通信学报 ›› 2019, Vol. 40 ›› Issue (6): 82-89.doi: 10.11959/j.issn.1000-436x.2019145

• 学术论文 • 上一篇    下一篇

高动态BOC信号捕获算法

潘毅,张天骐,张刚,马宝泽   

  1. 重庆邮电大学通信与信息工程学院,重庆 400065
  • 修回日期:2019-05-24 出版日期:2019-06-25 发布日期:2019-07-04
  • 作者简介:潘毅(1988- ),男,浙江温州人,重庆邮电大学博士生,主要研究方向为BOC信号捕获和跟踪技术等。|张天骐(1971- ),男,四川眉山人,重庆邮电大学教授、博士生导师,主要研究方向为通信信号的调制解调、盲处理、语音信号处理、神经网络实现及FPGA、VLSI实现。|张刚(1976- ),男,四川巴中人,博士,重庆邮电大学副教授,主要研究方向为微弱信号检测和混沌保密通信。|马宝泽(1990- ),男,河北廊坊人,重庆邮电大学博士生,主要研究方向为盲信号分离和特征提取等。
  • 基金资助:
    国家自然科学基金资助项目(61671095);国家自然科学基金资助项目(61702065);国家自然科学基金资助项目(61701067);国家自然科学基金资助项目(61771085);信号与信息处理重庆市市级重点实验室建设基金资助项目(CSTC2009CA2003);重庆市研究生科研创新基金资助项目(CYS17219);重庆市教育委员会科研基金资助项目(KJ1600427);重庆市教育委员会科研基金资助项目(KJ1600429)

Acquisition algorithm for BOC signals in high dynamic environment

PAN Yi,ZHANG Tianqi,ZHANG Gang,MA Baoze   

  1. College of Telecommunication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China
  • Revised:2019-05-24 Online:2019-06-25 Published:2019-07-04
  • Supported by:
    The National Natural Science Foundation of China(61671095);The National Natural Science Foundation of China(61702065);The National Natural Science Foundation of China(61701067);The National Natural Science Foundation of China(61771085);The Project of Key Laboratory of Signal and Information Processing of Chongqing(CSTC2009CA2003);Chongqing Graduate Research and Innovation Project(CYS17219);The Research Project of Chongqing Educational Commission(KJ1600427);The Research Project of Chongqing Educational Commission(KJ1600429)

摘要:

针对传统的捕获算法无法实现高动态环境下二进制偏移载波(BOC)信号同步问题,设计了一种分数阶傅里叶变换(FRFT)与离散多项式相位变换(DPT)相结合的捕获算法。该算法首先根据定阶运算得到接收信号的动态阶数来判定是否需要进行降阶处理,然后通过对FRFT捕获算法输出的谱峰值搜索得到动态参数和码相位的估计值来完成捕获。理论分析和仿真结果表明,所提算法在原有FRFT捕获算法的基础上消除了二阶多普勒变化率的影响,能够成功捕获到高动态 BOC 信号。与其他算法相比,所提算法进一步增强了整个捕获结构的动态适应能力和抗噪性能,并且在检测概率和捕获时间方面具有优越的性能。

关键词: 高动态, 捕获, 分数阶傅里叶变换, 离散多项式相位变换, 二进制偏移载波信号

Abstract:

As the synchronization of binary offset carrier (BOC) signals couldn’t be realized in high dynamic environment by traditional acquisition algorithms,an acquisition algorithm based on fractional Fourier transform (FRFT) and discrete polynomial-phase transform (DPT) was proposed.Firstly,the algorithm determined how to process the received signal according to the dynamic order obtained by the order operation.And then the acquisition was achieved by searching the spectral peak of the FRFT algorithm to obtain the estimation of dynamic parameters and code phase.Theoretical analysis and simulations show that the proposed algorithm eliminates the influence of second-order doppler shift rate based on original FRFT acquisition algorithm,which can successfully capture high dynamic BOC signals.The proposed algorithm further enhances the dynamic adaptability and anti-noise performance and has superior performance in detection probability and acquisition time in comparison with other algorithms.

Key words: high dynamic, acquisition, fractional Fourier transform, discrete polynomial-phase transform, binary offset carrier signal

中图分类号: 

  • TN911