基于FPGA的DDS调频信号发生器设计与实现  

Design and Implementation of DDS Modulation Signal Generator Based on FPGA

作　　者：毛群[1,2] 王仕旭[1] 王建国[2] 

机构地区：[1]阿坝师范高等专科学校应用物理研究所,四川汶川623002 [2]电子科技大学电子工程学院,四川成都610054

出　　处：《西昌学院学报（自然科学版）》2014年第4期57-59,共3页Journal of Xichang University(Natural Science Edition)

基　　金：四川省科技厅科研项目(项目编号:2011JYZ031)

摘　　要：模拟调制系统中,总结起来有两种调频方法,直接调频法可以获得较大频率偏移,但频率稳定低,温漂时漂都比较大,间接调频法频率稳定高,但是电路十分复杂。针对上述传统模拟调频方法的不足,从信号调频基本原理出发进行理论推导,结合DDS技术基本工作原理进行设计,利用FPGA来实现DDS调频信号的产生。并着重介绍了DDS调频原理及电路实现过程,给出了FPGA设计的仿真和示波器测试图,整个电路硬件单元简单,稳定性好,实验结果表明该设计是有效的。In the analog modulation system,there are two kinds of frequency modulation method to sum up.The direct frequency modulation method can obtain large frequency offset,but frequency stability is low,temperature drift and time drift are relatively large;indirect frequency modulation method for frequency stability is high,but the circuit is very complex.Aiming at the lack of traditional analog frequency modulation method,theoretical derivation is made from the basic principle of signal frequency modulation,combinating the basic work principle of DDS technology to design,using FPGA to achieve the generated DDS FM signal.It focuses on the DDS modulation principle and circuit realization process.provides simulation and oscilloscope test chart FPGA designis.The whole hardware circuit unit is simple,the stability is good,the experimental results show that the design is effective.

关 键 词：直接数字频率合成器 调频 现场可编程门阵列 Quartus II 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]