一种基于DDS的信号源的设计与实现  

Design and implementation of a signal generator based on DDS

作　　者：顾赵宇[1] 王平[2] 傅其详 

机构地区：[1]国防科学技术大学电子信息系统复杂电磁环境效应国家重点实验室,湖南长沙410073 [2]国防科学技术大学科研部学术成果处,湖南长沙410073

出　　处：《现代电子技术》2015年第5期51-53,57,共4页Modern Electronics Technique

摘　　要：设计并实现了一种基于直接数字合成技术的信号源。因利用高性能FPGA芯片和板上大规模存储阵列,使该信号源可以按照直接数字频率合成(DDFS)和直接数字波形合成(DDWS)两种工作模式产生信号。首先阐述整个信号源的硬件基本结构,然后论述各个关键模块的具体设计,最后通过测试表明该信号源不仅可以产生线性调频、相位编码等各种常规信号,还可以产生各种自定义的复杂波形信号,且各项性能指标均达到设计要求。A radar/jamming signal generator based on direct digital synthesis （DDS） technology was designed and implemented. The signal generator based on advanced FPGA chip and large-scale memory array can work in two modes： DDFS and DDWS. The framework of the signal generator is elaborated in this paper. The design of each important module is revealed. The tested results verify that the generator can produce conventional signals such as linear-frequency-modulated signal and phase-coded signal, as well as complex user-defined radar signal. All the performance indexes of the signal generator can meet the design requirements.

关 键 词：信号源 FPGA DDS 模块设计 

分 类 号：TN955-34[电子电信—信号与信息处理]