JPH04192638A - Voice transmitter for satellite communication - Google Patents

Voice transmitter for satellite communication

Info

Publication number
JPH04192638A
JPH04192638A JP31862590A JP31862590A JPH04192638A JP H04192638 A JPH04192638 A JP H04192638A JP 31862590 A JP31862590 A JP 31862590A JP 31862590 A JP31862590 A JP 31862590A JP H04192638 A JPH04192638 A JP H04192638A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
cipher
signal
voice
circuit
parameter
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
JP31862590A
Inventor
Hiroaki Adachi
Original Assignee
Nec 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

Links

Abstract

PURPOSE: To comparatively simply provide a voice cipher function to a slave station equipment having a DAMA function by allowing a sender side to add a cipher parameter as a cryptographic data to an out-band and to send the resulting signal and allowing a receiver side to decode the cipher parameter and to receive a voice signal.
CONSTITUTION: A sender side of a slave station is provided with a scramble circuit 15 applying scramble processing to a voice signal, a circuit 16A generating a multi-valued data being a cipher parameter of the circuit 15, multiplexer circuits 17, 18 ciphering the cipher parameter to an out-band of the cipher signal, and a transmission section 6 sending the multiplex signal. Moreover, the receiver side is provided with a circuit 21 detecting the cipher parameter at the out-band from the received cipher signal, a decoding circuit 20 decoding a multi-valued data, and a descramble circuit 23 applying descramble processing to the cipher voice signal. Furthermore, the system is provided with a slave station DAMA equipment 8 controlling the cipher parameter. Thus, the voice transmission is attained and a voice cipher function is realized.
COPYRIGHT: (C)1992,JPO&Japio
JP31862590A 1990-11-24 1990-11-24 Voice transmitter for satellite communication Pending JPH04192638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31862590A JPH04192638A (en) 1990-11-24 1990-11-24 Voice transmitter for satellite communication

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31862590A JPH04192638A (en) 1990-11-24 1990-11-24 Voice transmitter for satellite communication

Publications (1)

Publication Number Publication Date
JPH04192638A true true JPH04192638A (en) 1992-07-10

Family

ID=18101226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31862590A Pending JPH04192638A (en) 1990-11-24 1990-11-24 Voice transmitter for satellite communication

Country Status (1)

Country Link
JP (1) JPH04192638A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5862221A (en) * 1994-05-11 1999-01-19 Nec Corporation Scramble wireless communication system
JP2006295338A (en) * 2005-04-06 2006-10-26 Matsushita Electric Ind Co Ltd Data transmission apparatus, data reception apparatus, and data communications apparatus

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458701A (en) * 1987-08-26 1989-03-06 Towa Sekiyu Kk Fuel for heating point
JPH01173929A (en) * 1987-12-28 1989-07-10 Nec Corp Satellite communication system
JPH01180133A (en) * 1988-01-11 1989-07-18 Nec Corp Multiple access control system with request assignment
JPH01278131A (en) * 1988-04-30 1989-11-08 Mitsubishi Electric Corp Demand assign communication device
JPH02230827A (en) * 1989-03-03 1990-09-13 Mitsubishi Electric Corp Dama communication system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6458701A (en) * 1987-08-26 1989-03-06 Towa Sekiyu Kk Fuel for heating point
JPH01173929A (en) * 1987-12-28 1989-07-10 Nec Corp Satellite communication system
JPH01180133A (en) * 1988-01-11 1989-07-18 Nec Corp Multiple access control system with request assignment
JPH01278131A (en) * 1988-04-30 1989-11-08 Mitsubishi Electric Corp Demand assign communication device
JPH02230827A (en) * 1989-03-03 1990-09-13 Mitsubishi Electric Corp Dama communication system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5862221A (en) * 1994-05-11 1999-01-19 Nec Corporation Scramble wireless communication system
JP2006295338A (en) * 2005-04-06 2006-10-26 Matsushita Electric Ind Co Ltd Data transmission apparatus, data reception apparatus, and data communications apparatus

Similar Documents

Publication Publication Date Title
US4920567A (en) Secure telephone terminal
US4606042A (en) Method for digital transmission of messages
JPS60116239A (en) Radio communication equipment
US4167700A (en) Digital voice protection system and method
JPH01279650A (en) System and device for signal scramble transmission
JPS58206257A (en) Loop multiplex transmitting system
JPS60208137A (en) Data processing system
DE3423289A1 (en) Radio network
US4392241A (en) Digital interface system
US4688257A (en) Secure wireless communication system utilizing locally synchronized noise signals
DE3210298A1 (en) Diversity radio network
JPH03201832A (en) Digital mobile communication system
US4790012A (en) Encryption-decryption system
JPH01241959A (en) Communication system between multi-point
DE3134219A1 (en) Method and circuit arrangement for remote control of receiving antennas
JPH0438029A (en) Information service system
JPS63233623A (en) Mobile body communication system and its radio channel switching method
JPH04150652A (en) Conference talking equipment
JPH04151957A (en) Off-talk communication equipment
JPS5895446A (en) Time diversity communication system
JPH04156769A (en) Facsimile mail equipment
JPH04151915A (en) One frequency alternative communication system for mobile communication
JPH03184455A (en) Radio telephone system with privacy telephone function
JPH01191082A (en) Transmitter receiver
JPS62272728A (en) Connecting method between simple computer and radio communication equipment for correspondence recording by simple computer