| 脉阶调制器数字控制系统 |
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| 引用本文： | 潘明海,赵伟.脉阶调制器数字控制系统[J].无线电工程,2006,36(7):20-22. |
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| 作者姓名： | 潘明海 赵伟 |
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| 作者单位： | 燕山大学信息科学与工程学院,河北,秦皇岛,066004 |
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| 摘 要： | 鉴于目前国内大部分无线电台的短波发射机脉阶调制器控制系统以模拟方式实现的现状。在现有的脉阶调制器技术的基础上对其控制系统进行数字化、智能化改造。基于DSP的短波发射机脉阶调制器数字控制系统采取改进的等效面积法实现PSM＋PWM调制。计算机仿真结果表明，改进的等效面积法可以更好地抑制谐波，使输出波形质量得到改善。
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| 关 键 词： | 短波发射机 脉阶调制 等效面积法 数字信号处理 规则采样 |
| 收稿时间： | 2005-12-10 |
| 修稿时间： | 2005年12月10 |
The Digital Control System of Impulse Ladder Modulator |
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| PAN Ming-hai,ZHAO Wei.The Digital Control System of Impulse Ladder Modulator[J].Radio Engineering of China,2006,36(7):20-22. |
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| Authors: | PAN Ming-hai ZHAO Wei |
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| Affiliation: | College of Information Science and Engineering, Yanshan University, Qinhuangdao Hebei 066004, China |
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| Abstract: | At present, a majority of the control systems of impulse ladder modulator of shortwave transmitter are based on simulation mode in China. In this paper, we perform the digital and intelligent reconstruction for the control system of impulse ladder modulator based on the current impulse ladder modulation technique. The digital control system of impulse ladder modulator based on DSP realizes the modulation of PSM and PWM using the method of improved equivalent area. The computer simulation results indicate that the method can suppress the harmonic better and improve the waveform quality. |
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| Keywords: | shortwave transmitter PSM PWM equivalent area DSP regular sampling |
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