现代电子技术2016，Vol.39Issue(7)：57-59,3.DOI:10.16652/j.issn.1004-373x.2016.07.014
基于CORDIC算法的正交信号源实现
Implementation of quadrature signal source based on CORDIC algorithm
景标 1邢维巍 1张燕琴1
作者信息
- 1. 北京航空航天大学 仪器科学与光电工程学院，北京 100191
- 折叠
摘要
Abstract
The quadrature signal reference source has the significant impact on the performance of the quadrature digital lock⁃in amplifier. According to CORDIC algorithm,the digital quadrature signal source was designed on FPGA. The phase/ampli⁃tude transformation module in DDS technology was realized,which can output the high precision quadrature reference signal, and solve the problems of large hardware cost and limited processing speed when ROM is used to realize phase/amplitude trans⁃formation. The DSS working principle is introduced. The phase/amplitude transformation method based on CORDIC algorithm is described in detail,in which the CORDIC algorithm is used to calculate the sine and cosine values. The simulation and experi⁃mental test for the entire module are conducted,it can output the quadrature signal with adjustable center frequency. The high precision quadrature signal source is realized.关键词
正交信号/FPGA/CORDIC/DDSKey words
quadrature signal/FPGA/CORDIC/DDS分类
信息技术与安全科学引用本文复制引用
景标,邢维巍,张燕琴..基于CORDIC算法的正交信号源实现[J].现代电子技术,2016,39(7):57-59,3.
