JPS57135533A - Diversity receiver - Google Patents

Diversity receiver

Info

Publication number
JPS57135533A
JPS57135533A JP56020619A JP2061981A JPS57135533A JP S57135533 A JPS57135533 A JP S57135533A JP 56020619 A JP56020619 A JP 56020619A JP 2061981 A JP2061981 A JP 2061981A JP S57135533 A JPS57135533 A JP S57135533A
Authority
JP
Japan
Prior art keywords
electric field
reference voltage
voltage
circuit
ratio
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
JP56020619A
Other languages
Japanese (ja)
Other versions
JPS6259939B2 (en
Inventor
Noriyuki Kawamoto
Hideo Ito
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP56020619A priority Critical patent/JPS57135533A/en
Publication of JPS57135533A publication Critical patent/JPS57135533A/en
Publication of JPS6259939B2 publication Critical patent/JPS6259939B2/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
    • H04B7/0802—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)
  • Noise Elimination (AREA)
  • Radio Transmission System (AREA)

Abstract

PURPOSE:To achieve the best diversity reception by varying the reference voltage of a comparing circuit according to an electric field which varies from a low level to a high one. CONSTITUTION:From an IF amplification part 5, a voltage which corresponds to the intensity of an electric field is led to a terminal 16. This voltage is applied to a comparing circuit 12 as the best reference voltage E's, so it is applied to a correcting circuit 17 having prescribed characteristics and its output is used as the reference voltage of a reference voltage source 14'. Therefore, the circuit 12 becomes hard to be operated in a weak electric field and only when an SN ratio is considerably low, antenna switching is performed. Further, since the voltage E's drops in an intense electric field, the circuit operates in response to small distortion and the antenna switching is achieved in an area where the SN ratio is high.
JP56020619A 1981-02-13 1981-02-13 Diversity receiver Granted JPS57135533A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56020619A JPS57135533A (en) 1981-02-13 1981-02-13 Diversity receiver

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56020619A JPS57135533A (en) 1981-02-13 1981-02-13 Diversity receiver

Publications (2)

Publication Number Publication Date
JPS57135533A true JPS57135533A (en) 1982-08-21
JPS6259939B2 JPS6259939B2 (en) 1987-12-14

Family

ID=12032255

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56020619A Granted JPS57135533A (en) 1981-02-13 1981-02-13 Diversity receiver

Country Status (1)

Country Link
JP (1) JPS57135533A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237530A (en) * 1985-04-12 1986-10-22 Rhythm Watch Co Ltd On-vehicle diversity receiver
JPH01292915A (en) * 1988-05-19 1989-11-27 Sanyo Electric Co Ltd Diversity receiver

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61237530A (en) * 1985-04-12 1986-10-22 Rhythm Watch Co Ltd On-vehicle diversity receiver
JPH024177B2 (en) * 1985-04-12 1990-01-26 Rizumu Tokei Kogyo Kk
JPH01292915A (en) * 1988-05-19 1989-11-27 Sanyo Electric Co Ltd Diversity receiver
JP2708777B2 (en) * 1988-05-19 1998-02-04 三洋電機株式会社 Diversity receiver

Also Published As

Publication number Publication date
JPS6259939B2 (en) 1987-12-14

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