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高动态环境下高阶双二进制偏移载波信号的精确捕获

张天骐 袁帅 刘董华 李群

张天骐, 袁帅, 刘董华, 李群. 高动态环境下高阶双二进制偏移载波信号的精确捕获[J]. 电子与信息学报, 2018, 40(11): 2728-2735. doi: 10.11999/JEIT180087
引用本文: 张天骐, 袁帅, 刘董华, 李群. 高动态环境下高阶双二进制偏移载波信号的精确捕获[J]. 电子与信息学报, 2018, 40(11): 2728-2735. doi: 10.11999/JEIT180087
Tianqi ZHANG, Shuai YUAN, Donghua LIU, Qun LI. Accurate Acquisition of High Order Double Binary Offset Carrier Signals for High Dynamic Environment[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2728-2735. doi: 10.11999/JEIT180087
Citation: Tianqi ZHANG, Shuai YUAN, Donghua LIU, Qun LI. Accurate Acquisition of High Order Double Binary Offset Carrier Signals for High Dynamic Environment[J]. Journal of Electronics & Information Technology, 2018, 40(11): 2728-2735. doi: 10.11999/JEIT180087

高动态环境下高阶双二进制偏移载波信号的精确捕获

doi: 10.11999/JEIT180087
基金项目: 国家自然科学基金(61671095, 61371164, 61702065, 61701067, 61771085),信号与信息处理重庆市市级重点实验室建设项目(CSTC2009CA2003),重庆市研究生科研创新项目(CYS17219),重庆市教育委员会科研项目(KJ1600427, KJ1600429)
详细信息
    作者简介:

    张天骐:男,1971年生,博士后,教授,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、神经网络实现以及FPGA, VLSI实现

    袁帅:男,1993年生,硕士生,研究方向为导航信号的捕获与跟踪

    刘董华:男,1992年生,硕士生,研究方向为通信信号盲估计

    李群:女,1991年生,硕士生,研究方向为直扩信号的盲处理

    通讯作者:

    袁帅  384774936@qq.com

  • 中图分类号: TN911

Accurate Acquisition of High Order Double Binary Offset Carrier Signals for High Dynamic Environment

Funds: The National Natural Science Foundation of China (61671095, 61371164, 61702065, 61701067, 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, KJ1600429)
  • 摘要: 针对高动态环境下双二进制偏移载波(DBOC)调制信号无法精确捕获的问题,该文提出一种基于部分匹配滤波结合快速傅里叶变换(PMF-FFT)的捕获方法。又针对捕获过程中相关损失和扇贝损失引起的检测性能降低问题,提出一种改进的捕获方法。该方法首先利用离散多项式相位变换(DPT)去除接收信号的高阶动态项,然后针对DBOC信号重新设计PMF-FFT算法;最后利用频谱校正法对FFT后的功率谱最大值进行校正。仿真结果表明,在同一条件下,该方法将检测概率提高了2 dB左右,并且有效缩短了捕获时间。
  • 图  1  DPT处理变化图

    图  2  不同 $X$ 值下归一化相关峰值

    图  3  捕获算法框图

    图  4  捕获仿真图

    图  5  不同窗函数下检测性能的对比

    图  6  累加次数对检测性能的影响

    图  7  频谱校正后的性能对比

    图  8  平均捕获时间

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出版历程
  • 收稿日期:  2018-01-23
  • 修回日期:  2018-07-19
  • 网络出版日期:  2018-08-03
  • 刊出日期:  2018-11-01

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