摘要
为满足认知用户对主用户的干扰约束,同时最大化认知用户的传输速率,提出了基于凸优化理论的最优功率分配方案。考虑到最优方案的计算复杂度较高,还提出一种复杂度较低的次优方案。仿真结果表明,在主用户可容忍的干扰约束下,次优方案的性能接近于最优方案。
In order to satisfy the interference constraint from secondary user to primary user and maximize secondary user＇s transmission rate, the optimal power allocation scheme based on convex optimization theory is proposed. Considering the complexity of optimal scheme, a suboptimal scheme with low complexity is also proposed. The simulation results show that the performance of suboptimal scheme is close to the optimal one under the tolerable interference power constraint of primary user.
出处
《电视技术》
北大核心
2009年第11期77-79,共3页
Video Engineering
基金
新世纪优秀人才支持计划项目(NCET-06-0778)
重庆市教委科学技术研究项目(KJ090501)
关键词
认知无线电
OFDM
功率分配
凸优化
认知用户
主用户
cognitive radio
OFDM
power allocation
convex optimization
secondary user
primary user
