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改进的CORDIC模块实现的直接数字频率合成器
引用本文:陈立功,宋学瑞,王鑫. 改进的CORDIC模块实现的直接数字频率合成器[J]. 计算机工程与应用, 2010, 46(17): 57-59. DOI: 10.3778/j.issn.1002-8331.2010.17.016
作者姓名:陈立功  宋学瑞  王鑫
作者单位:中南大学 信息科学与工程学院,长沙 410083
摘    要:在传统的定点数流水线型CORDIC算法基础上,就减少迭代次数上提出一种改进算法,实现并行处理时的符号预测。改进算法大大减少了流水线迭代次数,节省了FPGA的Slice Flip Flops数量。最后利用改进算法在Xilinx公司的Virtex-II平台上实现了直接数字频率合成器(DDS)。

关 键 词:坐标旋转数字计算算法(CORDIC)  现场可编程门阵列(FPGA)  符号预测  直接数字频率合成器(DDS)  
收稿时间:2009-04-01
修稿时间:2009-6-8 

Direct digital frequency synthesizer based on improved CORDIC module
CHEN Li-gong,SONG Xue-rui,WANG Xin. Direct digital frequency synthesizer based on improved CORDIC module[J]. Computer Engineering and Applications, 2010, 46(17): 57-59. DOI: 10.3778/j.issn.1002-8331.2010.17.016
Authors:CHEN Li-gong  SONG Xue-rui  WANG Xin
Affiliation:Information Science and Engineering College,Central South University,Changsha 410083,China
Abstract:An improved algorithm based on the traditional fixed-point pipelined CORDIC-based algorithm is proposed to reduce number of iterations and realize the sign prediction in parallel processing.Improved algorithm not only greatly reduces the pipeline iterations but also saves the number of Slice Flip Flops of FPGA.Finally using this algorithm the Direct Digital frequency Synthesize(rDDS) at Xilinx's Virtex-II platform is realized.
Keywords:COordinate Rotation DIgital Compute(rCORDIC)  Field Programmable Gate Array(FPGA)  sign prediction  Direct Digital frequency Synthesize(rDDS)
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