JPS5527752A - Signal compounding system - Google Patents

Signal compounding system

Info

Publication number
JPS5527752A
JPS5527752A JP10087078A JP10087078A JPS5527752A JP S5527752 A JPS5527752 A JP S5527752A JP 10087078 A JP10087078 A JP 10087078A JP 10087078 A JP10087078 A JP 10087078A JP S5527752 A JPS5527752 A JP S5527752A
Authority
JP
Japan
Prior art keywords
circuit
output
amplifier
gain
amplifiers
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
JP10087078A
Other languages
Japanese (ja)
Other versions
JPS616579B2 (en
Inventor
Nobuo Katayama
Saburou Koshizaka
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 JP10087078A priority Critical patent/JPS5527752A/en
Publication of JPS5527752A publication Critical patent/JPS5527752A/en
Publication of JPS616579B2 publication Critical patent/JPS616579B2/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
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]

Landscapes

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

Abstract

PURPOSE:To ensure the stabilized compound ratio control without applying the load to the gain attenuation property of the controlled amplifier and thus to secure the suitable application to the diversity reception by giving isolation between the function to obtain the optimum compound ratio and the function to make the level constant for the compound output. CONSTITUTION:Output signals 1a and 2a given from independent receivers are applied to variable gain amplifiers 11 and 12, and these output are added together at adder 5 to be drawn out from output terminal 3 via automatic gain control circuit 15. At the same time, a serial circuit consisting of amplifier 13, inversional circuit 6 and amplifier 14 is installed between amplifiers 11 and 12. On the other hand, control voltage 1b and 2b sent from independent receivers are applied to subtractor circuit 4 for subtraction, and this output is connected to the joint of amplifier 13 and circuit 6 forming a serial circuit. As a result, the linear relation is available for the gain to the gain control voltage of amplifiers 11 and 12, thus obtaining the optimum compound ratio over a wide range with no special property required.
JP10087078A 1978-08-21 1978-08-21 Signal compounding system Granted JPS5527752A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10087078A JPS5527752A (en) 1978-08-21 1978-08-21 Signal compounding system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10087078A JPS5527752A (en) 1978-08-21 1978-08-21 Signal compounding system

Publications (2)

Publication Number Publication Date
JPS5527752A true JPS5527752A (en) 1980-02-28
JPS616579B2 JPS616579B2 (en) 1986-02-27

Family

ID=14285342

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10087078A Granted JPS5527752A (en) 1978-08-21 1978-08-21 Signal compounding system

Country Status (1)

Country Link
JP (1) JPS5527752A (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

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
JPS616579B2 (en) 1986-02-27

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