| 现代化的GPS军用M码综述 |
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| 引用本文： | 王华,常江.现代化的GPS军用M码综述[J].现代防御技术,2011,39(1):68-73,91. |
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| 作者姓名： | 王华 常江 |
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| 作者单位： | 1. 西安测绘研究所,陕西西安,710054;中国人民解放军理工大学,通信工程学院,江苏南京,210007
2. 中国人民解放军理工大学,通信工程学院,江苏南京,210007 |
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| 摘 要： | M码是现代化的GPS军用码,是美国"导航战"的重要内容。从M码信号的设计要求出发,介绍了M码信号的调制原理及其功率谱和自相关特性;然后根据相关损失、均方根带宽、频谱隔离系数和等效矩形带宽等参数对M码、C/A码和P(Y)码性能进行了分析比较;最后总结了M码的几种捕获和跟踪方案,并对其各自的优缺点进行了分析。
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| 关 键 词： | 全球定位系统 M码 二进制偏移载波调制 捕获 跟踪 |
Overview of Military M Code for Modern GPS |
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| WANG Hua,CHANG Jiang.Overview of Military M Code for Modern GPS[J].Modern Defence Technology,2011,39(1):68-73,91. |
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| Authors: | WANG Hua CHANG Jiang |
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| Institution: | WANG Hua1,2,CHANG Jiang2 (1.Xi'an Research Institute of Surveying and Mapping,Shaanxi Xi'an 710054,China,2.PLA,Science and Technology University,Communications Engineering Institute,Jiangsu Nanjing 210007 China) |
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| Abstract: | M code is a modern GPS military code as an important part of navigation war.Based on the M code's design requirement,M code signal's modulation theory and the characteristics of power spectrum and autocorrelation are introduced.Then the performances of M code,C/A code and P(Y) code are analyzed and compared according to several parameters such as correlation loss,RMS bandwidth,spectral separation coefficient,equivalent rectangular bandwidth and so on.Finally,a few acquisition and tracking schemes of M code ... |
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| Keywords: | GPS M code BOC modulation acquisition tracking |
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