| 卫星遥测功率谱分析和调制度测量方法研究 |
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| 引用本文： | 权爽.卫星遥测功率谱分析和调制度测量方法研究[J].航天器工程,2008,17(3):71-77. |
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| 作者姓名： | 权爽 |
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| 作者单位： | 北京空间飞行器总体设计部,北京,100094 |
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| 摘 要： | 残余载波调制是卫星测控中的常用调制体制。文章从理论上给出了该体制下信号的功率谱密度表达式，得到奇次谐波谱线展宽等结论，并通过仿真和实验进行了验证。利用所得结论讨论了遥测调制度测量方法，提出通过功率谱的2阶边带进行测量可以使结果得到改善。
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| 关 键 词： | 残余载波调制体制 功率谱 基带信号 遥测调制度 |
| 文章编号： | 1673-8748(2008)03-0071-07 |
| 修稿时间： | 2007年11月22 |
An Analysis of Satellite Telemetry Power Spectrum and Research on Measurement of Modulation Index |
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| QUAN Shuang.An Analysis of Satellite Telemetry Power Spectrum and Research on Measurement of Modulation Index[J].Spacecraft Engineering,2008,17(3):71-77. |
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| Authors: | QUAN Shuang |
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| Institution: | QUAN Shuang (Beijing Institute of Spacecraft System Engineering,Beijing 100094, China) |
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| Abstract: | Residual carrier modulation is commonly used in satellite TT＆C system. In this paper, the expression of power spectrum of modulated signal is derived theoretically,and conclusions including spectrum spread of odd order harmonics are demonstrated by simulations and experiments. The measurement of telemetry modulation index is discussed, and a new method using 2^nd order sideband is proposed to improve measurement results. |
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| Keywords: | residual carrier modulation power spectrum baseband signal telemetry modulation index |
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