| 基于盲判决反馈均衡的GPS信号多径干扰抑制方法 |
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| 引用本文： | 李春宇,张晓林. 基于盲判决反馈均衡的GPS信号多径干扰抑制方法[J]. 电子学报, 2011, 39(1): 46-52 |
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| 作者姓名： | 李春宇 张晓林 |
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| 作者单位： | 北京电子技术应用研究所;北京航空航天大学电子信息工程学院; |
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| 摘 要： | 给出了存在多径效应时的GPS接收信号模型,分析了多径干扰对GPS接收机跟踪环路的影响,将均衡技术应用于跟踪环路,提出了一种GPS信号多径干扰抑制方法.该方法在GPS信号跟踪环路中引入了判决反馈分数间隔均衡器,同时,根据GPS信号为BPSK调制且发送的伪码序列被导航电文调制后存在正负反转不确定性的特点,均衡器系数更新时选...
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| 关 键 词： | GPS接收机 跟踪环路 多径干扰 盲判决反馈均衡 修正常模算法 |
| 收稿时间： | 2009-10-27 |
Multipath Mitigation Method of GPS Signals Based on Blind Decision Feedback Equalization |
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| LI Chun-yu,ZHANG Xiao-lin. Multipath Mitigation Method of GPS Signals Based on Blind Decision Feedback Equalization[J]. Acta Electronica Sinica, 2011, 39(1): 46-52 |
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| Authors: | LI Chun-yu ZHANG Xiao-lin |
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| Affiliation: | LI Chun-yu1,ZHANG Xiao-lin2(1.Beijing Institute of Electronics Technology Application,Beijing 100091,China,2.School of Electronic Engineering,Beijing University of Aeronautics and Astronautics,Beijing 100191,China) |
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| Abstract: | The model of GPS signals is given in the multipath environment,and the multipath effects to tracking loop in GPS receiver are analyzed.A multipath mitigation method of GPS signals is proposed using equalization technology in tracking loop.In this method,fractionally spaced blind decision feedback equalization is applied.Meanwhile,because GPS signals are BPSK signals and the illegibility of C/A codes appears when C/A codes are modulated with navigation data,the coefficients of the equalization are updated wi... |
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| Keywords: | GPS receiver tracking loop multipath effects blind decision feedback equalization modified constant module algorithm |
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