基于位置和干扰限制的认知中继选择算法

摘要

针对认知无线电网络传输速率不足及对主用户造成干扰等问题,提出一种基于位置和干扰限制的认知中继选择算法.该算法根据中继节点位置对中继链路速率的影响选择中继节点,同时在限制认知用户对主用户干扰的情况下,确定中继节点的最佳发射功率.仿真结果证明,该算法能满足认知用户对主用户干扰限制的要求,提高系统吞吐量.%Aiming at the problems of low transmission rate and the interference introduced to the primary user by cognitive users, this paper proposes a cognitive relay selection algorithm based on location and interference constraint, the relay is chosen according to the relation between the location of cognitive relay nodes and the transmission rate of the relay link, and the optimal transmitting power is determined under the interference restraint of cognitive users to primary users. Simulation results show that the algorithm can both increase the throughput and restrict the interference of cognitive users to primary users successfully.