JPS5621436A - Auxiliary switching system of tdma communication system - Google Patents

Auxiliary switching system of tdma communication system

Info

Publication number
JPS5621436A
JPS5621436A JP9748779A JP9748779A JPS5621436A JP S5621436 A JPS5621436 A JP S5621436A JP 9748779 A JP9748779 A JP 9748779A JP 9748779 A JP9748779 A JP 9748779A JP S5621436 A JPS5621436 A JP S5621436A
Authority
JP
Japan
Prior art keywords
tdma
unit
switch
outputs
auxiliary
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
JP9748779A
Other languages
Japanese (ja)
Inventor
Takeji Kori
Yoshiro Watanabe
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 JP9748779A priority Critical patent/JPS5621436A/en
Publication of JPS5621436A publication Critical patent/JPS5621436A/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
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/204—Multiple access
    • H04B7/212—Time-division multiple access [TDMA]

Abstract

PURPOSE:To make it possible to switch the communication signal from the current TDMA (time division multiple access) unit to the auxiliary TDMA unit without initial action operations of the auxiliary TDMA unit for the fault of the current TDMA unit, by synthesizing burst of current and auxiliary systems by the output of the transmitter. CONSTITUTION:Transmission outputs of TDMA units TDMA1 and TDMA2 are synthesized by hybrid HYB1 and are branched into two by HYB2, and respective branched outputs are amplified by transmission units HPA1 and HPA2 after converted to radio frequencies by transmission output converters U/C1 and U/C2. These outputs are synthesized by hybrid HYB4 and are transmitted to a satellite through branching filter WSF from antenna ANT. The signal from the satellite is converted to an intermediate frequency by receiving frequency converter D/C1 or D/C2 after low-noise amplifier LNR1 or LNR2 is selected by switch SW1, and this frequency is input to the receiving inputs of TDMA1 and TDMA2 through switch SW2 and HYB2.
JP9748779A 1979-07-31 1979-07-31 Auxiliary switching system of tdma communication system Pending JPS5621436A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9748779A JPS5621436A (en) 1979-07-31 1979-07-31 Auxiliary switching system of tdma communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9748779A JPS5621436A (en) 1979-07-31 1979-07-31 Auxiliary switching system of tdma communication system

Publications (1)

Publication Number Publication Date
JPS5621436A true JPS5621436A (en) 1981-02-27

Family

ID=14193625

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9748779A Pending JPS5621436A (en) 1979-07-31 1979-07-31 Auxiliary switching system of tdma communication system

Country Status (1)

Country Link
JP (1) JPS5621436A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053343A (en) * 1983-09-03 1985-03-27 Nec Corp Active and spare switching system of communication equipment applied with time division multiple access system
US5541962A (en) * 1994-03-10 1996-07-30 Fujitsu Limited Transmission timing adjusting device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053343A (en) * 1983-09-03 1985-03-27 Nec Corp Active and spare switching system of communication equipment applied with time division multiple access system
JPH0440901B2 (en) * 1983-09-03 1992-07-06 Nippon Denki Kk
US5541962A (en) * 1994-03-10 1996-07-30 Fujitsu Limited Transmission timing adjusting device

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