| GPS软件接收机精确载波频率捕获算法分析与实现 |
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| 引用本文： | 刘宁,刘雪瑞.GPS软件接收机精确载波频率捕获算法分析与实现[J].全球定位系统,2011,36(2):36-39. |
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| 作者姓名： | 刘宁 刘雪瑞 |
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| 作者单位： | 61365部队; |
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| 摘 要： | 采用基于快速傅里叶变换（FFT）的并行码相位搜索捕获算法实现GPS信号的捕获，根据相位关系对载波频率进行精化，使其满足跟踪模块的需求。在分析算法的基础上，通过对模拟信号和实测数据进行捕获实验，实现了对载波频率的精化，获得精确频率可直接用于后续跟踪环路。
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| 关 键 词： | FFT 并行 载波频率 相位 |
Research and Realization of Acquisition Algorithm with Fine Carrier Frequency Estimation of GPS Software Receiver |
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| LIU Ning,LIU Xue-rui.Research and Realization of Acquisition Algorithm with Fine Carrier Frequency Estimation of GPS Software Receiver[J].Gnss World of China,2011,36(2):36-39. |
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| Authors: | LIU Ning LIU Xue-rui |
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| Institution: | 61365,部队,天津,300142 |
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| Abstract: | The acquisition module is an important part of GPS software receiver.The parallel search and acquisition strategy of code-phase on the basis of FFT is utilized to implement GPS signals acquisition.In order to improve the frequency resolution to meet the need of the tracking loop,the fine estimation through a phase relationship is then achieved.Experiments using real and simulated IF data is showed,and the frequency resolution is improved dramatically,which can be directly used for the tracking loop. |
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| Keywords: | FFT parallel carrier frequency phase |
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