面向B5G/6G的GFDM信号高精度测距与定位研究
Research on High Precision Ranging and Positioning Based on GFDM Signal for B5G/6G
- 电子学报 2022年50卷第4期 页码：849-859
- 作者机构：
武汉大学测绘遥感信息工程国家重点实验室，湖北武汉 430079
- 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" ]
- 基金信息：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
DOI：10.12263/DZXB.20211185
中图分类号： TN929.5;TN961收稿：2021-08-31，
修回：2022-01-10，
纸质出版：2022-04-25
- 稿件说明：
移动端阅览
苏林林,陈亮,陈菲菲等.面向B5G/6G的GFDM信号高精度测距与定位研究[J].电子学报,2022,50(04):849-859.
SU Lin-lin,CHEN Liang,CHEN Fei-fei,et al.Research on High Precision Ranging and Positioning Based on GFDM Signal for B5G/6G[J].ACTA ELECTRONICA SINICA,2022,50(04):849-859.
苏林林,陈亮,陈菲菲等.面向B5G/6G的GFDM信号高精度测距与定位研究[J].电子学报,2022,50(04):849-859. DOI： 10.12263/DZXB.20211185.
SU Lin-lin,CHEN Liang,CHEN Fei-fei,et al.Research on High Precision Ranging and Positioning Based on GFDM Signal for B5G/6G[J].ACTA ELECTRONICA SINICA,2022,50(04):849-859. DOI： 10.12263/DZXB.20211185.
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.
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.
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references
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