摘要
现有无线频谱资源分配的研究,大多利用频谱感知的理想结果,以静态且与资源分配相独立的假设为主,在现实条件下很难满足。针对上述问题,提出多信道频谱感知与资源分配联合优化方法,通过引入一个通用的矢量接入模型,以描述单用户和多用户两种情景下多信道接入方式,设计在对授权用户一定干扰水平下的满足非授权用户最大吞吐量的最优策略,以权衡频谱感知参量、信道接入方式与功率分配策略之间的关系。仿真结果表明,多信道频谱感知与资源分配最优方法,不仅弱化非理想上报信道对频谱感知性能的影响,而且提高了信道频谱资源分配性能。
Previous researches on spectrum allocation are always based on the assumption that the results of spectrum sensing are conventionally regarded as perfect, static and treated independently from the resource allocation. However, these assumptions are difficult to meet under realistic applications. In this paper, the joint optimization of cooperative spectrum sensing and power allocation was investigated. An access ratio was introduced to describe the channel-access strategies in both cooperative and non-cooperative schemes. Based on the transmit power constraint of secondary users （SUs） over multiple channels, an optimization problem of multi-channel cooperative spectrum sens- ing was formulated to maximize the SUs＇ sum throughput while keeping the interference to primary users under a specified threshold. Numerical results were presented to verify the performance of the approaches.
出处
《计算机仿真》
CSCD
北大核心
2016年第1期209-213,共5页
Computer Simulation
基金
国家自然科学基金资助项目(61501178
61471162)
湖北省自然科学基金资助项目(2015CFB646)
太阳能高效利用湖北省协同创新中心开放基金资助项目(HBSKFMS2014033)
湖北工业大学博士科研启动基金资助项目(BSQD13029)
关键词
协作频谱感知
信道接入
多信道感知
功率分配中国
Cooperative spectrum sensing
Channel access
Multi-channel sensing
Power allocation
