| 数字下变频器的原理与实现方法 |
| |
| 引用本文： | 吴芝路,贾长辉,任广辉.数字下变频器的原理与实现方法[J].哈尔滨商业大学学报(自然科学版),2007,23(3):343-345. |
| |
| 作者姓名： | 吴芝路 贾长辉 任广辉 |
| |
| 作者单位： | 哈尔滨工业大学,电子与信息技术研究院,哈尔滨,150001 |
| |
| 摘 要： | 阐述了数字下变频器(Digital Down Conversion,DDC)的原理.DDC主要由数字控制振荡器、混频器、低通滤波器等部分组成,DDC是将中频信号与数字控制振荡器产生的载波信号进行混频,再经过低通滤波器得到基带信号,实现了下变频功能.分别介绍了用查表法、坐标旋转数值计算机算法和MVR CORDIC)算法3种方法实现DDC的过程.基于这3种方法设计的DDC应用广泛,同时也适合用于FPGA器件实现.
|
| 关 键 词： | 数字下变频 DDC 查表法 CORDIC MVR CORDIC |
| 文章编号： | 1672-0946（2007）03-0343-03 |
| 收稿时间： | 2006-07-11 |
| 修稿时间： | 2006-07-11 |
Principle and implementing of DDC |
| |
| WU Zhi-lu,JIA Chang-hui,REN Guang-hui.Principle and implementing of DDC[J].Journal of Harbin University of Commerce :Natural Sciences Edition,2007,23(3):343-345. |
| |
| Authors: | WU Zhi-lu JIA Chang-hui REN Guang-hui |
| |
| Institution: | School of Electronics and Information Technology, Harbin Institute of Technology, Harbin 150001 China |
| |
| Abstract: | The principle of DDC(Digital Down Conversion) is clarified in this paper.DDC is made up of NCO(Numeral control oscillation),mixer and lowpass filter.The singal of intermediate frequency and the singal of carrier wave are mixed up in the DDC,then the singal passes through lowpass filter,the function of down conversion is implemented.The implementing of DDC based on looking up table,CORDIC algorithmic and MVR CORDIC algorithmic are introduced in this paper.DDC based on these means are used diffusely,and are implemented compatibly using in FPGA. |
| |
| Keywords: | digital down conversion DDC looking up table CORDIC MVR CORDIC |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
