| 一种基于窄相关的BOC信号的多径减弱方法 |
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| 引用本文： | 刘禹圻,胡修林,冉一航,柯颋.一种基于窄相关的BOC信号的多径减弱方法[J].宇航学报,2010,31(10). |
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| 作者姓名： | 刘禹圻 胡修林 冉一航 柯颋 |
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| 作者单位： | 华中科技大学电子与信息工程系,武汉,430074 |
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| 摘 要： | 针对卫星导航接收机性能易受多径信号的影响,提出了一种基于窄相关的BOC信号的多径减弱方法。该方法通过调整本地伪码相位使码跟踪环路和载波跟踪环路工作在受多径影响小的自相关函数副峰上,有效地减小了多径信号对环路的影响,性能优于传统的窄相关技术,且几乎不增加设备的复杂度和计算量。通过对BOC(1,1)和BOC(10,5)的仿真分析表明:该方法能有效减小多径引起的误差,对延迟大于0.5个码片的多径信号能起到完全抑制的效果。最后本文还对该方法在低信噪比下的应用给出了建议。
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| 关 键 词： | 全球定位系统 多径 载波跟踪环 延迟锁相环 二进制载波偏移 |
A Multipath Mitigation Method for BOC Modulated Signal Based on Narrow Correlator |
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| LIU Yu-qi,HU Xiu-lin,RAN Yi-hang,KE Ting.A Multipath Mitigation Method for BOC Modulated Signal Based on Narrow Correlator[J].Journal of Astronautics,2010,31(10). |
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| Authors: | LIU Yu-qi HU Xiu-lin RAN Yi-hang KE Ting |
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| Institution: | LIU Yu-qi,HU Xiu-lin,RAN Yi-hang,KE Ting ( Department of Electronics and Information Technology,Huazhong University of Science and Technology,Wuhan 430074,China) |
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| Abstract: | Focusing on the problem that the performance of a GNSS receiver is susceptive to the multipath signals,a multipath mitigation method based on the narrow correlator technique for BOC modulated signal is presented in this paper. By switching the local phase of early,late,and prompt pseudo-random noise codes,the code tracking loop and the carrier tracking loop can work on the side peak of the autocorrelation function. Its performance is better than the traditional narrow correlator technique. Compared with mos... |
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| Keywords: | Global positioning system Multipath propagation Phase locked loops Delay lock loops Binary offset carrier ( BOC) |
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