摘要
针对认知TD-LTE-A异构网的频谱感知中需要在较短时间内同时感知多个异构信道的问题,提出一种基于遗传算法的多信道频谱感知方法。首先,建立认知TD-LTE-A异构网频谱感知的系统模型;然后,根据系统模型定义系统效用、感知收益以及由感知错误引起的系统开销概念;最后,利用遗传算法有效解决多个认知用户在较短感知时隙内共同感知多个异构信道的问题。仿真结果表明,本文方法相比其他3种方法,能够获得较高总系统效用,且需要较少认知用户参加合作频谱感知。这对提高系统效用与降低移动节点能耗具有重要意义。因此,本文方法适用于对系统效用和节点能耗敏感的认知TD-LTE-A异构网,能更好地实现异构多信道频谱感知。
To solve the problem of how to sense the multiple heterogeneous channels simultaneously in cognitive TD-LTE-A heterogeneous network,a spectrum sensing method based on genetic algorithm for multiple channels is proposed in this paper.Firstly,the system model of spectrum sensing in cognitive TD-LTE-A heterogeneous network is established.Secondly,the concepts of the system utility,the sensing profit and the system overhead caused by misperception are defined according to the system model.Finally,the genetic algorithm is adopted to solve the problem of how to sense the multiple heterogeneous channels simultaneously in short sensing duration for multiple cognitive users.The simulation results show that the proposed method can obtain higher total system utility and require less cognitive users who participate in the cooperative spectrum sensing.It is significant for both improving system utility and reducing energy consumption of mobile nodes.Therefore,this method is suitable for the spectrum sensing for multiple heterogeneous channels in cognitive TD-LTE-A heterogeneous network which is sensitive to system utility and energy consumption of mobile nodes.
作者
富爽
王金金
祁广云
石莉莉
FU Shuang;WANG Jinjin;QI Guangyun;SHI Lili(College of Electrical and Information,Heilongjiang Bayi Agricultural University,Daqing,Heilongjiang 163319,China;College of Computer Science and Technology,Harbin Engineering University,Harbin 150001,China)
出处
《中国科技论文》
CAS
北大核心
2018年第23期2672-2678,共7页
China Sciencepaper
基金
黑龙江省青年科学基金资助项目(QC2015070)
黑龙江八一农垦大学博士科研启动基金资助项目(XDB2015-28)
黑龙江八一农垦大学自然科学人才支持计划资助项目(ZRCQC201807)
