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JPS5779739A - Space diversity reception system - Google Patents

Space diversity reception system

Info

Publication number
JPS5779739A
JPS5779739A JP55155359A JP15535980A JPS5779739A JP S5779739 A JPS5779739 A JP S5779739A JP 55155359 A JP55155359 A JP 55155359A JP 15535980 A JP15535980 A JP 15535980A JP S5779739 A JPS5779739 A JP S5779739A
Authority
JP
Japan
Prior art keywords
reception
antenna
reception level
switching
section
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
JP55155359A
Other languages
Japanese (ja)
Inventor
Takahiro Yokota
Bunichi Miyamoto
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 JP55155359A priority Critical patent/JPS5779739A/en
Publication of JPS5779739A publication Critical patent/JPS5779739A/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
    • H04B7/0817—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 multiple receivers and antenna path selection
    • H04B7/082—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 multiple receivers and antenna path selection selecting best antenna path
    • 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
    • H04B7/0831—Compensation of the diversity switching process for non-uniform properties or faulty operations of the switches used in the diversity switching process

Landscapes

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

Abstract

PURPOSE:To prevent the production of switching noise, by making inoperative the switching function of system when a reception level is a prescribed value or more, in a space diversity reception system. CONSTITUTION:A signal received at antennas 1, 2 is applied to a switching section 5, and only the system with high reception level is applied to a reception section consisting of a high frequency amplifier 6, a frequency converter 7 and an intermediate frequency amplifier 10 selectively. If the system of the antenna 1 is selected, when the reception level is a prescribed value or more produced at a reference voltage generating section 17, a logical circuit 18 is controlled, and evel if the reception level received at an antenna 2 is higher than the reception level of the antenna 1 under present reception, the switching section 5 is made inoperative to keep the reception state from the antenna 1. Thus, no switching noise is produced from the switching section 5.
JP55155359A 1980-11-05 1980-11-05 Space diversity reception system Pending JPS5779739A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55155359A JPS5779739A (en) 1980-11-05 1980-11-05 Space diversity reception system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55155359A JPS5779739A (en) 1980-11-05 1980-11-05 Space diversity reception system

Publications (1)

Publication Number Publication Date
JPS5779739A true JPS5779739A (en) 1982-05-19

Family

ID=15604176

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55155359A Pending JPS5779739A (en) 1980-11-05 1980-11-05 Space diversity reception system

Country Status (1)

Country Link
JP (1) JPS5779739A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1985003608A1 (en) * 1984-02-13 1985-08-15 Commtech International Switched diversity method and apparatus for fm receivers
JPS60165879A (en) * 1984-02-08 1985-08-29 Sony Corp Switching device of television antenna
JPH01189248A (en) * 1987-11-30 1989-07-28 Motorola Inc Antenna selection control circuit
US6058297A (en) * 1995-03-15 2000-05-02 Ab Volvo Radio receiver for vehicle use
US11471632B2 (en) 2018-10-16 2022-10-18 Yamamoto Kogaku Co., Ltd. Mask fitting level determination device
US11686640B2 (en) 2017-08-31 2023-06-27 Yamamoto Kogaku Co., Ltd. Mask adhesion determination device

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60165879A (en) * 1984-02-08 1985-08-29 Sony Corp Switching device of television antenna
JPH055231B2 (en) * 1984-02-08 1993-01-21 Sony Corp
WO1985003608A1 (en) * 1984-02-13 1985-08-15 Commtech International Switched diversity method and apparatus for fm receivers
JPH01189248A (en) * 1987-11-30 1989-07-28 Motorola Inc Antenna selection control circuit
JP2719575B2 (en) * 1987-11-30 1998-02-25 モトローラ・インコーポレーテッド Antenna selection control circuit
US6058297A (en) * 1995-03-15 2000-05-02 Ab Volvo Radio receiver for vehicle use
US11686640B2 (en) 2017-08-31 2023-06-27 Yamamoto Kogaku Co., Ltd. Mask adhesion determination device
US11471632B2 (en) 2018-10-16 2022-10-18 Yamamoto Kogaku Co., Ltd. Mask fitting level determination device

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