JPS57202142A - Relay device for communication satellite - Google Patents

Relay device for communication satellite

Info

Publication number
JPS57202142A
JPS57202142A JP8770981A JP8770981A JPS57202142A JP S57202142 A JPS57202142 A JP S57202142A JP 8770981 A JP8770981 A JP 8770981A JP 8770981 A JP8770981 A JP 8770981A JP S57202142 A JPS57202142 A JP S57202142A
Authority
JP
Japan
Prior art keywords
signal
transmitted
base station
station
satellite
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
JP8770981A
Other languages
Japanese (ja)
Inventor
Tadao Shimamura
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 JP8770981A priority Critical patent/JPS57202142A/en
Publication of JPS57202142A publication Critical patent/JPS57202142A/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
    • H04B7/2046—SS-TDMA, TDMA satellite switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Relay Systems (AREA)

Abstract

PURPOSE:To perform the commnication between mobile stations through the connection of one hop satellite line, by providing a means for separating a signal transmitted from a mobile station on a satellite and an antenna directivity switching means for transmitting the result of separation to an area where an opposite mobile station exists. CONSTITUTION:One of signals branched with branch amplifiers 31'33 in a satellite station 1 is transmitted to a base station 2 via a signal synthesizer 27. The other branched signal is inputted to an IF switch matrix 34 consisting of filter groups and switch matrixes, and the said matrix 34 separates each input signal into a frequency band corresponding to each audio channel and inputs it to any of signal synthesizers 35-37 through the instruction from the base station 2. The said signal synthesizers 35-37 synthesize the reception signal from the base station 2 with the input signal from the said IF switch matrix 34 and transmit the result to transmitters 15-17 for corresponding mobile stations 3-5. Thus, spot beams 8-10 are transmitted to each mobile station.
JP8770981A 1981-06-08 1981-06-08 Relay device for communication satellite Pending JPS57202142A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8770981A JPS57202142A (en) 1981-06-08 1981-06-08 Relay device for communication satellite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8770981A JPS57202142A (en) 1981-06-08 1981-06-08 Relay device for communication satellite

Publications (1)

Publication Number Publication Date
JPS57202142A true JPS57202142A (en) 1982-12-10

Family

ID=13922433

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8770981A Pending JPS57202142A (en) 1981-06-08 1981-06-08 Relay device for communication satellite

Country Status (1)

Country Link
JP (1) JPS57202142A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175419A (en) * 1987-12-29 1989-07-11 Nec Corp Satellite/moving body communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01175419A (en) * 1987-12-29 1989-07-11 Nec Corp Satellite/moving body communication system

Similar Documents

Publication Publication Date Title
KR960016647B1 (en) Base station for a frequency hopping tdma radio communication system
JPS56126339A (en) Mobile communication system
ES8503181A1 (en) Cellular mobile radio service telephone system.
JPS6451730A (en) Booster and method of repeating
EP0338471A3 (en) A dividing cascade network for a support station in a radio telephone network
JPS6471329A (en) Mobile body satellite communication system
WO1996020538A3 (en) Reliable, power-efficient, and cost-effective satellite communication system
JPS644133A (en) Trunk radio repeating system
KR940002815B1 (en) High capacity sectorized cellular communication system
CA2089289A1 (en) Uplink null intrusion rejection for satellite communications systems
MY119263A (en) Improvements in or relating to antennas
ATE2369T1 (en) WIRELESS.
JPS57202142A (en) Relay device for communication satellite
JPS57106245A (en) Radio communication system
MY112693A (en) Radio station having a remote antenna unit
GB1525330A (en) Transmit-receive switching signal generator for radio telephone equipment
JPS57106246A (en) Radio communication system
CA2246954A1 (en) Signal distributing/synthesizing apparatus
JPS62207034A (en) Radio repeater
JPS6471222A (en) Transmission/reception filter band split system for antenna multicoupler
JPS5793740A (en) Mobile communication system
JPS5698036A (en) Double polarized wave radio communication system
JPS57170637A (en) Simple on-line communication system
JPS55132137A (en) Multiplex radio repeater
REILLY et al. Satellite personal communications system[Patent]