JPS5484413A - Heterodyne repeating system - Google Patents

Heterodyne repeating system

Info

Publication number
JPS5484413A
JPS5484413A JP15262477A JP15262477A JPS5484413A JP S5484413 A JPS5484413 A JP S5484413A JP 15262477 A JP15262477 A JP 15262477A JP 15262477 A JP15262477 A JP 15262477A JP S5484413 A JPS5484413 A JP S5484413A
Authority
JP
Japan
Prior art keywords
power amplifier
converter
distortion
heterodyne
wave
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
JP15262477A
Other languages
Japanese (ja)
Other versions
JPS585616B2 (en
Inventor
Toshio Nojima
Toru Ooyama
Shigeharu Okamoto
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.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP52152624A priority Critical patent/JPS585616B2/en
Publication of JPS5484413A publication Critical patent/JPS5484413A/en
Publication of JPS585616B2 publication Critical patent/JPS585616B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations

Abstract

PURPOSE:To reduce the distortion noise phase for the multiple heterodyne repeating system by using at least one unit of the heterodyne for the upper and lower side band waves contained in the output of the up-converter. CONSTITUTION:The signal sent from transmission input terminal 18 undergoes the frequency conversion into the carrier wave of the upper side band through up- converter 21 by the carrier signal sent from carrier signal source 19 and is then amplified via transmission power amplifier 22 to be transmitted to reception antenna 11 of the repeating installation through transmission antenna 23. Up-converter 15 of the repeating installation undergoes the frequency conversion into the carrier wave band via the lower side band wave. Thus, the 3rd distortion emerging at the output of power amplifier 16 after generated at power amplifier 22 and the 3rd distortion generated at power amplifier 16 feature the phase shifted by pi radian to each other since the pass side wave bands differ at frequency converter 21 and 15 respectively. As a result, the 3rd distortion can be suppressed.
JP52152624A 1977-12-19 1977-12-19 Heterodyne relay method Expired JPS585616B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52152624A JPS585616B2 (en) 1977-12-19 1977-12-19 Heterodyne relay method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52152624A JPS585616B2 (en) 1977-12-19 1977-12-19 Heterodyne relay method

Publications (2)

Publication Number Publication Date
JPS5484413A true JPS5484413A (en) 1979-07-05
JPS585616B2 JPS585616B2 (en) 1983-02-01

Family

ID=15544439

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52152624A Expired JPS585616B2 (en) 1977-12-19 1977-12-19 Heterodyne relay method

Country Status (1)

Country Link
JP (1) JPS585616B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62137927A (en) * 1985-12-11 1987-06-20 Fujitsu Ltd Cross modulation compensating device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5628059A (en) * 1979-08-15 1981-03-19 Hamana Jidosha Kogyo Kk Mounting device for side gate board of truck

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5628059A (en) * 1979-08-15 1981-03-19 Hamana Jidosha Kogyo Kk Mounting device for side gate board of truck

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62137927A (en) * 1985-12-11 1987-06-20 Fujitsu Ltd Cross modulation compensating device
JPH0378010B2 (en) * 1985-12-11 1991-12-12 Fujitsu Ltd

Also Published As

Publication number Publication date
JPS585616B2 (en) 1983-02-01

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