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一种改进的北斗卫星信号并行捕获方法
  • ISSN号：1000-1328
  • 期刊名称：《宇航学报》
  • 时间：0
  • 分类：TN967.1[电子电信—信号与信息处理;电子电信—信息与通信工程]
  • 作者机构：[1]中国科学院微电子研究所,北京100029
  • 相关基金：国家自然科学基金（61376027/61221004）
作者： 李健[1], 陈杰[1]
关键词： 北斗信号, 并行捕获, 判决方法, BDS signal, Parallel acquisition, Decision method
中文摘要：

为了提高全并行捕获方式下北斗卫星信号的发现概率,提出了一种改进的并行捕获算法。相对于传统的检测方法,该算法每次搜索需要存储少量的候选值,采用多次观测并统计候选值来完成信号检测。虽然增加了少量存储空间和运算,但是其利用了更多的观测信息,因此有利于提高弱信号下的发现概率。该方法不需要实时统计噪声分布,从而避免了噪声波动对于门限的影响。在高斯白噪声模型下给出了系统发现概率和虚警率的定量评估。理论分析和仿真结果表明该方法可以有效改善北斗弱信号的发现概率,相对于传统判决方法可以提高捕获灵敏度达3-4dB。

英文摘要：

A modified parallel acquisition method for improving detection probability of BDS（ Beidou Satellite Navigation System） signal is proposed in this paper. Relative to the traditional detection,little amount of candidate observations need to be stored during every search round. Signal detection can be achieved by means of repetitive observations and statistics of these values. In spite of less increase in memory and operation,this approach contributes to the improvement of weak signal detection probability due to the utilization of more observation information. The influence of noise fluctuation on threshold can be avoid without noise distribution analyzed in real time. System detection probability and false alarm probability are given based on the white Gaussian noise model. Analytical and simulation results demonstrate the effectiveness of this approach for BDS weak signal acquisition. As a result,this approach yields higher acquisition sensitivity up to 3 - 4dB compared with the traditional method.

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期刊信息
  • 《宇航学报》
  • 中国科技核心期刊
  • 主管单位:中国科学技术协会
  • 主办单位:中国宇航学会
  • 主编：杜善义
  • 地址：北京市海淀区阜成路8号主楼306
  • 邮编：100048
  • 邮箱：yhxb@vip.163.com
  • 电话：010-68768614 68767316
  • 国际标准刊号：ISSN：1000-1328
  • 国内统一刊号：ISSN：11-2053/V
  • 邮发代号:2-167
  • 获奖情况:
  • 2006、2011年百种中国杰出学术期刊,2007年中国科协精品科技期刊工程,2006-2008年中国科技期刊优秀学术论文奖,2011年《中国精品科技期刊》称号
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,荷兰文摘与引文数据库,美国工程索引,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:17670