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全球定位系统

一种用于BDS-3接收机工程实现的两级B1C信号捕获技术

颜舒琳 丁超

颜舒琳, 丁超. 一种用于BDS-3接收机工程实现的两级B1C信号捕获技术[J]. 全球定位系统, 2019, 44(1): 1-9. doi: DOI:10.13442/j.gnss.1008-9268.2019.01.001
引用本文: 颜舒琳, 丁超. 一种用于BDS-3接收机工程实现的两级B1C信号捕获技术[J]. 全球定位系统, 2019, 44(1): 1-9. doi: DOI:10.13442/j.gnss.1008-9268.2019.01.001
YAN Shulin, DING Chao. A novel engineering implementation technique for acquiring B1C signal in the BeiDou-3 receiver[J]. GNSS World of China, 2019, 44(1): 1-9. doi: DOI:10.13442/j.gnss.1008-9268.2019.01.001
Citation: YAN Shulin, DING Chao. A novel engineering implementation technique for acquiring B1C signal in the BeiDou-3 receiver[J]. GNSS World of China, 2019, 44(1): 1-9. doi: DOI:10.13442/j.gnss.1008-9268.2019.01.001

一种用于BDS-3接收机工程实现的两级B1C信号捕获技术

doi: DOI:10.13442/j.gnss.1008-9268.2019.01.001
详细信息
    作者简介:

    颜舒琳 (1987—),女,高级工程师,2014年毕业于英国帝国理工大学计算机系获博士学位,主要从事卫星导航接收机的基带信号处理的算法及模型设计工作,包括北斗抗欺骗式干扰技术、矢量跟踪技术、北斗三号卫星导航接收机基带信号处理技术等.

    通讯作者:

    颜舒琳 E-mail:shuliyan09@163.com

A novel engineering implementation technique for acquiring B1C signal in the BeiDou-3 receiver

  • 摘要: 北斗三号卫星导航系统(BDS-3)B1C信号相较北斗二号卫星导航系统卫星信号,从信号结构、编码方式再到导航电文结构都发生了改变,包括引入导频信号、二次编码、BOC调制、LDPC编码和B-CNAV1导航电文结构等.这些改变一方面提高了信号性能(如抗多路径、信号捕获和跟踪精度等);另一方面,也带来了一系列问题,对接收机的信号捕获技术提出了全新的要求,如需处理更大的数据流,解决由二次编码带来的符号翻转和BOC调制造成的捕获多峰性问题.针对BDS-3接收机的工程实现,本文提出了一种新颖有效的两级B1C信号捕获技术.其中第一阶段采用扩展并行平均相关搜获结构,用以解决符号翻转问题,同时实现高效的信号粗捕获;第二阶段在缩小的搜索范围内进行高精度搜索,此步骤可有效避免信号多峰性造成的误锁可能.除此之外,本文还介绍了单信道和多信道组合式捕获技术,用户可根据资源占用和捕获灵敏度需求选取更有效的捕获方法.实验结果表明,本文提出的方法允许使用更小更经济的快速傅里叶变换(FFT)模块,并通过大量并行处理的方法实现快速捕获.相较传统的高精度捕获技术,此方法在采样频率超过50 MHz时,能够在保证相近的捕获精度的同时减少至少61%的运算量.

     

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  • 刊出日期:  2019-02-15

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