• 论文 •

软件雷达基于改进CORDIC算法的坐标变换

1. 1. 海军工程大学 海洋电磁环境研究所,武汉 430033;
2. 解放军理工大学 工程兵工程学院,南京 210007
• 收稿日期:2010-07-14 出版日期:2011-08-30 发布日期:2011-09-03
• 作者简介:夏 栋(1983-),男,山东临朐人,博士生,xcdo@163.com.

Coordinates conversion of software radar based on improved CORDIC algorithm

Xia Dong1, Cha Hao1, Zhou Mo1, Huang Ying2

1. 1. Institute of Ocean Electromagnetic Environment, Naval University of Engineering, Wuhan 430033, China;
2. Engineering Institute of Engineer Corps, PLA University of Science and Technology, Nanjing 210007, China
• Received:2010-07-14 Online:2011-08-30 Published:2011-09-03

Abstract: Radar data processing and terminal display realized by software on general-purpose computer becomes a trend now. And fast conversion from polar coordinates to orthogonal coordinates is required in real-time radar-s display. The value of azimuth angle increases evenly in radar display processing, and the next azimuth angle value can be got by the same tiny increment added to the current value. An appropriate increment was selected to satisfy the coordinate rotation digital computer(CORDIC) algorithm-s demand as well as meet the need of radar display. And based on above, the CORDIC algorithm was improved. The improved CORDIC algorithm can calculate the trigonometric function only by one rotation, which accelerates the speed of conversion from polar coordinates to orthogonal coordinates. Though analysis, the improved algorithm is 15 times faster than the original algorithm.