| A/D转换信噪比分析及在小卫星终端中的应用 |
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| 引用本文： | 余超,段登平,王建宇,李国通.A/D转换信噪比分析及在小卫星终端中的应用[J].空间科学学报,2004,24(5):382-387. |
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| 作者姓名： | 余超 段登平 王建宇 李国通 |
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| 作者单位： | 1. 中国科学院上海技术物理研究所,上海,200083
2. 上海微小卫星工程中心 |
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| 基金项目： | 中国科学院特别支持重大项目资助(KGCX1-Y-03) |
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| 摘 要： | 针对一种宽带高中频接收方案，详细分析了地面反弹等因素对ADC信噪比的影响，给出了相应结果．最后从应用出发，根据小卫星接收终端对数据采集的要求，对所需的采样率等指标进行了分析和计算．
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| 关 键 词： | 模数转换 数字接收机 小卫星 信噪比 采样速率 |
| 修稿时间： | 2003年10月23 |
A/D CONVERTERS' SIGNAL-TO-NOISE RATIO ANALYSIS AND IT'S APPLICATION IN MOONLET TERMINALS |
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| YU Chao DUAN Dengping WANG Jianyu.A/D CONVERTERS'''' SIGNAL-TO-NOISE RATIO ANALYSIS AND IT''''S APPLICATION IN MOONLET TERMINALS[J].Chinese Journal of Space Science,2004,24(5):382-387. |
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| Authors: | YU Chao DUAN Dengping WANG Jianyu |
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| Abstract: | The traditional moonlet narrowband receiver's signal bandwidth is narrow, so a low sampling rate is needed and many commercial ADC products may meet this requirement. In this paper, a broadband high intermediate frequency (IF) receiving scheme is proposed for moonlet radio terminal receivers. In this scheme, intermediate frequency is designed at 70MHz, and signal bandwidth is 20MHz. Analog-to-Digital Converters (ADC) play an important role in digital communication or moonlet receivers. The sampling rate and conversion bits are the main index for ADC's characteristics.
According to the requirements mentioned above, the factors which may affect ADC's Signal-to-Noise Ratio (SNR) characteristics are analyzed in detail, and the corresponding calculated results, such as sampling rate and conversion bits are given. In the end, the relations among the ADC's SNR, sampling rate and conversion bits are discussed. |
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| Keywords: | Analog-to-digital converters Digital receivers Moonlet |
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