Feeder link configurations to support layered modulation for...

H - Electricity – 04 – B

Patent

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Details

H04B 7/185 (2006.01) H04B 7/204 (2006.01) H04B 7/208 (2006.01)

Patent

CA 2503432

Systems and methods are disclosed for feeder link configurations to layered modulation. One feeder link system (13A) employs feeder link spot beam to antennas in distinct coverage areas to enable frequency reuse. In this system 1300, the uplink signals (116) comprise two distinct feeder link signals (1302A, 1302B). Feeder link spot beam antennas (1304A, 1304B) can be employed on the satellite (108) to reuse feeder link spectrum in order to not exceed bandwidth of the layered modulation on the downlink. The feeder link system (1300) includes a first feeder link antenna (1306A) and a second feeder link antenna (1306B) transmitting the first link signal at first frequency and the second link signal at second frequency respectively. Although the two feeder link frequencies are in substantially the same frequency band, the use of spot beam antennas (1304, 1304B) with distinct coverage areas (1308A, 1308B) prevents the first and second feeder link signals (1304A, 1304B) from interfering.

L'invention concerne des systèmes et des procédés permettant d'utiliser des configurations de liaison de connexion destinées à supporter une modulation en couches. Un premier système de liaison de connexion permet d'utiliser un faisceau de points de liaison de connexion avec des antennes dans des zones de couverture distinctes afin de permettre la réutilisation d'une fréquence. Un deuxième système utilise une antenne à liaison de connexion à faisceau étroit afin d'éclairer des satellites individuels, ce qui permet également de réutiliser une fréquence. Un troisième système utilise une modulation en couches dans la liaison de connexion. Un dernier système de liaison de connexion utilise une modulation synchrone d'ordre plus élevé que celle utilisée dans les signaux de liaison descendante à modulation en couches pour une liaison de connexion de satellite.

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