| 摘要(英) |
Satellite communication system has developed rapidly for its unique adavantages since it appeared and has become an essential part of telecommunication in the future. It’s for that the demand of communication bandwidth grows day by day with vigorous development of wireless communication to facilitate the broadband satellite to become the goal which countries all over the world positively want to develop. The technology of spread spectrum needs more bandwidth; therefore, it is the best way to accomplish the big bandwidth satellite communication. So that they all set about researching and developing the broadband satellite of high band, and hope that it can build and construct wide area, wide-band, and all visible wireless communication system to make that the coverage of the multimedia information can be extended borderlessly.
Because the technology of spread spectrume is limited to lack of frequency bandwidth, the “Big” bandwidth is the characteristic of the broadband satellite communication system that spread spectrum technology can use well. Therefore, spread spectrum technology plays an important role in the development of broadband satellite.The thesis based on the uniqueness and importance of broadband satellite, with the feature of broad bandwidth and spread spectrum technology would discuss the link-analysis and system scheme, and then Scheme of balanced power to evaluate the design of the the hybrid satellite communication systems combined with a conventional frequency-division multiple access (FDMA) system and a direct-sequence spread spectrum multiple access (DS-SSMA) system for the case of different types of ground based terminals to achieve that any unwanted intermoduation effect. We wish it useful to improve system scheme, design and application on the future broadband satellite communication. |
| 參考文獻 |
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