| 引用本文: | 李彩华,刘瀛翔,牟卫华,等.星上高功率放大器对导航信号载波跟踪性能的影响分析.[J].国防科技大学学报,2013,35(2):81-86.[点击复制] |
| LI Caihua,LIU Yingxiang,MO Weihua,et al.Analysis of the impact of satellite’s high power amplifier on the performance of navigation signals carrier tracking[J].Journal of National University of Defense Technology,2013,35(2):81-86[点击复制] |
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| 星上高功率放大器对导航信号载波跟踪性能的影响分析 |
| 李彩华, 刘瀛翔, 牟卫华, 欧 钢 |
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(国防科技大学 电子科学与工程学院，湖南 长沙 410073)
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| 摘要: |
| 由于滤波器带宽的限制和高功率放大器(HPA)的非线性效应，使恒包络导航信号产生失真，这将引起导航信号载波跟踪时锁相环(PLL)跟踪性能的恶化。针对这个问题，建立了星上高功率放大器非线性失真的一般模型，并推导了HPA的非线性效应引起PLL跟踪抖动的表达式，然后仿真分析了不同信号体制、不同滤波器带宽和不同功率放大器模型下的PLL跟踪抖动性能。 |
| 关键词: 星上高功率放大器 恒包络 非线性失真 PLL跟踪抖动 |
| DOI： |
| 投稿日期：2012-06-01 |
| 基金项目:教育部新世纪人才支持计划（NCET-08-0144) |
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| Analysis of the impact of satellite’s high power amplifier on the performance of navigation signals carrier tracking |
| LI Caihua, LIU Yingxiang, MO Weihua, OU Gang |
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(College of Electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China)
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| Abstract: |
| Because of the limited bandwidth of filter and the high-power amplifier nonlinear
effect, there will be phase noise for the constant envelope signals, which will affect navigation signals in
the PLL tracking error of carrier tracking. To address this issue, the generic model for analyzing navigation
signals non-linear distortion was established, and the relation between high-power amplifier nonlinear
effect and performance of PLL tracking error were simulated and analyzed. |
| Keywords: satellite’s high power amplifier constant envelope non-linear distortion PLL
tracking error |
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