很好的关于认知无线电的综述，对频谱感知，频谱管理以及动态接入方法进行了很详尽的阐述-Good overview on cognitive radio, spectrum sensing, spectrum management, and dynamic access methods are very detailed exposition

MAC 802.11CSMA/CA算法设计与研究实现认知网络中的动态频谱接入-MAC 802.11CSMA/CA recognition algorithm design and implementation of dynamic spectrum access networks