一种基于DDS的改进信号合成电路设计  

Improved Design of Digital Mixer with DDS

作　　者：李琨[1] 张汉富[1] 张树丹 于宗光 

机构地区：[1]江南大学信息工程学院,江苏无锡214036 [2]中电科集团五十八所,江苏无锡214035

出　　处：《半导体技术》2007年第1期52-54,共3页Semiconductor Technology

基　　金：国防科技重点实验室基金赞助项目(51433020105DZ6801)

摘　　要：传统的信号合成电路利用DDS产生载波信号,再将原信号利用乘法器和加法器来进行合成。基于ROM查找表法和CORDIC算法,本设计提出了一种改进结构。仿真与分析结果表明,与原有电路结构相比,改进后的数字信号合成电路精度高、硬件开销小。The general architecture used in the digital mixer was composed of DDS by which carrier wave was created, the signal was synthesized by multiplier and adder. A new method based on the CORDIC algorithm was introduced. Results from simulation and analysis indicate that the implementation has the advantages of higher precision and simpler structure compared with the former circuit.

关 键 词：直接数字合成 坐标旋转数字计算 信号合成 

分 类 号：TN402[电子电信—微电子学与固体电子学]