基于直接数字频率合成技术的数字调制实现 |
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引用本文: | 方二喜,周鸣籁,朱灿焰.基于直接数字频率合成技术的数字调制实现[J].江苏电器,2006(6):7-9. |
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作者姓名: | 方二喜 周鸣籁 朱灿焰 |
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作者单位: | 苏州大学,电子信息学院,江苏,苏州,215021 |
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摘 要: | 通过对直接数字合成技术DDS工作原理的分析,结合具体的DDS芯片AD9850,详细介绍了包括FM,FSK,PSK等多种数字调制方法的实现。结果表明,数字调制具有分辨率高、全数字化可编程、相位噪声低等特点。利用多路选择器连接调制信号和载波信号,可以实现多种调制信号的任意切换。
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关 键 词: | 直接数字合成 AD9850芯片 数字调制 |
文章编号: | 1007-3175-(2006)06-0007-02 |
Realization of Digital Modulation Based on Direct Digital Frequency Synthesis |
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Authors: | FANG Er-xi ZHOU Ming-lai ZHU Can-yan |
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Abstract: | Through analysis on the working principle of direct digital synthesis (DDS) technique,combined with actual DDS chip AD9850,detailed introduction to including FM,FSK,PSK etc multi-digital modulation methods' realization was made.The results show that digital modulation is with high resolution,total digitalization programmable,and low phase noise etc.By using multi-route selector to connect modulation signal and carrier wave signal,random switching of multi-modulation signals can be realized. |
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Keywords: | direct digital synthesis chip AD9850 digital modulation |
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