| 直接耦合GMSK调制器低频性能的改进 |
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| 引用本文： | 李峻.直接耦合GMSK调制器低频性能的改进[J].大连铁道学院学报,2004,25(4):46-50. |
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| 作者姓名： | 李峻 |
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| 作者单位： | 大连交通大学电气信息学院 辽宁 大连 116028 |
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| 摘 要： | 使用调制技术的数据通信系统需要良好的低频响应，是对基于PLL频率合成器的数据通信系统的重要要求，如GMSK和四电平FSK调制方式都要求调制响应延伸到直流，这种特性许多调制器都不容易满足，重点论述了设计与PLL频率合成器的特性有关的GMSK调制器时遇到的问题，也举例说明了要解决这些问题为什么可以使用两点调制．
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| 关 键 词： | 调制器 GMSK 低频性能 直接耦合 频率合成器 PLL 调制响应 制方 问题 要求 |
Improvement of Low Frequency Performance of DC-coupled GMSK Modulators |
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| LI Jun.Improvement of Low Frequency Performance of DC-coupled GMSK Modulators[J].Journal of Dalian Railway Institute,2004,25(4):46-50. |
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| Authors: | LI Jun |
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| Abstract: | Data communication systems that employ modulation techniques requiring good low-frequency response place unique demands on PLL-based frequency synthesizers.For example,GMSK and four-level FSK modulation schemes require modulation response extened to DC, which is not easily accommodated by many modulators.This paper discusses the ploplems encountered when desingning GMSK modulaters with respect to the characteristics of PLL frequency synthesizers and illustrates two-point modulation used to solve the problems. |
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| Keywords: | data communication frequency synthesizers modulators two-point modulation |
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