基于CORDIC算法的改进NCO实现技术及其性能分析  

Impromved NCO realization technology based on CORDIC arithmetic and performance analysis

作　　者：陈万培[1] 黄鹦[1] 邵宁[1] 汪琼[1] 

机构地区：[1]扬州大学信息工程学院,江苏扬州225009

出　　处：《扬州大学学报（自然科学版）》2010年第2期52-56,共5页Journal of Yangzhou University：Natural Science Edition

基　　金：扬州大学校级重点学科建设项目(扬大研[2007]5号)

摘　　要：介绍一种基于协调旋转数字计算机(coordinate rotation digital computer,CORDIC)算法的改进数字控制振荡器(numerical controlled oscillator,NCO)的实现方法.应用CORDIC算法替代传统正弦函数ROM查找表,可以显著减少存储量,有效提高资源利用率.分析了改进NCO方法的具体设计参数对误差性能的影响,并进行MATLAB仿真、现场可编程门阵列(field programmable gate array,FPGA)实现,得到综合后的仿真波形,结果产生高精度的输出信号,达到预定的设计要求.This paper introduces an improved numerical controlled oscillator（NCO） based on CORDIC algorithm,which applies CORDIC arithmetic instead of traditional SIN ROM lookup table.With this method,data storage can be greatly reduced and the utility factor of resources can be efficiently improved.According to the corresponding literature,a detailed error performance analysis is given.MATLAB emulator results and the realization on FPGA along with the output signal emulator wave after synthesis are brought forth.Therefore,high precision output signal can be produced and the design purpose can be attained.

关 键 词：协调旋转数字计算机算法 数字控制振荡器 MATLAB仿真 现场可编程门阵列 

分 类 号：TN929.5[电子电信—通信与信息系统]