| 基于数字调制的高速数传发射机技术研究 |
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| 引用本文： | 韩 威,田瑞甫,陆卫强.基于数字调制的高速数传发射机技术研究[J].通信技术,2014(5):544-548. |
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| 作者姓名： | 韩 威 田瑞甫 陆卫强 |
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| 作者单位： | 上海航天电子技术研究所,上海201109 |
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| 摘 要： | 针对现有卫星对地数传系统传输速率低、调制模式单一和无法在轨重配置等问题，运用了现代数字信号处理技术和先进数字元器件，提出了一种基于数字调制的高速数传发射机方案。简要介绍了系统结构、基本原理和核心器件，重点分析了方案中的高增益、低复杂度的信道编码技术、基于并行查表的数字成型技术和基带数字预失真技术，并给出了相应的技术方案，为下一代数字化卫星数据传输系统的实现奠定基础。
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| 关 键 词： | 卫星数据传输 低密度奇偶检验码 数字成形 数字预失真 |
Research on High-Speed Data Transmission Transmitter based on Digital Modulation |
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| HAN wei,TIAN Rui-fu,LU Wei-qiang.Research on High-Speed Data Transmission Transmitter based on Digital Modulation[J].Communications Technology,2014(5):544-548. |
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| Authors: | HAN wei TIAN Rui-fu LU Wei-qiang |
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| Affiliation: | (Shanghai Aerospace Electronics Technology Institute ,Shanghai 201109, China) |
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| Abstract: | It＇s known that the existing satellite-earth data transmission system has low transmission rate and single modulation mode and cannot be reconfigured in orbit. In order to solve these problems, a high- speed data transmitter scheme based on digital modulation is proposed by using modem digital signal pro- cessing technique and advanced digital components. The system structure, basic principle and core compo- nents are introduced in brief, while channel coding technology with high gain and low complexity, digital shaping technology based on LUT and baseband digital pre-distortion technology are analyzed in detail. Besides, the corresponding technological approaches are given, which lay foundation for the implementa- tion of digital data transmission system in the future. |
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| Keywords: | satellite data transmission LDPC digital shaping digital pre-distortion |
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