| 多路导航信号恒包络处理技术 |
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| 作者姓名： | 赵雯雯 王岗 |
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| 作者单位： | 中国空间技术研究院西安分院,西安710000 |
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| 摘 要： | 现代化的导航系统需要在一个频段发射多路导航信号以提高频谱利用率。直接组合的复合信号不是恒包络,在通过饱和状态功率放大器时会产生AM/PM失真,从而影响整个导航系统的定位精度。为了解决这个问题,需要增加互调分量,把信号处理成恒包络复合信号。文章在分析GPS和GALILEO系统导航信号恒包络处理方法的基础上,给出了我国导航卫星系统恒包络处理方法的建议。
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| 关 键 词： | 恒包络 多路信号处理 互调分量 |
Constant Envelope Modulation for Multiple Navigation Signals |
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| Authors: | Zhao Wenwen Wang Gang |
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| Institution: | Zhao Wenwen Wang Gang(China Academy of Space Technology(Xi′an),Xi′an 710000,China) |
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| Abstract: | Modern navigation systems have to broadcast multiple signals on a limited bandwidth to improve bandwidth efficiency.However,the direct combination of the signals is not a constant envelope modulation.When this composite signal passes the satellite′s high-power amplifier,undesired Amplitude-Modulation to Phase-Modulation（AM/PM） distortions will be introduced,as a result,the precision of the navigation systems will fall.To solve the problem,intermodulation（IM） terms are exploited in order to obtain a constant envelope.This paper introduces the methods which GPS and GALILEO systems use to obtain a constant envelope,then gives advices on modulating COMPASS navigation signals. |
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| Keywords: | Constant envelope Multiple signals modulation Intermodulation terms |
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