基于重构子互相关的BOC无模糊度跟踪方法  

An Unambiguous Tracking Method Based on Combination of Sub Cross-Correlation Functions for BOC Signals

作　　者：符强[1,2] 陈孝倩 纪元法 孙希延[1,2,3] 蔚保国 FU Qiang;CHEN Xiao-qian;JI Yuan-fa;SUN Xi-yan;WEI Bao-guo(Guangxi Key Laboratory of Precision Navigation Technology and Application, Guilin University of ElectronicTechnology, Guilin, Guangxi 541004, China;Satellite Navigation and Location Service National & Local Joint Engineering Research Center,Guilin, Guangxi 541004, China;Guangxi Experiment Center of Information Science, Guilin University of Electronic Technology, Guilin, Guangxi 541004, China;State Key Laboratory of Satellite Navigation System and Equipment Technology,Shijiazhuang, Hebei 050000,China)

机构地区：[1]桂林电子科技大学广西精密导航技术与应用重点实验室,广西桂林541004 [2]卫星导航定位与位置服务国家地方联合工程研究中心,广西桂林541004 [3]桂林电子科技大学广西信息科学实验中心,广西桂林541004 [4]卫星导航系统与装备技术国家重点实验室,河北石家庄050000

出　　处：《北京理工大学学报》2020年第11期1207-1215,共9页Transactions of Beijing Institute of Technology

基　　金：国家自然科学基金资助项目(61561016,61861008);广西科技厅项目(桂科AC16380014,桂科AA17202048,桂科AA17202033);四川科技计划项目(17ZDYF1495);桂林科技局项目(20160202,20170216);广西高校中青年教师基础能力提升项目(KY2016YB164);广西精密导航技术与应用重点实验室(DH201707);桂林电子科技大学研究生教育创新计划资助项目(2018YJCX19,2018YJCX31)。

摘　　要：针对BOC体制信号的自相关函数具有多峰性质导致BOC存在的模糊跟踪问题,提出了子互相关函数概念及基于重构子互相关函数的无模糊度跟踪方法.通过分析对比各子互相关函数,重构生成仅具有单一相关峰并保持BOC窄相关特性的相关函数.以BOC(1,1)和BOC(10,5)为例进行仿真与分析,模糊度有效性表明本文方法相比ASPeCT与BPSK-like能够更好地去除副峰且保持窄相关,鉴相曲线表明对于BOC(1,1)与BOC(10,5),本文方法相对BPSK-like的线性区域斜率增益分别为5.2 dB与7.2 dB,抗多径性能表明本文方法相比ASPeCT与BPSK-like的多径误差最小,抗噪声性能表明对于BOC(1,1)与BOC(10,5)本文方法相比BPSK-like的码跟踪误差标准差分别减少了0.046 Tc与0.030 Tc.Since the auto-correlation function of binary offset carrier(BOC)signal has multiple peaks,there is a false tracking problem in BOC signal.In order to solve this problem,a concept of sub cross-correlation function and an unambiguous tracking method based on combination of sub cross-correlation functions were proposed in this paper.By analyzing and comparing the sub-correlation functions,a correlation function with only a single correlation peak and the narrow correlation characteristics of BOC were created.Taking BOC(1,1)and BOC(10,5)as examples,simulation analysis was carried out.The results show the effectiveness of de-ambiguity.Compared with ASPeCT and BPSK-like,the proposed method can remove side peaks and maintain narrow correlation.The phase discrimination curve shows that,compared with BPSK-like for BOC(1,1)and BOC(10,5),the linear region slope gain of the proposed method is 5.2 dB and 7.2 dB,respectively.In the anti-multipath performance,compared to ASPeCT and BPSK-like,the multipath error of this method is least.In the anti-noise performance,compared with BPSK-like for BOC(1,1)and BOC(10,5)respectively,the code tracking error standard deviation of the method is reduced by 0.046 Tc and 0.030 Tc.

关 键 词：BOC信号 重构相关函数 子互相关函数 无模糊度跟踪 跟踪性能 

分 类 号：TN911.7[电子电信—通信与信息系统]