BDS QMBOC信号的捕获方法研究  

Research on Acquisition Method Based on BDS QMBOC Signal

作　　者：冯永新[1] 王淼 FENG Yongxin;WANG Miao(Shenyang Ligong University,Shenyang 110159,China)

机构地区：[1]沈阳理工大学信息科学与工程学院,沈阳110159

出　　处：《沈阳理工大学学报》2021年第5期1-5,11,共6页Journal of Shenyang Ligong University

基　　金：国家自然科学基金资助项目(61971291)。

摘　　要：为解决正交复用二进制偏移载波(QMBOC(6,1,4/33))调制信号在捕获过程中因二进制偏移载波(BOC)调制信号自身带来的相关多峰特性造成的信号同步模糊问题,针对现实同步精度有限的情况,提出一种偶数阶副峰消除技术(ESET)来实现QMBOC信号的非匹配无模糊捕获。ESET算法引入调制序列构造本地BOC信号,同时借鉴信号与伪码的互相关特性。将该算法与现已成熟的捕获方法进行捕获仿真对比分析,并在噪声存在的条件下分析各算法对环境的适应能力。理论分析与仿真结果表明,ESET算法几乎消除了QMBOC信号捕获模糊问题,且显著提高了主峰峰值,具有很好的环境适应能力。In order to solve the synchronization ambiguity problem of Quadrature Multiplexed Binary Offset Carrier(QMBOC(6,1,4/33))signal caused by the multi-peak characteristic of correlation function brought by Binary Offset Carrier(BOC)signal in the acquisition process,an Even-order Side-peak Elimination Technique(ESET)is proposed to realize the non-matching and unambiguous acquisition of QMBOC signal.The modulation sequences are introduced by ESET algorithm to construct the local BOC signal,and the cross-correlation characteristic of the signal and the pseudo-code is used for reference.The algorithm is compared with the existing mature algorithms,and the adaptability of each algorithm to the environment is analyzed under the condition of noise.The theoretical and simulation analyses show that the QMBOC signal acquisition ambiguity problem is almost eliminated by the ESET algorithm,and the value of the main peak is significantly improved.Meanwhile,the ESET algorithm has good environmental adaptability.

关 键 词：正交复用二进制偏移载波调制信号 非匹配无模糊捕获 调制序列 互相关特性 

分 类 号：TN967.1[电子电信—信号与信息处理]