en
Inventor
Takuro Oguchi
Hajime Masuda
Masaji Honma
Toshio Kikuchi
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP13370077A priority Critical patent/JPS5466709A/en
Publication of JPS5466709A publication Critical patent/JPS5466709A/en
Publication of JPS5733731B2 publication Critical patent/JPS5733731B2/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
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To obtain the delivery signal by synthesizing the phase at the micorwave band with a simple constitution, through the control of the oscillation frequency of the shift oscillator at one side with the phase difference of two input reception wave. CONSTITUTION:The first and second output can be obtained by performing frequency shift of the reception waves incoming to the reception antennas 11 and 21. Further, the frequency of the shift oscillators 15 and 25 to shift the first and second reception frequency is controlled with the signal obtained from the phase comparison 16 for these outputs. Thus, the reception frequency signal of the first and second respectively shifted is phase-synthesized in the micro-wave band with a simple constitution, allowing to obtain the transmission signal.
JP13370077A 1977-11-08 1977-11-08 Space diversity system in direct repeater unit Granted JPS5466709A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13370077A JPS5466709A (en) 1977-11-08 1977-11-08 Space diversity system in direct repeater unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13370077A JPS5466709A (en) 1977-11-08 1977-11-08 Space diversity system in direct repeater unit

Publications (2)

Publication Number Publication Date
JPS5466709A true JPS5466709A (en) 1979-05-29
JPS5733731B2 JPS5733731B2 (en) 1982-07-19

Family

ID=15110834

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13370077A Granted JPS5466709A (en) 1977-11-08 1977-11-08 Space diversity system in direct repeater unit

Country Status (1)

Country Link
JP (1) JPS5466709A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4311709Y1 (en) * 1965-07-19 1968-05-21
JPS5238692A (en) * 1975-09-22 1977-03-25 Yokote Tekkosho:Kk Taper boring machine

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4311709Y1 (en) * 1965-07-19 1968-05-21
JPS5238692A (en) * 1975-09-22 1977-03-25 Yokote Tekkosho:Kk Taper boring machine

Also Published As

Publication number Publication date
JPS5733731B2 (en) 1982-07-19

Similar Documents

Publication Publication Date Title
JPS5466709A (en) Space diversity system in direct repeater unit
JPS5731235A (en) Receiving system
JPS5466702A (en) Control unit for transmission frequency
JPS57159140A (en) Frequency shift type in repeater
JPS55166348A (en) Multi-channel radio transmitter/receiver
GB912607A (en) Improvements in frequency stabilised radio oscillation generators
JPS5698036A (en) Double polarized wave radio communication system
JPS54120568A (en) Phase-locked loop circuit
JPS5745703A (en) Output frequency stabilizing circuit for microwave oscillator
JPS5530647A (en) Directive compression receiver
JPS56158568A (en) Radio communication system
JPS57111150A (en) Radio communication system
JPS5460820A (en) Phase shifter for diversity system
JPS5459812A (en) Receiver
JPS5459811A (en) Receiver
JPS54101215A (en) Heterodyne relay unit of hot standby type
JPS5484413A (en) Heterodyne repeating system
JPS5672548A (en) Space diversity receiving system
JPS57193139A (en) Harmonic transmitting and receiving system with high sensitivity
JPS5795729A (en) Radio transmitter and receiver
JPS545311A (en) Synchronous system for single side-band communication
JPS54141511A (en) Space diversity system
Darby et al. Frequency hop synthesisers based on chirp mixing
JPS54101211A (en) Direct shift repeater of multi-frequency
JPS54101210A (en) Direct shift repeater having two transmission paths