| 基于QBOC码的BOC信号码跟踪环路的性能分析 |
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| 引用本文： | 刘瀛翔,唐小妹,王飞雪.基于QBOC码的BOC信号码跟踪环路的性能分析[J].全球定位系统,2009,34(4):20-24,32. |
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| 作者姓名： | 刘瀛翔 唐小妹 王飞雪 |
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| 作者单位： | 国防科学技术大学电子科学与工程学院卫星导航研发中心,湖南长沙410073 |
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| 摘 要： | 在Galileo系统建设和GPS现代化的进程中，为实现与BPSK（Bi-phase Shift Keying）的频谱分离，采用了BOC（Binary Offset Carrier）调制。BOC调制在码跟踪精度、多径抑制等方面比BPSK调制具有更好的性能，但其自相关函数的多相关峰特性使得在测距中可能产生偏差，因此，消除相关峰的模糊度是BOC信号接收中非常关键的问题。介绍了一种基于QBOC码的BOC信号码跟踪环路（“BOC十QBOC-BOC”），并推导出该环路码跟踪性能的解析表达式，最后的仿真结果验证了理论推导的正确性，可为BOC信号接收机的设计提供参考。
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| 关 键 词： | 卫星导航 码跟踪性能 BOC调制 QBOC码 延迟锁定环 GPS现代化 Galileo |
Analysis for Performance of Code Tracking Loop for BOC Signals Using QBOC Code |
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| LIU Ying-xiang,TANG Xiao-mei,WANG Fei-xue.Analysis for Performance of Code Tracking Loop for BOC Signals Using QBOC Code[J].Gnss World of China,2009,34(4):20-24,32. |
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| Authors: | LIU Ying-xiang TANG Xiao-mei WANG Fei-xue |
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| Institution: | LIU Ying-xiang,TANG Xiao-mei,WANG Fei-xue (Satellite Navigation Research and Development Center,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | In the implementation of Galileo and GPS modernization,binary offset carrier(BOC) modulation has been selected to obtain a higher spectral separation from the bi-phase shift keying(BPSK) signals.The BOC modulation has better performance than BPSK modulation in many aspects,such as code tracking performance and multipath mitigation.However,its multi-peak autocorrelation function can possibly result in biased measurements.Therefore,it is quite critical to remove the ambiguity of correlation peaks while receiv... |
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| Keywords: | Galileo |
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