发明名称 |
Method and system for transmitting radio signals between a fixed terrestrial station and user mobile terminals via a network of satellites |
摘要 |
The invention concerns a method and a system for transmitting radio signals between a fixed terrestrial station and mobile user terminals via a network of satellites in inclined circular orbits having a radius less than that of geostationary orbits. The beams generated are divided into pencil beams each associated with a continuous sub-band of frequencies in increasing frequency or decreasing frequency order. The instantaneous transmission frequency is offset progressively during the call towards the frequency subband of the adjacent pencil beam, at a rate proportional to the orbital rotation speed, to enable switching between pencil beams or between satellites. Applications include transmission via satellites in non-geostationary orbit.
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申请公布号 |
US5765098(A) |
申请公布日期 |
1998.06.09 |
申请号 |
US19960676802 |
申请日期 |
1996.07.08 |
申请人 |
AGENCE SPATIALE EUROPEENNE |
发明人 |
BELLA, LUIGI |
分类号 |
H04B15/00;H04B7/15;H04B7/185;H04B7/204;H04Q7/38;(IPC1-7):H04B7/185 |
主分类号 |
H04B15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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