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基于System Generator的CORDIC算法的数字下变频实现

发表时间:2017-05-31  浏览量:1470  下载量:283
全部作者: 陈国平,韦登宜,任义
作者单位: 重庆邮电大学光电工程学院;重庆邮电大学通信与信息工程学院
摘 要: 数字下变频(digital down converter,DDC)是近场安检成像系统接收机中不可或缺的模块,坐标旋转数字计算机(coordinated rotation digital computer,CORDIC)算法是实现DDC最重要的方法。采用Xilinx公司提供的System Generator软件,搭建基于CORDIC算法的全流水线DDC模块,与传统数控振荡器(numerically controlled oscillator,NCO)查找表(look-up-table,LUT)式方法相比,该模块不仅节省了大量的存储器资源,同时实现了NCO和混频功能,减小了硬件实现的代价,达到了较高的运算速度,而且采用较新的DSP工具实现了模块的快速设计与验证。
关 键 词: 信号与信息处理;数字下变频;CORDIC算法;System Generator;流水线;FPGA
Title: Implementation of digital down converter based on the CORDIC algorithm with System Generator
Author: CHEN Guoping, WEI Dengyi, REN Yi
Organization: School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications; School of Communication and Information Engineering, Chongqing University of Posts and Telecommunications
Abstract: Digital down converter (DDC) is used in near field security receiver with important sense. The coordinated rotation digital computer (CORDIC) algorithm is the most important way to implement DDC module. This paper builds a full pipeline DDC module on the base of CORDIC algorithm with System Generator of Xilinx company. Comparing with look-up-table (LUT) of the traditional numberically controlled oscillator (NCO) method, this method not only saves more storage resources, but realizes NCO and mixing function, which reduces the cost of hardware implementation and achieves higher computational speed. At the same time, relatively new DSP tools are used which achieve the rapid design and verification of the module.
Key words: signal and information processing; digital down converter; CORDIC algorithm; System Generator; pipeline; FPGA
发表期数: 2017年5月第10期
引用格式: 陈国平,韦登宜,任义. 基于System Generator的CORDIC算法的数字下变频实现[J]. 中国科技论文在线精品论文,2017,10(10):1157-1162.
 
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