无线自组织通信中基于前导符号的定时同步

doi:10.3969/j.issn.1001-506X.2020.06.22

系统工程与电子技术 ›› 2020, Vol. 42 ›› Issue (6): 1372-1378.doi: 10.3969/j.issn.1001-506X.2020.06.22

无线自组织通信中基于前导符号的定时同步

王琛^1,²(), 王芳¹(), 李明齐¹()

1. 中国科学院上海高等研究院, 上海 201210
2. 中国科学院大学电子电气与通信工程学院, 北京 100049

收稿日期:2019-09-16 出版日期:2020-06-01 发布日期:2020-06-01
作者简介:王琛(1994-),女,博士研究生,主要研究方向为无线通信、认知无线电。E-mail:wangchen@sari.ac.cn|王芳(1978-),女,高级工程师,博士,主要研究方向为信道编解码、物理层算法。E-mail:wangfang@sari.ac.cn|李明齐(1971-),男,研究员,博士研究生导师,博士,主要研究方向为智能广播网、基于GPP的软件无线电。E-mail:limq@sari.ac.cn
基金资助:
上海市技术标准专项项目(18DZ2203900);上海市优秀学术带头人项目(18XD1404100)

Timing synchronization for wireless ad hoc communication based on preamble symbol

Chen WANG^1,²(), Fang WANG¹(), Mingqi LI¹()

1. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
2. School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-09-16 Online:2020-06-01 Published:2020-06-01
Supported by:
上海市技术标准专项项目(18DZ2203900);上海市优秀学术带头人项目(18XD1404100)

摘要/Abstract

摘要：

传统的基于自相关的和基于互相关的定时同步算法具有相关峰的旁瓣较宽或对载波频率偏移(carrier frequency offset, CFO)敏感的问题,均无法满足无线自组织通信系统对快速准确的定时同步的需求。针对这一问题,提出了一种新的基于改进互相关的定时同步算法,通过将一个长的相关器拆分为两个较短子相关器的乘积,使度量函数的主峰更加尖锐、次峰更低,理论分析了算法的抗频偏性和计算复杂度。对所提算法和传统互相关算法的蒙特卡罗仿真结果表明，在复杂度相当的前提下,所提算法在检测准确率上具有1.1 dB的性能增益,且对频偏的鲁棒性较好。

关键词: 无线自组织通信, 定时同步, 前导符号, 互相关

Abstract:

The traditional auto-correlation-based timing synchronization and the cross-correlation-based timing synchronization have the disadvantage that the sidelobe of the correlation peak is too wide or the timing metric is sensitive to carrier frequency offset (CFO). Neither of them can meet the fast and accurate timing synchronization requirement of wireless ad hoc communication system. To address these issues, this paper proposes a new timing synchronization algorithm based on the improved cross-correlation. By splitting a long correlator into the product of two parallel sub-correlators, the new method makes the main peak sharper and the second peak lower. The sensitivity to CFO and computational complexity are theoretically analyzed. The Monte Carlo simulation results of the proposed and the traditional cross-correlation timing algorithm show that while remaining the complexity level the proposed method has a gain of 1.1 dB in terms of detection accuracy and the CFO robustness is better.

Key words: wireless ad hoc communication, timing synchronization, preamble symbol, cross-correlation

中图分类号:

TN92

王琛, 王芳, 李明齐. 无线自组织通信中基于前导符号的定时同步[J]. 系统工程与电子技术, 2020, 42(6): 1372-1378.

Chen WANG, Fang WANG, Mingqi LI. Timing synchronization for wireless ad hoc communication based on preamble symbol[J]. Systems Engineering and Electronics, 2020, 42(6): 1372-1378.

图/表 13

图1

图2

图3

图4

图5

表1

图6

图7

图8

图9

图10

图11

图12

参考文献 20

1	SHARMILA S, SHANTHI T. A survey on wireless ad hoc network: issues and implementation[C]//Proc.of the IEEE International Conference on Emerging Trends in Engineering, Technology and Science, 2016. DOI: 10.1109/ICETETS.2016.7603071.
2	SAKHAEE E , JAMALIPOUR A . The global in-flight internet[J]. IEEE Journal on Selected Areas in Communications, 2006, 24 (9): 1748- 1757. doi: 10.1109/JSAC.2006.875122
3	谷文哲.航空自组网QoS路由技术研究[D].北京:北京邮电大学, 2012.
	GU W Z. Research on QoS routing technology of aeronautical ad hoc networks[D]. Beijing: Beijing University of Posts and Telecommunications, 2012.
4	BAUMGARTNER S, EL Y, SHEHADEH H, et al. A modified symbol timing and frequency synchronization method based on cyclic prefix for OFDM systems[C]//Proc.of the 25th International Conference Radioelektronika, 2015. DOI: 10.1109/RADIOELEK.2015.7129058.
5	SCHMIDL T M , COX D C . Robust frequency and timing synchronization for OFDM[J]. IEEE Trans.on Communications, 1997, 45 (12): 1613- 1621. doi: 10.1109/26.650240
6	MINN H , ZENG M , BHARGAVA V K . On timing offset estimation for OFDM systems[J]. IEEE Communications Letters, 2000, 4 (7): 242- 244. doi: 10.1109/4234.852929
7	MINN H , BHARGAVA V K , LETAIEF K B . A robust timing and frequency synchronization for OFDM systems[J]. IEEE Trans.on Wireless Communications, 2003, 24 (5): 822- 839. doi: 10.1109/TWC.2003.814346
8	PARK B , CHEON H , KANG C , et al. A novel timing estimation method for OFDM systems[J]. IEEE Communications Letters, 2003, 7 (5): 239- 241. doi: 10.1109/LCOMM.2003.812181
9	ABDZADEH-ZIABARI H , SHAYESTEH M G . Sufficient statistics, classification, and a novel approach for frame detection in OFDM systems[J]. IEEE Trans.on Vehicular Technology, 2013, 62 (6): 2481- 2495. doi: 10.1109/TVT.2013.2240027
10	MOHEBBI A , ABDZADEH-ZIABARI H , SHAYESTEH M G . Novel coarse timing synchronization methods in OFDM systems using fourth-order statistics[J]. IEEE Trans.on Vehicular Technology, 2015, 64 (5): 1904- 1917. doi: 10.1109/TVT.2014.2336754
11	ZHANG J A , HUANG X J . Auto-correlation based coarse timing with differential normalization[J]. IEEE Trans.on Wireless Communications, 2012, 11 (2): 526- 530. doi: 10.1109/TWC.2011.111611.110444
12	ABDZADEH-ZIABARI H , ZHU W P , SWAMY M N S . Improved coarse timing estimation in OFDM systems using high-order statistics[J]. IEEE Trans.on Communications, 2016, 64 (12): 5239- 5253. doi: 10.1109/TCOMM.2016.2611669
13	LIU Y , TAN Z , XU S , et al. Timing synchronization for orthogonal frequency division multiplexing using improved cross-correlation[J]. IET Communications, 2012, 6 (9): 1137- 1143. doi: 10.1049/iet-com.2011.0039
14	MA Y S, ZHOU S W, YAN C X, et al. Design of OFDM timing synchronization based on correlations of preamble symbol[C]//Proc.of the 83rd Vehicular Technology Conference, 2016. DOI: 10.1109/VTCSpring.2016.7504190.
15	杨卓凯, 周亮. 极低信噪比下的"极大检测—二次相关"帧同步算法[J]. 北京信息科技大学学报(自然科学版), 2015, 30 (2): 9- 13.
	YANG Z K , ZHOU L . "Maximum detection-secondary correlation" frame synchronization algorithm for very low SNR conditions[J]. Journal of Beijing Information Science & Technology University, 2015, 30 (2): 9- 13.
16	WU Z, ZHANG Y, JIANG L, et al. Novel preamble-aided symbol timing estimation for burst communication[C]//Proc.of the International Conference on Communication Software & Networks, 2015: 221-226.
17	ZHAO W, ZHANG Y, ZHANG H. A burst SC-FDE scheme for high-speed communication based on radar[C]//Proc.of the Military Communications Conference, 2013: 1541-1546.
18	MASSEY J . Optimum frame synchronization[J]. IEEE Trans.on Communications, 1972, 20 (2): 115- 119. doi: 10.1109/TCOM.1972.1091127
19	MORELLI M , MENGALI U . Carrier-frequency estimation for transmissions over selective channels[J]. IEEE Trans.on Communications, 2000, 48 (9): 1580- 1589. doi: 10.1109/26.870025
20	STUBER G L , BARRY J R , MCLAUGHLIN S W , et al. Broadband MIMO-OFDM wireless communications[J]. Proceedings of the IEEE, 2004, 92 (2): 271- 294. doi: 10.1109/JPROC.2003.821912

运算操作	实数乘	实数加
所提度量函数	2N(4N+6)	2N(4N+1)
传统互相关度量函数	2N(4N+2)	2N(4N+1)

[1]	金国栋, 薛远亮, 谭力宁, 许剑锟. 基于孪生神经网络的目标跟踪算法进展研究[J]. 系统工程与电子技术, 2022, 44(6): 1805-1822.
[2]	张聿远, 张立民, 闫文君. 基于互相关特征图和扩张稠密卷积网络的SFBC-OFDM识别方法[J]. 系统工程与电子技术, 2021, 43(9): 2657-2664.
[3]	闫文君, 张聿远, 凌青, 于柯远, 谭凯文, 刘恒燕. 基于频域互相关序列与峰值检测的空频分组码盲识别算法[J]. 系统工程与电子技术, 2021, 43(12): 3709-3715.
[4]	郝志梅, 孙进平, 罗美方. 基于复合频率编码的低截获概率波形簇设计[J]. 系统工程与电子技术, 2021, 43(11): 3137-3143.
[5]	凌青, 闫文君, 张立民, 于柯远. AL-OFDM和SM-OFDM空频分组码信号盲识别方法[J]. 系统工程与电子技术, 2021, 43(1): 19-25.
[6]	张民, 李宗浩, 高明. 基于Lorenz混沌的MIMO雷达信号设计及性能分析[J]. 系统工程与电子技术, 2018, 40(1): 58-64.
[7]	赵强, 侯孝民, 焦义文. 宽带干涉测量通道群时延非线性误差标校[J]. 系统工程与电子技术, 2017, 39(6): 1221-1226.
[8]	许成谦, 马雅楠. 二维时频低碰撞区跳频序列集的构造[J]. 系统工程与电子技术, 2017, 39(4): 905-909.
[9]	薛海伟, 冯大政. #br# 解析搜索偏移量的InSAR图像精配准方法[J]. 系统工程与电子技术, 2016, 38(8): 1787-1793.
[10]	黄中瑞, 牛朝阳, 张剑云. 基于序列锥规划的MIMO雷达正交连续相位编码波形设计[J]. 系统工程与电子技术, 2015, 37(9): 2000-2009.
[11]	许成谦, 王嘉星. 跳频序列偶相关函数及其理论界研究[J]. 系统工程与电子技术, 2015, 37(2): 412-416.
[12]	李磊1,3, 李国林2. 通道幅相误差条件下的相干信源波达方向估计[J]. 系统工程与电子技术, 2015, 37(10): 2222-2227.
[13]	毕凯，王晓丹，邢雅琼. 基于D-S证据理论的模糊聚类集成[J]. 系统工程与电子技术, 2014, 36(7): 1446-1452.
[14]	顾浙骐，魏宁，张忠培. 非对称定时同步对协作多点下行传输的影响[J]. 系统工程与电子技术, 2014, 36(5): 985-990.
[15]	赵永波, 李慧, 覃春淼. 基于GASA算法的DFCW-LFM波形设计[J]. 系统工程与电子技术, 2014, 36(11): 2186-2191.

无线自组织通信中基于前导符号的定时同步

Timing synchronization for wireless ad hoc communication based on preamble symbol

RichHTML

PDF (PC)

可视化

摘要/Abstract

引用本文

使用本文

图/表 13

参考文献 20

相关文章 15

编辑推荐

Metrics

本文评价