发明名称 |
Methods, apparatuses and system for asynchronous spread-spectrum communication |
摘要 |
A method of receiving data packets asynchronously transmitted by a plurality of user terminals using a spread-spectrum medium access protocol, comprises a step of cancelling interferences between colliding packets according to an innovative “sliding window” processing algorithm. A gateway receiver is adapted for carrying out interference cancellation using this algorithm. Asynchronous packet transmission from a user terminal is controlled by estimating a parameter indicative of the quality of information transmission through a communication channel; and inhibiting or allowing data transmission depending on a comparison between said estimated parameter and an adaptively varying threshold. A user terminal comprises transmission control means adapted for carrying out such a method. A communication system comprises a plurality of mobile user terminal communicating with a gateway through a satellite channel using an asynchronous spread-spectrum medium access protocol without closed-loop power control, wherein the user terminals and said gateway are of the kind described above.
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申请公布号 |
US7990874(B2) |
申请公布日期 |
2011.08.02 |
申请号 |
US20090547092 |
申请日期 |
2009.08.25 |
申请人 |
AGENCE SPATIALE EUROPEENNE |
发明人 |
DEL RIO HERRERO OSCAR;DE GAUDENZI RICCARDO |
分类号 |
H04L12/26;H04B1/707 |
主分类号 |
H04L12/26 |
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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