无线电物理

而空闲频谱检测作为认知无线电物理层的关键技术之一，它是认知无线电系统能够正常工作的前提。

As an key technology of cognitive radio physical layer , idle spectrum detection is the premise of cognitive radio system to operate normally .

认知无线电物理层研究的关键技术包括频谱感知、频谱分析和决策、频谱共享等，其中频谱感知是认知无线电的核心技术，也是实现频谱管理和共享等后续工作的前提和基础。

The key technologies of cognitive radio physical layer include spectrum sensing , spectrum analysis and decision , spectrum sharing . Spectrum sensing is the core technology of cognitive radio and is the premise and foundation of spectrum management and sharing .

认知无线电网络中物理层频谱检测算法的研究

Study on Spectrum Sensing Algorithms of Physical Layer in Cognitive Radio Network

研究偶极子源产生的电磁场在地下或水下无线电通信和地球物理勘探领域有着重要的应用价值。

The investigation on electromagnetic fields by various dipole sources is of practical value in underground or submarine radio communication and geophysical exploration .

为了提高频谱利用率和减少节点间的干扰，引入认知无线电技术，在物理层对频谱进行动态管理，可避免传统方法所须的复杂的同步和路由算法。

In order to improve the spectrum utilization and to reduce the interference between the nodes , Cognitive Radio technology is introduced for dynamic management of spectrum in the physical layer , which can avoid complex synchronization and routing algorithms the traditional methods has .