基于流水线CORDIC结构的DDS实现  

A Direct Digital Frequency Synthesizer Implementation Based on Pipelined CORDIC Architecture

作　　者：邓芳芳[1] 王厚军[1] 李力[1] 

机构地区：[1]电子科技大学自动化工程学院

出　　处：《可编程控制器与工厂自动化（PLC FA）》2011年第10期99-101,47,共4页Programmable controller & Factory Automation(PLC & FA)

摘　　要：CORDIC(Coordinate Rotation Digital Computer)算法只需要通过迭代简单的移位相加操作来完成包括三角函数、双曲函数、对数函数在内的大量函数的计算,因此被广泛应用于信号和图像处理、通信系统、机器人技术等多种领域。本文在FPGA中实现了一种新型的直接数字频率合成器(Direct Digital Synthesis,DDS),采用流水线结构的MV-CORDIC算法代替了传统DDS中的ROM查找表,用以实现相位到幅度的转换。从仿真结果可知该方法是可行的。最后简单地进行了误差分析。CORDIC（Coordinate Rotation Digital Computer） can perform several computing tasks such as the calculation of trigonometric,hyperbolic and logarithmic functions and many others.As a consequence,CORDIC has been utilized for applications in diverse areas such as signal and image processing,communication systems,robotics,and so on. In this article,we implement a novel Direct Digital Frequency Synthesizer on FPGA, performing functional mapping from phase to sine ampltude by pipelined CORDIC architecture,instead of ROM look-up.The simulation results show that the method is feasibled and advisable.At last,the article analyzes errors briefly.

关 键 词：CORDIC DDS FPGA 直接数字频率合成器 

分 类 号：TN4[电子电信—微电子学与固体电子学]