JPS56132828A - Space diversity receiving device - Google Patents

Space diversity receiving device

Info

Publication number
JPS56132828A
JPS56132828A JP3629980A JP3629980A JPS56132828A JP S56132828 A JPS56132828 A JP S56132828A JP 3629980 A JP3629980 A JP 3629980A JP 3629980 A JP3629980 A JP 3629980A JP S56132828 A JPS56132828 A JP S56132828A
Authority
JP
Japan
Prior art keywords
level
frequency
detector
output
phase
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
JP3629980A
Other languages
Japanese (ja)
Inventor
Kojiro Tajima
Shozo Komaki
Shigeharu Okamoto
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 JP3629980A priority Critical patent/JPS56132828A/en
Publication of JPS56132828A publication Critical patent/JPS56132828A/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
    • H04B7/0837—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 prevent an omission of a picture frame synchronizing signal, by detecting a resultant power level of the space diversity receiving device through the narrow band filter of specific frequency. CONSTITUTION:Signals which have been received by the main and subsidiary antennas of 1 and 2 are synthesized by the power compounding device 5 through the phase shifter 3 and the phase modulator 4, respectively, also the composite signal is converted to an intermediate frequency signal by the receiving local oscillator 7 and the frequency mixer 6, is amplified by the preamplifier 8, and is provided to the main intermediate amplifier 9 having an AGC function. After that, the output of the preamplifier 8 is partially provided to the level detector 15 through the narrow band filter 14, and its output is inputted to the phase detector 12. The level of said level detector 15 is a level of passing frequency of the filter 14, and by handling this detector output in the same way as regular AGC voltage, in-phase synthesis is executed by said frequency.
JP3629980A 1980-03-24 1980-03-24 Space diversity receiving device Pending JPS56132828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3629980A JPS56132828A (en) 1980-03-24 1980-03-24 Space diversity receiving device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3629980A JPS56132828A (en) 1980-03-24 1980-03-24 Space diversity receiving device

Publications (1)

Publication Number Publication Date
JPS56132828A true JPS56132828A (en) 1981-10-17

Family

ID=12465929

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3629980A Pending JPS56132828A (en) 1980-03-24 1980-03-24 Space diversity receiving device

Country Status (1)

Country Link
JP (1) JPS56132828A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61150421A (en) * 1984-12-24 1986-07-09 Fujitsu Ltd Space diversity control system
US7592898B1 (en) 1999-03-09 2009-09-22 Keystone Technology Solutions, Llc Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US7898390B2 (en) 1999-03-09 2011-03-01 Round Rock Research, Llc Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
USRE42751E1 (en) 1998-09-03 2011-09-27 Round Rock Research, Llc Communication system, interrogators and communication methods
US8351968B2 (en) * 1999-03-09 2013-01-08 Round Rock Research, Llc Wireless communication systems, interrogators and methods of communication within a wireless communication system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61150421A (en) * 1984-12-24 1986-07-09 Fujitsu Ltd Space diversity control system
USRE42751E1 (en) 1998-09-03 2011-09-27 Round Rock Research, Llc Communication system, interrogators and communication methods
US7592898B1 (en) 1999-03-09 2009-09-22 Keystone Technology Solutions, Llc Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US7898390B2 (en) 1999-03-09 2011-03-01 Round Rock Research, Llc Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
US7969284B2 (en) 1999-03-09 2011-06-28 Round Rock Research, Llc Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US7982586B2 (en) 1999-03-09 2011-07-19 Round Rock Research, Llc Wireless communication systems, interrogators and methods of communicating within a wireless communication system
US8174361B2 (en) 1999-03-09 2012-05-08 Round Rock Research, Llc Phase shifters, interrogators, methods of shifting a phase angle of a signal, and methods of operating an interrogator
US8351968B2 (en) * 1999-03-09 2013-01-08 Round Rock Research, Llc Wireless communication systems, interrogators and methods of communication within a wireless communication system

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