JPS568932A - Space diversity system - Google Patents

Space diversity system

Info

Publication number
JPS568932A
JPS568932A JP8532779A JP8532779A JPS568932A JP S568932 A JPS568932 A JP S568932A JP 8532779 A JP8532779 A JP 8532779A JP 8532779 A JP8532779 A JP 8532779A JP S568932 A JPS568932 A JP S568932A
Authority
JP
Japan
Prior art keywords
receiver
antennas
ant1
frequency
space diversity
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.)
Pending
Application number
JP8532779A
Other languages
Japanese (ja)
Inventor
Toshinori Yokoe
Sadao Aya
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 JP8532779A priority Critical patent/JPS568932A/en
Publication of JPS568932A publication Critical patent/JPS568932A/en
Pending 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
    • H04B7/0802—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 antenna selection
    • H04B7/0805—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 antenna selection with single receiver and antenna switching
    • H04B7/0814—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 antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold

Landscapes

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

Abstract

PURPOSE:To realize a space diversity system economically by selecting one of antennas in accordance with reception states and then by connecting it to one receiver. CONSTITUTION:A signal of frequency f1 is received by receiver RX1, and that of frequency f2 by receiver RX2. Antennas ANT1 and ANT2 can be between RX1 and RX2 by switching. If the received signal level of RX1 or RX2 decreases below a fixed value with ANT1 connected to RX1 and RX2, control circuit CONT detects the signal level to control change-over circuit RFSW1 and ANT1 is changed over to ANT2 through circulator CR5. Because of the system that changes the antennas over in accordance with the level of the received signal, only one receiver is needed for every in-use frequency.
JP8532779A 1979-07-05 1979-07-05 Space diversity system Pending JPS568932A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8532779A JPS568932A (en) 1979-07-05 1979-07-05 Space diversity system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8532779A JPS568932A (en) 1979-07-05 1979-07-05 Space diversity system

Publications (1)

Publication Number Publication Date
JPS568932A true JPS568932A (en) 1981-01-29

Family

ID=13855528

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8532779A Pending JPS568932A (en) 1979-07-05 1979-07-05 Space diversity system

Country Status (1)

Country Link
JP (1) JPS568932A (en)

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