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1. WO1981002081 - MULTIPLE CARRIER MICROWAVE RELAY LINK

Publication Number WO/1981/002081
Publication Date 23.07.1981
International Application No. PCT/US1981/000006
International Filing Date 05.01.1981
IPC
H04B 7/185 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations
CPC
H04B 7/18528
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
BTRANSMISSION
7Radio transmission systems, i.e. using radiation field
14Relay systems
15Active relay systems
185Space-based or airborne stations; ; Stations for satellite systems
18528Satellite systems for providing two-way communications service to a network of fixed stations, i.e. fixed satellite service or very small aperture terminal [VSAT] system
Applicants
Inventors
Priority Data
10950504.01.1980US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MULTIPLE CARRIER MICROWAVE RELAY LINK
(FR) LIAISON DE RELAIS PAR MICRO-ONDES PORTEUSES MULTIPLES
Abstract
(EN)
In satellite communication systems it is often necessary to relay the signal between terminal stations (10, 12) and the satellite (14) through ground relay stations (16, 18) remote from the terminal stations (10, 12). Normally, in systems using composite multi-carrier signals for transmission through the satellite (14), the composite multi-carrier signals are reduced to baseband in the ground relay station (16, 18) prior to retransmission. To reduce the amount of equipment and the cost of such a ground relay station (16, 18), a method and apparatus for relaying the composite multi-carrier signal through the ground relay station (16, 18) without reducing it to baseband in the ground relay station (16, 18) is provided. Thus, with this arrangement, the composite multi-carrier nature of the signal is preserved throughout the ground relay station (16, 18).
(FR)
Dans des systemes de communication par satellite, il est souvent necessaire de relier le signal entre des stations terminales (10, 12) et le satellite (14) par l'intermediaire de stations de relais au sol (16, 18) eloignees des stations terminales (10, 12). Normalement, dans des systemes utilisant des signaux composites d'ondes multi-porteuses pour la transmission par le satellite (14), les signaux composites multiporteurs sont reduits a une bande de base dans la station de relais au sol (16, 18) avant la retransmission. Pour reduire la quantite de materiel et le cout d'une telle station de relais au sol (16, 18), un procede et un appareil de relais du signal composite multi-porteur passant par la station de relais au sol (16, 18) sans le reduire a une bande de base dans la station de relais au sol (16, 18) sont mis au point. Ainsi, avec ce dispositif, la nature multi-porteuse composite du signal est preservee au niveau de la station de relais au sol (16, 18).
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