| 北斗卫星导航系统和GPS兼容性评估(英文) |
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| 引用本文： | 刘莉,战兴群,刘卫,牛满仓.北斗卫星导航系统和GPS兼容性评估(英文)[J].测绘学报,2011(Z1). |
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| 作者姓名： | 刘莉 战兴群 刘卫 牛满仓 |
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| 作者单位： | 上海交通大学航空航天学院; |
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| 基金项目： | 国家863计划(2009AA12Z322); 中国空间技术研究院创新基金(2010) |
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| 摘 要： | 北斗卫星导航系统的信号体制与GPS近似且占用相同的频段,不可避免地带来兼容性问题。从理论上分析兼容性评估的重要参数:频谱分离系数、码跟踪谱灵敏度和等效载噪比衰减,阐述伪随机码码长、导航数据速率和码片速率对兼容性计算的影响,在综合考虑信号兼容评估的运算速度和准确性的基础上,提出改进的GNSS兼容性评估模型。以此兼容性评估模型对北斗卫星导航系统和GPS所有频段进行仿真,仿真分析中考虑北斗卫星导航系统和GPS的具体频率分配、信号体制、发射功率、发射带宽、卫星天线增益、仰角、多普勒偏移、信号在空间传播的衰耗以及接收机参数。通过仿真可以看出,当北斗卫星导航系统满星座运行时,GPS对北斗系统的干扰将大于北斗系统对GPS的干扰。
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| 关 键 词： | 兼容性 频谱分离系数 等效载噪比衰减 北斗卫星导航系统 GPS |
Assessment of Radio Frequency Compatibility between Compass and GPS |
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| LIU Li,ZHAN Xingqun,LIU Wei,NIU Mancang School of Aeronautics , Astronautics,Shanghai Jiao Tong University,Shanghai ,China.Assessment of Radio Frequency Compatibility between Compass and GPS[J].Acta Geodaetica et Cartographica Sinica,2011(Z1). |
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| Authors: | LIU Li ZHAN Xingqun LIU Wei NIU Mancang School of Aeronautics Astronautics Shanghai Jiao Tong University Shanghai China |
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| Institution: | LIU Li,ZHAN Xingqun,LIU Wei,NIU Mancang School of Aeronautics and Astronautics,Shanghai Jiao Tong University,Shanghai 200240,China |
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| Abstract: | Since Compass's signal structures are similar to and its frequencies are close to GPS,it certainly causes the interference problem.This paper analyzes the important parameters for compatibility which are spectral separation coefficient,code tracking spectral sensitivity coefficient,and effective carrier-power-to-noise density ratio.Meanwhile,the effect of code length,code-chip rate and navigation data rate onto compatibility computation is assessed.Then,a modified compatibility assessment model with good ba... |
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| Keywords: | compatibility spectral separation coefficient degradation of effective carrier-power-to-noise density ratio Compass GPS |
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