波束扫描下5G毫米波小区搜索算法

doi:10.11959/j.issn.1000-0801.2020157

电信科学 ›› 2020, Vol. 36 ›› Issue (6): 97-106.doi: 10.11959/j.issn.1000-0801.2020157

波束扫描下5G毫米波小区搜索算法

申敏,梁晶,侯嘉智

重庆邮电大学通信与信息工程学院，重庆 400065

修回日期:2020-05-12 出版日期:2020-06-20 发布日期:2020-06-18
作者简介:申敏（1963- ），女，教授，重庆邮电大学博士生导师，主要研究方向为新一代宽带移动通信系统、通信核心芯片、协议与系统应用技术|梁晶（1994- ），女，重庆邮电大学硕士生，主要研究方向为5G物理层小区搜索|侯嘉智（1993- ），男，重庆邮电大学硕士生，主要研究方向为移动通信波束管理
基金资助:
国家科技重大专项基金资助项目(2018ZX03001026-002)

5G millimeter wave cell search algorithm with beam sweeping

Min SHEN,Jing LIANG,Jiazhi HOU

Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China

Revised:2020-05-12 Online:2020-06-20 Published:2020-06-18
Supported by:
The National Science and Technology Major Project(2018ZX03001026-002)

摘要/Abstract

摘要：

5G毫米波的载波频率高，初始接入频偏大，可能导致收发端时频同步不准确及物理小区标识检测错误问题。针对此问题，分析并仿真了5G毫米波在高频偏下基于波束扫描方式发送同步信号的小区搜索方案。提出了一种在基站侧使用DFT码本发送多方向的同步信号块，在终端用全向天线接收多波束信号并使用一系列同步算法完成时间、频率同步及物理小区标识检测的5G毫米波小区搜索过程。仿真结果表明，所提预存整数倍频偏与接收信号互相关的主同步信号检测算法在5G毫米波信道有良好的小区搜索性能。

关键词: 5G毫米波小区搜索, 波束扫描, 同步算法, 频偏估计

Abstract:

Due to the high carrier frequency of the 5G millimeter wave,a large initial access frequency may cause inaccurate time-frequency synchronization at the transmitting and receiving ends and incorrect detection of the physical layer cell identifier.A cell search scheme for 5G millimeter waves to send synchronization signals in a beam sweeping mode at high frequencies was analyzed and simulated.Specifically,a multi-directional synchronization signal block sent by a DFT codebook at the base station side was proposed.The terminal used an omnidirectional antenna to receive multi-beam signals and used a series of synchronization algorithms to complete time,frequency synchronization,and physical layer cell identification.Simulation results show that the proposed main synchronization signal detection algorithm with cross-correlation of pre-stored integer frequency offset and received signal has good cell search performance on 5G millimeter-wave channels.

Key words: cell search in 5G mmWave, beam sweeping, synchronization algorithm, frequency offset estimation

中图分类号:

TN929.5

申敏,梁晶,侯嘉智. 波束扫描下5G毫米波小区搜索算法[J]. 电信科学, 2020, 36(6): 97-106.

Min SHEN,Jing LIANG,Jiazhi HOU. 5G millimeter wave cell search algorithm with beam sweeping[J]. Telecommunications Science, 2020, 36(6): 97-106.

图/表 17

图1

图2

图3

表1

PSS检测算法复杂度对比"

方法	乘法次数/次	加减法次数/次
传统PSS信号互相关算法	3× N _sample × N_IFFT	3× N _sample ×(N_IFFT-1)
PSS信号分段互相关算法	3× N_sample×N_IFFT	$3 \times N_{sample} \times (\frac{N_{IFFT}}{M} - 1) \times M$
本文采用的算法	15× N_sample×N_IFFT	15× N_sample×(N_IFFT-1)

表1

图4

图5

表2

添加DFT码本的仿真参数"

参数	参数值
发送端 $N_{I D}^{(2)}$ l	119
子载波间隔	120 kHz
归一化频偏CFO	0
信道	CDL-C
信噪比	0 dB

表2

表3

PSS信号互相关仿真参数"

参数	参数值
发送端 $N_{I D}^{c e l l}$ l	119
子载波间隔	120 kHz
归一化频偏CFO	1
信道	CDL-C
信噪比	0 dB

表3

图6

图7

图8

图9

表4

FFO估计参数"

参数	参数值
接收信号	已补偿IFO的信号
发送端 $N_{I D}^{c e l l}$	119
接收信号残留FFO	0.4、0.8
信道	CDL-C、CDL-D、CDL-E+AWGN
信噪比	-20:10 dB

表4

图10

图11

图12

表5

不同CFO下的仿真参数"

参数	参数值
FFT/IFFT点数	512
CP点数	长CP：40，短CP：36
子载波间隔	120 kHz
频段	30 GHz
归一化频偏CFO	0/0.4/1.8
$N_{I D}^{c e l l}$	119
信道	CDL-C/CDL-D/CDL-E+AWGN
信噪比	-24:-4 dB

表5

参考文献 16

[1]	ALLIANCE N . 5G white paper[R]. 2015.
[2]	OSSEIRAN A , BOCCARDI F , BRAUN V ,et al. Scenarios for 5G mobile and wireless communications:the vision of the METIS project[J]. IEEE Communications Magazine, 2014,52(5): 26-35.
[3]	SUNDARESAN K , . 5G:an evolution towards a revolution[C]// Proceedings of the 24th Annual International Conference on Mobile Computing and Networking. New York:ACM Press, 2018: 659-659.
[4]	AGIWAL M , ROY A , SAXENA N . Next generation 5G wireless networks:a comprehensive survey[J]. IEEE Communications Surveys ＆ Tutorials, 2016,18(3): 1617-1655.
[5]	QIU J , KANDEEPAN S . Performance of frequency estimation techniques with phase noise in mm-Wave based 5G systems[C]// Proceeding of 2017 Asia Modelling Symposium (AMS). Piscataway:IEEE Press, 2017: 170-175.
[6]	RAO R S S , MALATHI P . A low complex cuckoo search optimizer based OFDM carrier frequency offset estimation for 5G wireless technology[J]. International Journal of Dynamics and Control, 2019: 1-10.
[7]	YANG X , MATTHAIOU M , YANG J ,et al. Hardware-constrained millimeter-wave systems for 5G:challenges,opportunities and solutions[J]. IEEE Communications Magazine, 2019,57(1): 44-50.
[8]	OMRI A , SHAQFEH M , ALI A ,et al. Synchronization procedure in 5G NR systems[J]. IEEE Access, 2019(7):4128641295.
[9]	JEON Y , PARK H , CHOI E . Synchronization and cell search procedure in 3GPP 5G NR systems[C]// Proceedings of 2019 21st International Conference on Advanced Communication Technology (ICACT). Piscataway:IEEE Press, 2019: 475-478.
[10]	HE Y , GU Y , BU S ,et al. Primary synchronization signal design for new radio technique in 5G communication system[C]// Proceedings of the 10th EAI International Conference on Mobile Multimedia Communications.ICST (Institute for Computer Sciences,Social-Informatics and Telecommunications Engineering). Piscataway:IEEE Press, 2017: 265-269.
[11]	GIORDANI M , POLESE M , ROY A ,et al. Initial access frameworks for 3GPP NR at mmWave frequencies[C]// Proceedings of 2018 17th Annual Mediterranean Ad Hoc Networking Workshop (Med-Hoc-Net). Piscataway:IEEE Press, 2018: 1-8.
[12]	3GPP.NR-physical channels and modulation(Release 15):TS38.211,V15.0.0[S]. 2018.
[13]	童辉 . 5G新空口设计:如何从LTE拓展与创新[J]. 电信科学, 2019,35(7): 17-26.
	TONG H . 5G new radio design:why/how to extend/innovate from LTE[J]. Telecommunications Science, 2019,35(7): 17-26.
[14]	3GPP.NR-physical layer procedures for control-Release 15:TS38.213,V.15.0.0[S]. 2018.
[15]	VAN DE BEEK J J , SANDELL M , BORIESSON P O . ML estimation of time and frequency offset in OFDM systems[J]. IEEE Transactions on Signal Processing, 1997,45(7): 1800-1805.
[16]	3GPP.NR-study on channel model for frequencies from 0.5 to 100 GHz-Release 15:TS38.901,V.15.0.0[S]. 2018.

波束扫描下5G毫米波小区搜索算法

5G millimeter wave cell search algorithm with beam sweeping

在线阅读

PDF下载

可视化

摘要/Abstract

引用本文

使用本文

图/表 17

参考文献 16

相关文章 3

Metrics

推荐阅读 0

[1]	李贝, 胡煜华, 王鑫炎, 许国平, 刘光海, 肖天, 成晨, 李一. 5G网络SSB 1+X波束技术应用研究[J]. 电信科学, 2022, 38(1): 150-158.
[2]	王增浩,杨丽花,程露,张捷,梁彦. 5G高速移动系统中基于BP神经网络的多普勒频偏估计方法[J]. 电信科学, 2020, 36(4): 83-90.
[3]	杨路,何萍,王珊. UFMC系统中的载波频率同步技术[J]. 电信科学, 2016, 32(11): 50-55.