JPS5636250A - Intermediate frequency synthesizing circuit of space diversity - Google Patents

Intermediate frequency synthesizing circuit of space diversity

Info

Publication number
JPS5636250A
JPS5636250A JP11134179A JP11134179A JPS5636250A JP S5636250 A JPS5636250 A JP S5636250A JP 11134179 A JP11134179 A JP 11134179A JP 11134179 A JP11134179 A JP 11134179A JP S5636250 A JPS5636250 A JP S5636250A
Authority
JP
Japan
Prior art keywords
phase
level adjusting
phase detector
automatic
distortion
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
JP11134179A
Other languages
Japanese (ja)
Inventor
Hiroshi Seguchi
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 JP11134179A priority Critical patent/JPS5636250A/en
Publication of JPS5636250A publication Critical patent/JPS5636250A/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
    • H04B7/0837—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
    • H04B7/084—Equal gain combining, only phase adjustments

Landscapes

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

Abstract

PURPOSE:To make it possible to obtain an APC (automatic phase control) loop which is not affected by propagation distortion, by providing a spectrums having circuit having the sine wave roll-off characteristic and a phase detector which outputs a phase difference at every pulse period. CONSTITUTION:Input signal 101 is applied to synthesizer 4 and automatic level adjusting equipment 3 by hybrid 2, and input signal 102 passes through phase shifter 1 and is applied to synthesizer 4 and automatic level adjusting equipment 3' through hybrid 2'. One-level signals from automatic level adjusting equipments 3 and 3' are applied to phase detector 7 after subjected to band limiting required for reducing the influence of amplitude distortion and delay distortion, which signals received in propagating equioments, and for improving thermal noise by spectrum shaving circuits 6 and 6'. The output of phase detector 7 is sampled by clocks from clock reproducing equipment 8 and is applied to phase shifter 1, thereby constituting an APC loop.
JP11134179A 1979-08-31 1979-08-31 Intermediate frequency synthesizing circuit of space diversity Pending JPS5636250A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11134179A JPS5636250A (en) 1979-08-31 1979-08-31 Intermediate frequency synthesizing circuit of space diversity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11134179A JPS5636250A (en) 1979-08-31 1979-08-31 Intermediate frequency synthesizing circuit of space diversity

Publications (1)

Publication Number Publication Date
JPS5636250A true JPS5636250A (en) 1981-04-09

Family

ID=14558729

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11134179A Pending JPS5636250A (en) 1979-08-31 1979-08-31 Intermediate frequency synthesizing circuit of space diversity

Country Status (1)

Country Link
JP (1) JPS5636250A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61169517A (en) * 1985-01-21 1986-07-31 Kaiyo Toshi Kaihatsu Kk Positioner for marine structure of seabed

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61169517A (en) * 1985-01-21 1986-07-31 Kaiyo Toshi Kaihatsu Kk Positioner for marine structure of seabed
JPH0349322B2 (en) * 1985-01-21 1991-07-29 Ocean City Dev Co Ltd

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