| 一种改进的GPS信号捕获策略的性能分析 |
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| 引用本文： | 黄静,姚铮,陆明泉.一种改进的GPS信号捕获策略的性能分析[J].宇航学报,2011,32(1):157-161. |
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| 作者姓名： | 黄静 姚铮 陆明泉 |
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| 作者单位： | 1. 清华大学 电子工程系, 北京 100084; 2. 解放军电子工程学院, 合肥 230037 |
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| 基金项目： | 收稿日期：20100115; \ 修回日期：20100808 |
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| 摘 要： | 针对一种克服位翻转设计的GPS信号捕获策略缺乏理论评估，以及判决门限计算公式失配的问题，对该策略下的接收机捕获性能做了理论分析及定量评估，给出了虚警概率和检测概率的解析表达式，以及修正的判决门限计算公式。从理论上证明了这种策略在存在数据位翻转时的有效性，并指出当利用传统判决门限计算公式对该策略进行设计时，预期性能与实际捕获性能间存在较大偏差，而给出的修正计算公式可以得到与真实值吻合的分析结果。该结论对接收机研制有指导意义和实用价值。
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| 关 键 词： | 全球定位系统 捕获 虚警概率 检测概率 判决门限 |
| 收稿时间： | 2010-01-15 |
Performance Analysis of an Improved GPS Acquisition Strategy |
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| HUANG Jing,YAO Zheng,LU Ming-quan.Performance Analysis of an Improved GPS Acquisition Strategy[J].Journal of Astronautics,2011,32(1):157-161. |
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| Authors: | HUANG Jing YAO Zheng LU Ming-quan |
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| Institution: | HUANG Jing1,2,YAO Zheng1,LU Ming-quan1(1.Department of Electronic Engineering,Tsinghua University,Beijing 100084,China,2.PLA Electronic Engineering Institute,Hefei 230037,China) |
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| Abstract: | A GPS signal acquisition strategy designed for overcoming data bit flip lacks the theoretical appraisal,and the corresponding judging threshold calculation formula does not match.By strict mathematical derivation and simulation,the theoretical analysis and the quantitative evaluation of receiver acquisition performance under the strategy are investigated in this paper.The expressions of false-alarm probability and detection probability,and an improved compensational formula of judging threshold are derived.... |
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| Keywords: | GPS Acquisition False alarm(FA) probability Detection probability Judging threshold |
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