基于多时隙融合的LTE-U空闲信道评估算法
发布时间:2018-01-11 01:08
本文关键词:基于多时隙融合的LTE-U空闲信道评估算法 出处:《电子技术应用》2017年02期 论文类型:期刊论文
【摘要】:LTE-U是近年来3GPP提出的用于缓解授权频段通信压力的新兴技术,让LTE-U与Wi Fi在同信道高效共存是研究热点之一。首先建立了LTE-U与Wi Fi共存场景下的空闲信道评估(CCA)系统模型,随后提出了基于先听后说(LBT)的多时隙CCA方案。在此方案基础上,提出了4种数据融合算法,同时为降低判决复杂度引入了硬判决融合,并得到多时隙最优硬判决融合准则。理论分析和实验结果表明,所提的方案和算法可使CCA变得更加灵活,同时对信道状态的判定更加准确,可提升系统共存的效率。
[Abstract]:LTE-U is used for 3GPP in recent years proposed to alleviate the pressure of the emerging technology licensing band communication, let LTE-U and Wi Fi in the same channel, coexistence is one of the hot topics. First, LTE-U and Wi Fi coexistence of clear channel assessment scenarios established (CCA) system model, then put forward to listen to the said based on (LBT). Multi slot CCA scheme. Based on this, puts forward 4 kinds of data fusion algorithm, and to reduce the decision complexity into hard decision fusion, and multi slot optimal hard decision fusion rule. Theoretical analysis and experimental results show that the proposed scheme and algorithm can make CCA more flexible, at the same time to determine the channel state more accurately, can improve the system coexistence efficiency.
【作者单位】: 重庆邮电大学移动通信技术重点实验室;
【基金】:国家自然科学基金项目(61201205) 国家科技重大专项(2015ZX03001026-003) 重庆市自然科学基金(cstc2016jcyj A0595)
【分类号】:TN929.5
【正文快照】: 0引言 LTE-U(LTE in unlicensed spectrum)技术能够让运营商将其LTE系统部署于非授权频段,利用LTE的技术优势,提高非授权频段的频谱效率并缓解授权频段的通信压力[1]。 目前关于LTE-U的研究主要集中在如何让LTE-U与Wi Fi在同频段和谐共存。现有基于公平性考虑的方案是让LTE-,
本文编号:1407509
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