电子学报 ›› 2022, Vol. 50 ›› Issue (4): 849-859.DOI: 10.12263/DZXB.20211185

• 智能时空信息服务技术 • 上一篇    下一篇

面向B5G/6G的GFDM信号高精度测距与定位研究

苏林林, 陈亮, 陈菲菲, 周鑫, 焦振航, 刘钊良   

  1. 武汉大学测绘遥感信息工程国家重点实验室,湖北 武汉 430079
  • 收稿日期:2021-08-31 修回日期:2022-01-10 出版日期:2022-04-25 发布日期:2022-04-25
  • 作者简介:苏林林 女,1997年10月出生,河南商丘人.2020年于武汉大学电子信息学院获得学士学位,目前在武汉大学测绘遥感信息工程国家重点实验室攻读硕士学位.主要研究方向为5G基站通信算法、室内定位.E-mail: su.linlin@whu.edu.cn
    陈 亮(通讯作者) 男,1977年8月出生,江苏南通人.现为武汉大学教授、博士生导师.主要研究方向为导航新信号体制理论与方法、智能手机泛在定位、多源融合室内外无缝导航等.E-mail: l.chen@whu.edu.cn
  • 基金资助:
    国家自然科学基金(42171417);湖北省重点研发计划(2021BAA166);湖北珞珈实验室专项基金;武汉大学测绘遥感信息工程国家重点实验室自主科研基金

Research on High Precision Ranging and Positioning Based on GFDM Signal for B5G/6G

SU Lin-lin, CHEN Liang, CHEN Fei-fei, ZHOU Xin, JIAO Zhen-hang, LIU Zhao-liang   

  1. State Key Laboratory of Information Engineering in Surveying,Mapping and Remote Sensing,Wuhan University,Wuhan,Hubei 430079,China
  • Received:2021-08-31 Revised:2022-01-10 Online:2022-04-25 Published:2022-04-25

摘要:

广义频分复用(Generalized Frequency Division Multiplexing,GFDM)技术是在正交频分复用(Orthogonal Frequency Division Multiplexing,OFDM)技术基础上发展而来的一种新的多载波调制技术,其特点是子载波非正交以及具有灵活的时频资源配置.GFDM作为目前研究的主流波形,有望成为B5G(Beyond Fifth-Generation)或者6G(Sixth-Generation)时代移动通信技术的新的波形设计.本文提出了基于GFDM信号的高精度载波测距方法,其主要包括GFDM信号粗同步、导频检测、多径提取、首径获取、延迟跟踪和载波相位测距等步骤.在此基础上,利用GFDM信号测距信息进行了室内定位性能评估.在典型室内会议场景下搭建了实测平台并对上述方法进行了验证.测试结果表明,通过所提方法,利用GFDM信号测距精度达到1.1 m(95%),定位精度优于2 m,相比于相同带宽的OFDM信号测距性能提高了21%.本文研究将为下一代移动通信室内定位技术提供有益参考.

关键词: 无线室内定位, 广义频分复用, 压缩感知, 载波相位测距, 到达时间差

Abstract:

Generalized frequency division multiplexing(GFDM) is a novel multi-carrier modulation technology with the characteristics of subcarrier non-orthogonality and flexibility of time-frequency resources. GFDM is expected to become a new waveform design of mobile communication technology in the beyond fifth-generation(B5G) or sixth-generation(6G) era. This paper proposes a high-precision carrier ranging method based on GFDM signal, which mainly includes steps of coarse synchronization, pilot detection, multipath extraction, first path acquisition, delay tracking and carrier phase ranging. To verify the above-mentioned method, we built an experimental platform in typical indoor meeting scenarios. Test results showed that using GFDM signals the probability of ranging accuracy within 1.1 m is 95%, which is 21% better than the ranging performance of OFDM signals with the same bandwidth. In addition, the positioning error interval of GFDM is within 2 m. The research in this paper provides a useful reference for next-generation mobile communication indoor positioning technology.

Key words: wireless indoor positioning, generalized frequency division multiplexing, compressed sensing, carrier phase ranging, time difference of arrival

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