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认知无线电系统对TD-LTE主用户系统上下行配置类型的识别 被引量：2

Downlink/uplink Configuration Identification of TD-LTE Primary Systems in Cognitive Radios
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摘要 当与时分双工主用户系统共存时,认知无线电系统首先需要识别主用户系统在时间尺度上的传输方向,以便在不同链路上分别设计与执行后续的认知过程,从而优化认知系统的性能。在目前的研究中,均假设认知系统已先验已知主用户系统上下行链路在时间上的交替规律。在普适的认知场景下,该假设并不实际。该文依据双工通信系统上下行发射功率的差异,提出对TD-LTE主用户系统在时间尺度上传输方向的识别算法;基于此初步识别结果,进一步提出对TD-LTE系统上下行配置类型的识别算法。该方法无需主次系统之间的信息交互,实现简单。仿真表明,通过数个次级用户观察10个左右的TD-LTE帧,即可对其上下行配置类型达到95%以上的识别精度。 When the cognitive radios are coexisting with time division duplex systems, it should firstly find out the link directions of the primary systems for the separate design and implementation of the followed spectrum sensing and access. However, in the present studies, this information is assumed as prior information of the cognitive radios, which in fact is not practical in common scenarios. In this paper, a method based on the power levels on both links of TD-LTE is proposed to identify the link directions of subframes and the downlink/uplink configuration in the TD-LTE. This method needs not the cooperation between the primary and secondary systems. Simulations show that the method can meet a high accuracy when a few of frames and SUs are participated in the identification.
作者 饶毓 陈巍 曹志刚
机构地区 清华大学电子工程系
出处 《电子与信息学报》 EI CSCD 北大核心 2013年第11期2541-2546,共6页 Journal of Electronics & Information Technology
基金 国家自然科学基金重点项目(60832008) 国家自然科学基金-青年科学基金项目(60902001) 北京市教委科技发展计划重点资助项目(KZ2010100009009) 索尼中国研究院与清华合作项目资助课题
关键词 认知无线电 TD-LTE 上下行配置 合作检测 Cognitive radios TD-LTE Downlink/uplink configuration Cooperative detection
分类号 TN929.5 [电子电信—通信与信息系统]
  • 相关文献

参考文献15

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二级参考文献2

  • 13GPP TS 36.211, v8.4.0.Evolved universal terrestrial radio access (E-UTRA);physical channels and modulation
  • 23GPP TS 36.212, v8.4.0. Evolved universal terrestrial radio access (E-UTRA);multiplexing and channel coding

共引文献87

同被引文献21

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引证文献2

二级引证文献3

电子与信息学报
2013年 第11期

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