Distributed Resource Allocation in OFDM Cognitive Radio System
Fangwei Li · Video Engineering · 2013
In this paper,a new algorithm of distributed resource allocation in cognitive OFDM system is proposed,which is suitable to mixed service.In order to maximum the throughput of system,the allocation problem is modeled as a non-convex optimization problem which is solved by Lagrangian duality theory,in which the original problem is decomposed into several independent sub problems.Though solving the several sub problems,the optimal allocation results including sub carrier and power are obtained.In the meanwhile,according to the different type of service packets,the different cognitive users with the corresponding weight factor are provided.The simulation results demonstrate that the proposed algorithm not only improves the throughput of system but also satisfies the QoS of cognitive user,and have low complexity.