JPS55112051A - Base band signal compounding circuit - Google Patents

Base band signal compounding circuit

Info

Publication number
JPS55112051A
JPS55112051A JP2040379A JP2040379A JPS55112051A JP S55112051 A JPS55112051 A JP S55112051A JP 2040379 A JP2040379 A JP 2040379A JP 2040379 A JP2040379 A JP 2040379A JP S55112051 A JPS55112051 A JP S55112051A
Authority
JP
Japan
Prior art keywords
signal
circuit
composite
control
main circuit
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
JP2040379A
Other languages
Japanese (ja)
Other versions
JPS6138893B2 (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 JP2040379A priority Critical patent/JPS55112051A/en
Publication of JPS55112051A publication Critical patent/JPS55112051A/en
Publication of JPS6138893B2 publication Critical patent/JPS6138893B2/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
    • H04B7/0817—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

Landscapes

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

Abstract

PURPOSE:To eliminate the control signal combined to the main circuit by having the subtraction between the composite signal of the main circuit and the composite control output of the auxiliary circuit via the differential circuit, thus improving the S/N ratio for the base band low band. CONSTITUTION:The diversity reception signal is demodulated at receivers 11 and 21 via antennas 10 and 20, and then changed into the base band signal to be applied to relative square attenuators 12 and 22. Control voltage generators 13 and 23 apply the control signals obtained from the AGC signals and others sent from receivers 11 and 21 to attenuators 12 and 22 via low band pass filters 14 and 24. The composite signal of the main circuit obtained through composition of the output of attenuators 12 and 22 plus the composite control output obtained through composition of the output of compounding auxiliary circuits 15 and 25 are connected to differential circuit 31. Circuit 31 delivers the reception signal with perfect elimination of the control signal contained in the composite signal of the main circuit to terminal 30.
JP2040379A 1979-02-22 1979-02-22 Base band signal compounding circuit Granted JPS55112051A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2040379A JPS55112051A (en) 1979-02-22 1979-02-22 Base band signal compounding circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2040379A JPS55112051A (en) 1979-02-22 1979-02-22 Base band signal compounding circuit

Publications (2)

Publication Number Publication Date
JPS55112051A true JPS55112051A (en) 1980-08-29
JPS6138893B2 JPS6138893B2 (en) 1986-09-01

Family

ID=12026051

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2040379A Granted JPS55112051A (en) 1979-02-22 1979-02-22 Base band signal compounding circuit

Country Status (1)

Country Link
JP (1) JPS55112051A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62159193U (en) * 1986-03-27 1987-10-09
JPS62195388U (en) * 1986-05-29 1987-12-11

Also Published As

Publication number Publication date
JPS6138893B2 (en) 1986-09-01

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