基于无伸缩因子CORDIC算法的DDS设计  

Design of DDS with Scale-Free CORDIC Algorithm

作　　者：李陈磊[1] 竺小松[1] 徐壮[1] 

机构地区：[1]解放军电子工程学院,合肥230031

出　　处：《火力与指挥控制》2014年第7期160-163,共4页Fire Control & Command Control

摘　　要：提出一种无伸缩因子的双曲线坐标旋转数字计算(CORDIC)算法,该算法解决了伸缩因子的补偿问题,扩展了传统算法中受限的收敛域。对改进算法进行了误差分析,并通过仿真图直观比较,表明采用的算法精度满足硬件精度要求。提出了一种CORDIC算法的多级流水线结构和一种新的直接数字频率合成器(DDS)设计方法,此方案降低了硬件复杂度,易于实现。In this paper,a scaling-free CORDIC algorithm is proposed tor hyperbolic that the problems of scale factor compensation is eliminated and the limited range of convergence associated with the classical algorithm is extended. The error of the improved algorithm is analyzed and the simulation diagram is compared, which show that the accuracy of the algorithm used by the hardware meet the accuracy. Based on the improved algorithm,a multilevel structure of pipeline CORDIC algorithm and a new DDS is implemented. The scheme is easier to implement and the complexity of hardware is decreased.

关 键 词：DDS 无伸缩因子CORDIC算法 多级流水线结构 

分 类 号：TN92[电子电信—通信与信息系统]