JPS56157139A - Base band signal synthesizing system for diversity reception - Google Patents

Base band signal synthesizing system for diversity reception

Info

Publication number
JPS56157139A
JPS56157139A JP6073380A JP6073380A JPS56157139A JP S56157139 A JPS56157139 A JP S56157139A JP 6073380 A JP6073380 A JP 6073380A JP 6073380 A JP6073380 A JP 6073380A JP S56157139 A JPS56157139 A JP S56157139A
Authority
JP
Japan
Prior art keywords
control voltage
comparator
band signal
base band
reception 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
JP6073380A
Other languages
Japanese (ja)
Other versions
JPS616580B2 (en
Inventor
Atsushi Muromoto
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP6073380A priority Critical patent/JPS56157139A/en
Publication of JPS56157139A publication Critical patent/JPS56157139A/en
Publication of JPS616580B2 publication Critical patent/JPS616580B2/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
    • H04B7/0842—Weighted combining
    • H04B7/0865—Independent weighting, i.e. weights based on own antenna reception parameters

Landscapes

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

Abstract

PURPOSE:To obtain a reception signal of a high quality, by controlling a specific square attenuator in accordance with the S/N of the reception signal. CONSTITUTION:The control voltage generators 13a and 13b generate the control voltage according to the S/N of a reception signal. A maximum control voltage generator 15-1 extracts the larger control voltage and supplies it to a reference voltage comparator 15-2. The output voltage of the comparator 15-2 is identical with a difference between the maximum control voltage and the reference voltage. The output of the comparator 15-2 is applied to an input of each of the differential amplifiers 15-3a and 15-3b that amplify each diversity route, and the output voltages of the generators 13a and 13b are applied to the other input respectively. Then a specific square attenuators 12a and 12b are controlled by the difference of both voltages.
JP6073380A 1980-05-09 1980-05-09 Base band signal synthesizing system for diversity reception Granted JPS56157139A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6073380A JPS56157139A (en) 1980-05-09 1980-05-09 Base band signal synthesizing system for diversity reception

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6073380A JPS56157139A (en) 1980-05-09 1980-05-09 Base band signal synthesizing system for diversity reception

Publications (2)

Publication Number Publication Date
JPS56157139A true JPS56157139A (en) 1981-12-04
JPS616580B2 JPS616580B2 (en) 1986-02-27

Family

ID=13150762

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6073380A Granted JPS56157139A (en) 1980-05-09 1980-05-09 Base band signal synthesizing system for diversity reception

Country Status (1)

Country Link
JP (1) JPS56157139A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513222A (en) * 1993-12-28 1996-04-30 Nec Corporation Combining circuit for a diversity receiving system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62138780U (en) * 1986-02-20 1987-09-01
JPS6378933A (en) * 1986-09-22 1988-04-09 安田　宏明 Deodorizing apparatus of flash toilet bowl
JPH01198933A (en) * 1987-07-15 1989-08-10 Yoshioka Komuten:Kk Eliminator for malodor in toilet stool
JPH02164948A (en) * 1988-12-16 1990-06-25 Rinfuoosu Kogyo Kk Deodorizing device for simplified water closet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5513222A (en) * 1993-12-28 1996-04-30 Nec Corporation Combining circuit for a diversity receiving system

Also Published As

Publication number Publication date
JPS616580B2 (en) 1986-02-27

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