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研究了在认知无线电(CR)网络中发送端波束成形的算法设计.为了保证服务质量,建立了以CR用户的中断概率和主用户的中断概率为约束条件,最小化CR网络发送端功率的数学优化问题.仿真结果表明,在发送端已知信道协方差误差分布的情况下,所提算法可有效控制各CR用户的发射功率,提高CR网络性能和降低对授权用户的干扰.
In order to ensure the quality of service, an algorithm is proposed to design the beamforming algorithm in the cognitive radio (CR) network, which is based on the assumption that the interruption probability of the CR users and the interruption probability of the primary users are constrained, and the transmit end power of the CR network is minimized Mathematical optimization problem.The simulation results show that the proposed algorithm can effectively control the transmit power of CR users, improve the performance of CR network and reduce the interference to authorized users under the condition of the known channel covariance error distribution at the sender.