JPS5636242A - Satellite communication system - Google Patents

Satellite communication system

Info

Publication number
JPS5636242A
JPS5636242A JP11134379A JP11134379A JPS5636242A JP S5636242 A JPS5636242 A JP S5636242A JP 11134379 A JP11134379 A JP 11134379A JP 11134379 A JP11134379 A JP 11134379A JP S5636242 A JPS5636242 A JP S5636242A
Authority
JP
Japan
Prior art keywords
signal
pilot signal
pilot
satellite
constitution
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
JP11134379A
Other languages
Japanese (ja)
Other versions
JPS6338895B2 (en
Inventor
Kenichi Tsunoda
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 JP11134379A priority Critical patent/JPS5636242A/en
Publication of JPS5636242A publication Critical patent/JPS5636242A/en
Publication of JPS6338895B2 publication Critical patent/JPS6338895B2/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
    • H04B7/005—Control of transmission; Equalising

Abstract

PURPOSE:To make the sound channel for control signals needless to simplify the constitution of slave stations, by using the pilot signal, which is used in common by slave stations, to transmit control signals. CONSTITUTION:In master earth station (a), the pilot signal modulated in modulator 15 by control signal 16 and the sound channel signal from channel part 10 are synthesized and are transmitted to the satellite from antenna 1. In each slave earth station (b), the receiving signal from the satellite is converted to a receiving intermediate frequency signal and is applied to pilot signal detector 24 and signal distributor 25. AFC signal 31 and AGC signal 32 are obtained by pilot signal detector 24, and the pilot signal is demodulated by demodulator 35, and by the obtained control signal, carrier frequencies of channel part 30 or modulators are selected.
JP11134379A 1979-08-31 1979-08-31 Satellite communication system Granted JPS5636242A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11134379A JPS5636242A (en) 1979-08-31 1979-08-31 Satellite communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11134379A JPS5636242A (en) 1979-08-31 1979-08-31 Satellite communication system

Publications (2)

Publication Number Publication Date
JPS5636242A true JPS5636242A (en) 1981-04-09
JPS6338895B2 JPS6338895B2 (en) 1988-08-02

Family

ID=14558782

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11134379A Granted JPS5636242A (en) 1979-08-31 1979-08-31 Satellite communication system

Country Status (1)

Country Link
JP (1) JPS5636242A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62160303A (en) * 1986-01-06 1987-07-16 財団法人鉄道総合技術研究所 Structure and method for laying paving plate in railroad crossing
JPS633526A (en) * 1986-06-23 1988-01-08 Hitachi Ltd Channel setting system in satellite communication earth station
US6813326B1 (en) 1998-09-11 2004-11-02 Hitachi Denshi Kabushiki Kaisha Data transmission system, data transmission communication station, and data transmission method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62160303A (en) * 1986-01-06 1987-07-16 財団法人鉄道総合技術研究所 Structure and method for laying paving plate in railroad crossing
JPS633526A (en) * 1986-06-23 1988-01-08 Hitachi Ltd Channel setting system in satellite communication earth station
US6813326B1 (en) 1998-09-11 2004-11-02 Hitachi Denshi Kabushiki Kaisha Data transmission system, data transmission communication station, and data transmission method

Also Published As

Publication number Publication date
JPS6338895B2 (en) 1988-08-02

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