| 摘要: |
| 设计了一种以Nios II为控制核心的波特率和载频均可变的2FSK调制器IP核，给出了
软硬件设计方案。 利用直接数字频率合成器（DDS）来合成调制器的调制频率，通过修改DD
S的频率控制字，控制调制频率变化；通过修改可编程分频器的分频因子，控制波特率的变
化。利用嵌入式逻辑分析仪验证结果表明，本系统工作稳定，波特率和调制频率均可通过软
件进行精确设置。 |
| 关键词: 跳频通信 二进制移频键控 数字调制器 可变波特率 载频 现场可编程门阵列 |
| DOI： |
|
| 基金项目:广西壮族自治区教育厅科研项目（200911LX474） |
|
| FPGA based Implementation of a 2FSK Digital Modulator with Variable Baud Rate and Carrier Frequency |
| YANG Xiu-zeng |
| (Department of Physics and Information Techology, Guangxi Normal University
for Nationalities, Chongzuo 532200,China) |
| Abstract: |
| The IP core of a 2FSK digital modulator with variable baud rate and carrier fr
equency is designed with Nios II as control core,and the h
ardward and softward realization are provided. Direct Digital Frequency Synth
esizer（DDS） is
used to synthesize the carrier frequence,and the carrier frequence is adjuste
d by modifying frequency control word of DDS.The baud rate of digital modulator
is also adjusted by modifying divider factor of programmable divider.Test with
SigalTap
II Logic Analyzer shows that the modulator runs stably and both the baud rate
and carrier frequency can be set accurately by program. |
| Key words: FH communication 2FSK digital modulator variable baud rate carrier frequency FP
GA |
《电讯技术》编辑部 