电子学报 ›› 2017, Vol. 45 ›› Issue (11): 2754-2760.DOI: 10.3969/j.issn.0372-2112.2017.11.024

• 学术论文 • 上一篇    下一篇

基于对称帧结构的联合频相估计

余忠洋1,2, 白宝明1   

  1. 1. 西安电子科技大学综合业务网理论及关键技术国家重点实验室, 陕西西安 710071;
    2. 通信网信息传输与分发技术重点实验室, 河北石家庄 050081
  • 收稿日期:2016-06-23 修回日期:2017-02-22 出版日期:2017-11-25
    • 通讯作者:
    • 白宝明
    • 作者简介:
    • 余忠洋,男,1989年8月出生,安徽六安人.西安电子科技大学在读博士研究生,通信与信息系统专业.主要研究方向为编码调制技术、无线通信等.E-mail:844767740@qq.com
    • 基金资助:
    • 国家973计划项目 (No.2012CB316103); 国家自然科学基金 (No.91438101); 通信网信息传输与分发技术重点实验室开放课题 (No.KX162600032); 中央高校基本科研业务费专项资金资助 (No.JBG160103,XJS15019); 中国博士后科学基金 (No.2015M580819)

Joint Frequency-Phase Offset Estimation Based on a Symmetrical Frame Structure

YU Zhong-yang1,2, Bai Bao-ming1   

  1. 1. State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an, Shaanxi 710071, China;
    2. Science and Technology on Communication Networks Laboratory, Shijiazhuang, Hebei 050081
  • Received:2016-06-23 Revised:2017-02-22 Online:2017-11-25 Published:2017-11-25

摘要: 针对短突发通信系统中联合频相估计的剩余频偏对相偏估计的影响,首次引入对称帧结构的概念.首先,基于一种通用(非对称)帧结构,给出了对称帧结构的概念,并推导出基于此结构的数据辅助和非数据辅助两种同步模式下的载波参数估计克拉美罗界.然后,根据该对称帧结构下载波参数估计克拉美罗界的特征,提出了一种基于对称帧结构的联合频相估计.仿真结果表明,以基于最大似然准则的联合频相估计为例,相较于采用非对称帧结构的相偏估计,采用对称帧结构的相偏估计可以获得更低的均方误差和更大的抗频偏能力.

关键词: 联合频相估计, 对称帧结构, 频相估计解耦合, 载波同步

Abstract: Considering the impact of the joint frequency-phase offset estimation frequency error on the phase offset estimation in short burst communication systems,a symmetrical frame structure is introduced.First,based on a generalized (asymmetrical) frame structure we give a concept of the symmetrical frame structure and then develop the corresponding data-aided (DA) and non-data-aided (NDA) Cramer-Rao Bounds (CRBs) for the carrier parameter estimation.Then,according to the above CRB characteristic a joint frequency-phase offset estimation is proposed using the symmetrical frame structure.Taking the maximum likelihood (ML) based joint frequency-phase offset estimation for an example,simulation results show that the phase offset estimation based on the symmetrical frame structure can achieve lower mean square error (MSE) and have better ability against the large frequency offset compared with the phase offset estimation based on the asymmetrical frame structure.

Key words: joint frequency-phase offset estimation, symmetrical frame structure, frequency-phase offset estimation decoupling, carrier synchronization

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