说明：   本书通过5章内容来阐述认知无线电及实现认知无线电的技术途径，介绍了超宽带认知无线电和IEEE 802.22标准
(This book, through Chapter 5 of the content on the realization of cognitive radio and cognitive radio technology means, introduced the Ultra-Wideband cognitive radio and the IEEE 802.22 standards)