[1]祝雪芬,陈熙源,涂刚毅,等.伽利略E1-BOC信号的改进捕获算法及性能分析[J].东南大学学报(自然科学版),2009,39(5):941-945.[doi:10.3969/j.issn.1001-0505.2009.05.015]
 Zhu Xuefen,Chen Xiyuan,Tu Gangyi,et al.Improved acquisition algorithm and performance analysis for Galileo E1-BOC signal[J].Journal of Southeast University (Natural Science Edition),2009,39(5):941-945.[doi:10.3969/j.issn.1001-0505.2009.05.015]
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伽利略E1-BOC信号的改进捕获算法及性能分析()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
39
期数:
2009年第5期
页码:
941-945
栏目:
测绘与导航
出版日期:
2009-09-20

文章信息/Info

Title:
Improved acquisition algorithm and performance analysis for Galileo E1-BOC signal
作者:
祝雪芬 陈熙源 涂刚毅 李滋刚
东南大学仪器科学与工程学院, 南京 210096
Author(s):
Zhu Xuefen Chen Xiyuan Tu Gangyi Li Zigang
School of Instrument Science and Engineering, Southeast University, Nanjing 210096,China
关键词:
伽利略E1-BOC 高灵敏度 能量捕获 性能分析
Keywords:
Galileo E1-BOC high-sensitivity energy-based acquisition performance analysis
分类号:
P228.4
DOI:
10.3969/j.issn.1001-0505.2009.05.015
摘要:
在时域并行FFT捕获算法的基础上,采用在频率搜索维上基于能量搜索的策略对伽利略E1-Boc信号的捕获进行了仿真和实验分析.在伽利略仿真信号的码延迟时间为1.8 ms,多普勒频移为600 Hz,导航电文调制速率为250 bit/s,数值为±1的情况下分别从捕获率、ROC操作特性曲线以及计算复杂性3方面对能量捕获算法性能进行了验证,并与AV, Zero-Padding两种算法进行了比较.结果表明,能量捕获算法在载噪比为32 dB/Hz的室内微弱信号环境下,捕获率能达到90%,且ROC操作特性曲线和计算复杂性等综合性能均优于AV,Zero-Padding两种算法,适用于数据跳变发生频繁的微弱伽利略E1-BOC信号的捕获.
Abstract:
An energy-based acquisition method, with some modifications on frequency search space based on the time domain fast Fourier transform(FFT)parallel acquisition method, is proposed for Galileo E1-BOC signal. Performance analysis for this new acquisition algorithm is validated by simulation on Galileo E1 signals from the points of detection probability, ROC(receiver operating characteristic)operation characters curve and computational complexity. The simulation parameters are chosen like these: code delay time is equal to 1.8 ms, Doppler frequency shift is equal to 600 Hz, navigation data rate is equal to 250 bit/s and its value is ±1. The result shows that this improved acquisition algorithm has a superior performance to the other two acquisition techniques(AV and Zero-Padding algorithms), with a high detection probability of 90% in indoor environment where the carrier to noise ratio is 32 dB/Hz. The energy-based acquisition method is suitable for the weak Galileo E1-BOC signals acquisition where the data transition happens frequently.

参考文献/References:

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备注/Memo

备注/Memo:
作者简介: 祝雪芬(1983—),女,博士生; 陈煕源(联系人),男,博士,教授,博士生导师,chxiyuan@seu.edu.cn.
基金项目: 教育部新世纪优秀人才计划资助项目(NCET-06-0462)、国家重点基础研究发展计划(973计划)资助项目(2009CB724002)、江苏省六大人才高峰资助项目(2008143).
引文格式: 祝雪芬,陈熙源,涂刚毅,等.伽利略E1-BOC信号的改进捕获算法及性能分析[J].东南大学学报:自然科学版,2009,39(5):941-945. [doi:10.3969/j.issn.1001-0505.2009.05.015]
更新日期/Last Update: 2009-09-20