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公开(公告)号：US07610036B2
公开(公告)日：2009-10-27
申请号：US11620759
申请日：2007-01-08
CPC分类号： H04W72/046 , H04L5/0062 , H04L27/0006 , H04W16/28 , H04W24/00 , H04W72/085
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.
摘要翻译： 一种方法检测认知无线电网络中的未使用频带。 使用包括耦合到接收RF链的多个元件的天线阵列感测用于RF信号的多个频带，其中多个元件可单独地控制。 对于每个频带，使用天线阵列检测RF信号的多个空间方向。 如果在特定空间方向上没有感测到RF信号，则将特定频带和特定方向以及特定时隙分配为可用频带，可用方向和用于在认知无线电中发送RF信号的特定时隙 特定频带，并且其中通过连接到天线阵列的发射链发射RF信号。
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公开(公告)号：US20080166974A1
公开(公告)日：2008-07-10
申请号：US11620759
申请日：2007-01-08
IPC分类号： H04B17/00
CPC分类号： H04W72/046 , H04L5/0062 , H04L27/0006 , H04W16/28 , H04W24/00 , H04W72/085
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.
摘要翻译： 一种方法检测认知无线电网络中的未使用频带。 使用包括耦合到接收RF链的多个元件的天线阵列感测用于RF信号的多个频带，其中多个元件可单独地控制。 对于每个频带，使用天线阵列检测RF信号的多个空间方向。 如果在特定空间方向上没有感测到RF信号，则将特定频带和特定方向以及特定时隙分配为可用频带，可用方向和用于在认知无线电中发送RF信号的特定时隙 特定频带，并且其中通过连接到天线阵列的发射链发射RF信号。
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