发明名称 |
Method for detecting unused frequency bands in cognitive radio network |
摘要 |
A method detects unused frequency bands in a cognitive radio network. Multiple frequency bands for RF signals are sensed using an antenna array including a plurality of elements coupled to a receive RF chain, in which the plurality of elements are individually controllable. For each frequency band, multiple spatial directions are sensed for the RF signals using the antenna array. A particular frequency band and a particular direction and a particular time slot are assigned as an available frequency band, an available direction and a particular time slot for transmitting RF signals in a cognitive radio if the RF signals are not sensed in the particular spatial direction for the particular frequency band, and in which the RF signals are transmitted by a transmit chain connected to the antenna array. |
申请公布号 |
EP1942690(B1) |
申请公布日期 |
2016.07.27 |
申请号 |
EP20070291548 |
申请日期 |
2007.12.18 |
申请人 |
MITSUBISHI ELECTRIC CORPORATION |
发明人 |
TEO, KOON HOO;ZHANG, HONGYUAN;NAKACHE, YVES-PAUL N.;ZHANG, JINYUN |
分类号 |
H04L27/00;H04L5/00;H04W16/14;H04W16/28;H04W24/00;H04W72/04;H04W72/08 |
主分类号 |
H04L27/00 |
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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