一种改进CORDIC算法的研究与实现  

Research and Realization of One Improved CORDIC Algorithm

作　　者：段素蓉[1] 

机构地区：[1]西南交通大学信息科学与技术学院,四川成都610031

出　　处：《成都大学学报（自然科学版）》2011年第3期242-244,共3页Journal of Chengdu University（Natural Science Edition）

摘　　要：坐标变换在风力发电变流器的控制系统中应用广泛,随着系统对实时性要求不断提高,传统的方法已难以适应.在介绍基本CORDIC算法原理的基础上,提出了一种改进的CORDIC算法,该算法利用三角函数的对称性,分别对输入角度进行预处理,对迭代结果进行后处理,实现了整个周期(-π^+π)的三角函数计算,算法采用18级流水线结构实现,其转换速度快,精度高,占用资源少.整个设计基于Quartus II平台,使用Verilog编程实现,仿真测试验证了设计的正确性和可行性.Coordinate transformation is widely applied in the wind power converter control system.With the increasing demands of real time,traditional methods can not achieve the requirements.Based on introduction to the principle of CORDIC algorithm,an improved CORDIC algorithm was proposed.In light of the symmetry of trigonometric function,this algorithm achieved a full cycle（-π ～＋π） of the trigonometric calculations by pre-processing input angles and post-processing iterated results.It was implemented by 18 pipeline architecture with the characteristic of high translating speed,high precision and fewer logic resources.Based on Quartus II platform,using Verilog Language,the design was realized,which verified the validity and feasibility after synthesized software simulation.

关 键 词：CORDIC 坐标变换 流水线结构 

分 类 号：TN953.4[电子电信—信号与信息处理]