Analysis of the cognitive nodes position in heterogeneous wireless networks
Jiang Jian-lun · Transducer and Microsystem Technologies · 2011
Aiming at the problem of the capacity of cooperative detection heterogeneous wireless networks,a cooperative decision strategy based on signal correlation is proposed and a cyclic symmetry pre-arrangement method is designed to improve the detection capability for primary users in determined area.The method can not only decreases the false detection probability of hidden terminals,but also achieves the detection of duplex status of primary users in heterogeneous wireless networks based on non-protocol analysis.The simulation results show that the pre-arrangement method of cognitive users improves the detection capability for primary user,and maximizes the opportunity of cognitive users to access the unused spectrum while preventing interference to the primary user.