supported by the National Basic Research Program of China (2009CB320405 and 2012CB316104);the National Natural Science Foundation of China (60972057);the Supporting Program for New Century Excellent Talents in Universities (NCET-09-0701)
As a smart combination of cognitive radio networks and wireless sensor networks,recently introduced cognitive radio sensor network(CRSN) poses new challenges to the design of topology maintenance techniques for dynami...
supported by the National Basic Research Program of China (2009CB320405);National Natural Science Foundation of China(61071102);National Science and Technology Major Project of China(2010ZX03006-002-02 and 2010ZX03005-003);the Foundation Project of National Key Laboratory of Science and Technology on Communications (9140C0202061004)
For a hierarchical cognitive radio network(CRN),the secondary users(SUs) may access the licensed spectrum opportunistically,whenever it is not occupied by the primary users(PUs).An important issue for this kind of CRN...
A Cognitive radio communication link is possible to be interrupted easily when its physical channel suffers severe fading. Relay technology is an effective way to mitigate the fading effect of wireless channels in a n...