改进的TMBOC调制信号闸波相关鉴相方法  

Improved strobe correlation discrimination method for time-multiplex binary offset carrier modulated signal

作　　者：李文刚[1] 王屹伟 黄辰 LI Wengang;WANG Yiwei;HUANG Chen(School of Telecommunications Engineering,Xidian Univ.,Xi'an 710071,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071

出　　处：《西安电子科技大学学报》2018年第2期7-12,共6页Journal of Xidian University

基　　金：国家自然科学基金资助项目(61201136);高等学校学科创新引智计划资助项目(B08038)

摘　　要：为了实现卫星导航系统中时分二进制偏移载波调制信号的无模糊抗多径跟踪问题,提出一种基于闸波相关的改进鉴相方法.首先,将时分二进制偏移载波调制信号与偏移0.5个码片的W2形闸波和偏移0.5个码片的伪随机码分别进行相关;然后,将相关结果相乘,即可获得无模糊且对称性良好的码鉴相曲线.对所提方法得到的码鉴相曲线的性质进行了分析和实验仿真,结果证明:这种方法实现简单,且得到的鉴相曲线基本具有较好的中心对称性,具有较强的抗多径能力,能够实现无模糊跟踪.所提方法相对于已有的闸波相关方法更加适合于时分二进制偏移载波调制信号的鉴相.In order to solve the problem of ambiguous tracking and multipath mitigation of new signal time-multiplexed binary offset carrier modulated signal in the global navigation satellite system,this paper proposes an improved strobe correlation method which calculates the correlation of the received TMBOC signal with the W2 strobe waveform in 0.5 code offset and the pseudo-random code code in 0.5 code offset,respectively,and then the two correlations arc multiplied.In this way an unambiguous and good symmetrical code discrimination curve is obtained.The characteristics of the obtained code discrimination curve by the proposed method is analyzed and simulated,and the result shows:the proposed method is easy to realize,and the obtained code discrimination curve has good central symmetry,strong multipath mitigation capability and can be used for an unambiguous tracking,so it is more suitable for the TMBOC signal discrimination compared with the existing strobe correlation methods and improved methods.

关 键 词：卫星导航系统 时分二进制偏移载波调制 闸波相关 抗多径 无模糊跟踪 

分 类 号：TN967.1[电子电信—信号与信息处理]