Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (1): 25-28.

• 电子技术 • 上一篇    下一篇

基于四元数理论的时延估计方法

汪飞1, 王树勋2, 刘渝1   

  1. 1. 南京航空航天大学信息科学与技术学院, 江苏, 南京, 210016;
    2. 吉林大学通信工程学院, 吉林, 长春, 130012
  • 收稿日期:2007-12-17 修回日期:2008-03-19 出版日期:2009-01-20 发布日期:2010-01-03
  • 作者简介:汪飞(1976- ),男,副教授,博士,主要研究方向为谱估计和四元数理论.E-mail:wangxiaoxian@nuaa.edu.cn
  • 基金资助:
    国家自然科学基金(60572069);博士点专项科研基金(20050183073);南京航空航天大学科研创新基金(1004906363)资助课题

Time-delay estimation based on quaternion theory

WANG Fei1, WANG Shu-xun2, LIU Yu1   

  1. 1. Inst. of Information Science & Technology, Nanjing Univ. of Aeronautics and Astronautics, Nanjing 210016, China;
    2. Inst. of Communication Engineering, Jilin Univ., Changchun 130012, China
  • Received:2007-12-17 Revised:2008-03-19 Online:2009-01-20 Published:2010-01-03

摘要: 针对同一信号到达两个传感器的时延问题,首先提出用两路传感器将接收到的信号构造一个四元数信号模型;接着,构造该四元数模型的自相关函数;之后,构造该四元数模型自相关函数的Toeplitz矩阵,并对其进行分析,提出估计时延的核心思想。最后利用四元数矩阵右特征值分解方法,构造基于四元数的噪声子空间,并在已知信号频率参量的基础上,用四元数MUSIC方法估计出两个传感器接收到的时延。仿真实验证明了方法的有效性。

Abstract: In view of the time difference between two sensors caused by arriving signals early or late from the same source,a quaternion signal model using two sensors’ signals is established,and a Toeplitz matrix of that quaternion model is constructed.After analyzing the Toeplitz matrix,an estimation algorithm is presented.Finally,the right-eigenvalue decomposition of the quaternion matrix is used to construct a corresponding noise subspace and then a quaternion-MUSIC method is used to estimate time-delay when signal frequency is known.Simulation illustrates that the proposed method is effective.

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