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- W2614890608 abstract "In this paper design of Store and Forward (S&F) communication payload for a Sina-1satellite is presented. The S&F subsystem uses VHF and UHF radio links for receiving and transmitting messages. It provides digital communication facilities between a numbers of satellite radio operators. The main purpose of the system is to provide the handling of transmitting/receiving of packet type messages via satellite. A message from one ground terminal is stored in memory on the satellite and delivered as the satellite passes over the destination ground terminal. The two ground terminals do not have to see the satellite at the same time, and a single satellite can provide global communications coverage. The main specifications of store and forward subsystem are calculated and presented. Split channel reservation multiple access (SRMA) protocol is used as the multiple access protocol. The effect of different parameters such as the number of users, packet length and visibility time is analyzed. Phase shift keying (PSK) modulation is used for downlink and uplink transmissions. In order to improve the performance of satellite communications link, error correction technique is used in this payload. Link calculation reveals that a packet service of 4.8 kbps can be provided without satellite tracking mechanisms. Finally the structure diagram of the on-board S&F transceiver is presented." @default.
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- W2614890608 date "2016-09-26" @default.
- W2614890608 modified "2023-09-26" @default.
- W2614890608 title "Store and Forward Communication Payload Design for LEO Satellite Systems" @default.
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