电子学报 ›› 2013, Vol. 41 ›› Issue (2): 307-313.DOI: 10.3969/j.issn.0372-2112.2013.02.016

• 学术论文 • 上一篇    下一篇

一种串联结构数字载波环及其Z域噪声性能分析

韩孟飞, 王永庆, 吴嗣亮, 罗海坤   

  1. 北京理工大学信息与电子学院,北京 100081
  • 收稿日期:2012-06-11 修回日期:2012-11-23 出版日期:2013-02-25
    • 通讯作者:
    • 王永庆
    • 作者简介:
    • 韩孟飞 男,1982年生于河南项城.北京理工大学信息与电子学院博士研究生.主要研究方向为航天测控通信信号处理理论与应用. E-mail:hanmengfei@bit.edu.cn 吴嗣亮 男,1964年生于安徽绩溪.北京理工大学信息与电子学院教授、博士生导师.主要研究方向为雷达系统理论与技术,现代信号处理理论与应用,扩频信号处理理论与技术及其在无线电测控与卫星导航定位中的应用等. E-mail:siliangwu@bit.edu.cn罗海坤 男,1984年生于云南禄丰.北京理工大学信息与电子学院博士研究生.主要研究方向为航天测控技术. E-mail:luohaikun@bit.edu.cn
    • 基金资助:
    • 国家863高技术研究发展计划 (No.2011AA1569)

A Series-Connection Structure Digital Carrier Tracking Loop and Analysis of Its Noise Performance in Z Domain

HAN Meng-fei, WANG Yong-qing, WU Si-liang, LUO Hai-kun   

  1. School of Information and Electronic, Beijing Institute of Technology, Beijing 100081, China
  • Received:2012-06-11 Revised:2012-11-23 Online:2013-02-25 Published:2013-02-25
    • Supported by:
    • National High-tech R&D Program of China  (863 Program) (No.2011AA1569)

摘要: 提出一种具有串联环路结构的新型数字载波跟踪环,以解决极低载噪比下高动态载波信号的跟踪问题.在输入加性高斯白噪声假设下,通过建立具有一定通用性的Z域全相位模型,对新型载波环的噪声跟踪性能进行了理论分析,推导出相位噪声方差的计算通式.根据新型载波环的具体实例,验证了理论分析结果的正确性.基于上述分析结果,对新型载波环完成了参数优化,并对其与传统载波环进行了性能比较.结果表明,在极低载噪比高动态条件下,新型载波环跟踪性能优于传统载波环.所得结论可用于评估新型载波环的噪声跟踪性能或指导其环路设计.

关键词: 载波跟踪, 串联载波环, 加性高斯白噪声, Z域全相位模型, 相位噪声方差

Abstract: A carrier tracking loop with series-connection structure is proposed to solve the tracking problem of carrier signal.The loop's universal phase model is established in Z domain to analyze its tracking performance in the case of AGWN(Additive Gauss White Noise) input,and a general formula is derived for calculating variance of phase tracking noise.The theory analysis results are verified via a specific instance of new loop.Based on the above analysis results,the loop's optimization and the comparison between the traditional and the proposed loop are done,which shows that the proposed is superior to the traditional loop under the condition of high dynamic and very low CNR (Carrier to Noise Ratio).The conclusion can be used to evaluate the receiver's tracking performance or design loop.

Key words: carrier tracking, series-connection carrier tracking loop, AGWN, phase model in Z domain, variance of phase noise

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