| 基于载波表的GPS载波跟踪环路研究 |
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| 引用本文： | 邓江平,张雷,舒嵘,王建宇.基于载波表的GPS载波跟踪环路研究[J].微计算机信息,2010(7). |
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| 作者姓名： | 邓江平 张雷 舒嵘 王建宇 |
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| 作者单位： | 中国科学院上海技术物理研究所; |
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| 基金项目： | 基金申请人:舒嵘,张雷;项目名称:伪卫星技术的国际引进及其一体化定位的技术开发;基金颁发部门:上海市国际科技合作基金项目(075907042) |
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| 摘 要： | 实时GPS软件接收机可以使用查找表的方法得到本地复现载波以减少运算量。载波表是由一组具有一定频率间隔和固定初始相位的正弦和余弦信号组成。传统的载波跟踪环路无法使用具有离散频率和不连续相位的复现载波完成GPS载波跟踪。针对这一问题,使用相位补偿算法对载波进行相位补偿,设计了基于载波表的载波跟踪环路。仿真结果表明该载波跟踪环路能有效实现GPS信号的载波跟踪,且与传统的载波跟踪环路相比仅有微小的信噪比损失和频率跟踪精度衰减,可用于实时GPS软件接收机设计。
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| 关 键 词： | 实时 GPS软件接收机 相位补偿 载波跟踪 |
Study of GPS Carrier Tracking Loop Based on Carrier Table |
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| DENG Jiang-ping ZHANG Lei SHU Rong WANG Jian-yu.Study of GPS Carrier Tracking Loop Based on Carrier Table[J].Control & Automation,2010(7). |
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| Authors: | DENG Jiang-ping ZHANG Lei SHU Rong WANG Jian-yu |
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| Affiliation: | DENG Jiang-ping ZHANG Lei SHU Rong WANG Jian-yu(Shanghai Institute of Technical Physics,Chinese Academy of Sciences,200083,China) |
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| Abstract: | Real-time GPS software receivers generate local replica carrier by a look up table(LUT) method.The carrier table is consists of a serial of sine and cosine signals which are generated with a grid of frequency and a fixed initial phase.The traditional carrier lock loops can not work when the local replica carrier does not have precious frequency control and continuous phase.To solve the problem,a phase compensation algorithm is used to compensate the carrier phase,and the carrier lock loop with a carrier tab... |
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| Keywords: | Real-time Software GPS receiver Phase compensation Carrier tracking |
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