H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/185 (2006.01) H04B 7/204 (2006.01)
Patent
CA 2116733
A transmission apparatus for an orbiting satellite which can establish stabilized frame synchronization even if the distance between the orbiting satellite and a communications terminal varies and which can minimize the displacement between a frame signal received on the ground and another frame signal generated in a communications terminal. The transmission apparatus comprises M (M is a an integral number equal to or greater than 2) composers for forming frame signals, M transmitters for outputting M spot beams having different radiation directions, and M delay circuits interposed between the composers and the transmitters. The delay times of the delay circuits are set so that they are long where the radiation angles of the corresponding spot beams are small, but they are shorter where the radiation angles are larger.
Dispositif de transmission pour satellite orbital, capable d'établir une synchronisation de trame stabilisée même si la distance varie entre le satellite orbital et un terminal de communication, et de réduire au minimum le déplacement entre un signal de trame reçu au sol et un autre signal de trame généré par un terminal de communication. Le dispositif de transmission comprend M (M étant un nombre entier égal ou supérieur à 2) composeurs pour former les signaux de trame, M émetteurs pour produire M faisceaux étroits ayant différentes directions de rayonnement et M circuits à retard interposés entre les composeurs et les émetteurs. Les retards des circuits à retard sont fixés de manière qu'ils soient longs lorsque les angles de rayonnement des faisceaux étroits correspondants sont petits, mais plus courts lorsque les angles de rayonnement sont plus grands.
Corporation Nec
Smart & Biggar
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