| 卫星通信系统调制方式的研究 |
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| 引用本文： | 叶丽艳,吕新宇.卫星通信系统调制方式的研究[J].电信快报,1997(6):3-5,28. |
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| 作者姓名： | 叶丽艳 吕新宇 |
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| 作者单位： | Ye Liyan，Lü Xinyu，and Wu Zhongyi |
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| 摘 要： | 本文从卫星通信的特性出发 ,针对其带限和非线性的信道特性 ,提出了各种PSK调制方式 ,这类调制方式是利用已调信号包络恒定、频谱占有率低以及经由非线性信道而产生的频谱扩展和频率失真小等特点 ,使卫星通信的已调信号和特殊信道达到良好的匹配。本文还对相干载波提取中的锁相环提出了一种改进方法。
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| 关 键 词： | 卫星通信 调制 锁相环 |
Research on Modulation Systems for Satellite Communication |
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| Abstract: | Considering the characteristics of the channel in satellite communication and the channel features of band limiting and non linearity, this paper presents some PSK modulating modes. Owing to the constant envelop, and low spectrum occupancy of modulated signal ,and small spectrum spreading and frequency distortion after the signal passed the nonlinear channel, this kind of modulating modes can fulfill preferable match of the modulated signal and the special channel in satellite communication.It also give an improved method for PLL(phase locked loop) to extract coherent carrier. |
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| Keywords: | satellite communication modulation PLL |
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