跨频点辅助北斗B2b载波相位跟踪性能研究  

Research on the performance of cross⁃frequency Dopper⁃aided BDS B2b carrier phase tracking

作　　者：刘通 张爽娜[1] 王盾[1] 巴晓晖 陈耀辉[1] 董启甲[1] LIU Tong;ZHANG Shuangna;WANG Dun;BA Xiaohui;CHEN Yaohui;DONG Qijia(Department of Navigation,Space Star Technology Co.,Ltd.,Beijing 100095,China;School of Electronic Information Engineering,Beijing Jiaotong University,Beijing 100091,China)

机构地区：[1]航天恒星科技有限公司导航事业部,北京100095 [2]北京交通大学电子信息工程学院,北京100091

出　　处：《电子设计工程》2023年第11期167-172,共6页Electronic Design Engineering

摘　　要：北斗卫星导航系统(BeiDou Navigation Satellite System,BDS)B2b信号电文播发速率高,载波相位跟踪性能下降。为了提高B2b信号载波相位跟踪性能,进而改善B2b信号的数据解调性能,该文采用跨频点导频信号辅助跟踪B2b信号的方法,使用实际观测的北斗三代卫星信号,分析和验证跨频点辅助B2b信号载波相位的跟踪性能。为测试信号跟踪门限,提出了一种在实测信号中插入高斯白噪声以调整信号载噪比的方法。实验结果表明,在B1C导频信号辅助下,B2b信号载波相位跟踪精度得到改善,跟踪门限降低约4 dB。The increase of the data transmission rate of BeiDou Navigation Satellite System B2b signal results in degraded carrier phase tracking performance.In order to improve the carrier phase tracking performance and the data demodulation performance of B2b signal,this paper adopts the method of cross⁃frequency pilot signal to aid the tracking of B2b signal,and use the actual observed BDS-3 satellite signal to analyze and verify the tracking performance of the cross⁃frequency aided B2b signal carrier phase.In order to test the signal tracking threshold,a method to inject Gaussian white noise into the measured signal to adjust carrier⁃to⁃noise ratio is proposed.Experimental results show that with the assistance of B1C pilot signal,the carrier phase tracking accuracy of B2b signal is improved,and the tracking threshold can be reduced by about 4 dB.

关 键 词：B2b信号 跨频点辅助跟踪 跟踪精度 跟踪门限 

分 类 号：TN961[电子电信—信号与信息处理]