卫星导航系统功率增强对接收信号质量的影响分析

Chinese Journal of Space Science(2013)

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Abstract
GPS现代化计划在L1和L2两个频点上增加具有点波束增强功能的M码导航信号.以GPS L1 M码信号为例,从频谱重叠、接收信号等效载噪比两方面分析GPS L1 M码信号功率增强对其他导航信号质量的影响.分析结果表明,GPS L1 M码信号增强幅度在20 dB以内时,可以明显提升增强信号的抗干扰性能,引起其他信号等效载噪比恶化量小于2 dB;信号增强幅度超过20 dB后,将导致其他信号质量迅速下降,功率增强信号等效载噪比达到某一极值后将不再增加.
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Key words
Anti-jamming,GPS,Power enhancement,Navigation
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