摘要
为了在频谱共享中减少主次系统之间干扰的同时提高认知系统的信息传输速率,提出了一种基于功率和带宽分配的双向协作频谱共享协议。在该协议中主次系统通过使用不同的带宽来传输信息以减少两者之间的干扰。认知用户使用双向协作的方式利用一部分带宽和功率帮助转发授权用户的信息,帮助其达到目标传输速率,作为交换剩余的带宽和功率资源则用于认知系统的信息传输。以最大化认知系统传输速率为目标,推导出了功率和带宽联合分配的最优分配系数。仿真结果表明与其他基准协议相比,该协议在减小了主次系统之间干扰的同时,认知系统的传输速率也有显著地提高。
In order to reduce interference between primary and cognitive systems and improve the rate of cognitive system,this paper proposes a two-way cooperative spectrum sharing protocol based on power and bandwidth allocation.In this method,the cognitive user uses a part of bandwidth and power to forward the primary signal help the primary users to achieve its target rate through two-way relaying.In return,the cognitive user uses remained bandwidth and power to transmit its own signal.The primary and cognitive systems use different bandwidth to transmit signal,avoiding interference between the two systems.Joint optimal bandwidth and power allocation is derived aiming to maximize cognitive transmission rate with primary transmission rate constraint.Simulation results demonstrate compared with several benchmark schemes this method can solve the interference between primary and cognitive systems,and the rate of the cognitive system has also significant enhancement.
作者
胡燕妃
任梦梦
翟旭平
Hu Yanfei;Ren Mengmeng;Zhai Xuping(Key Laboratory of Specialty Fiber Optics and Optical Access Networks,School of Communication and Information Engineering,Shanghai University,Shanghai 200072,China)
出处
《电子测量技术》
2019年第13期121-126,共6页
Electronic Measurement Technology
基金
国家自然科学基金项目(61171085、61401266)资助
关键词
功率分配
带宽分配
双向协作
频谱共享
power allocation
bandwidth allocation
two-way cooperative
spectrum sharing
