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2. ��ž�����ѧ ���̱�����ѧԺ,�Ͼ� 210007
Coordinates conversion of software radar based on improved CORDIC algorithm
Xia Dong1, Cha Hao1, Zhou Mo1, Huang Ying2*
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

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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.
Keywords�� software radar   terminal display   coordinates conversion   CORDIC algorithm     
Received 2010-07-14;
About author: �� ��(1983-),��,ɽ��������,��ʿ��,xcdo@163.com.
�Ķ�, ���, ��ĭ, ����.����״���ڸĽ�CORDIC�㷨������任[J]  �������պ����ѧѧ��, 2011,V37(8): 1026-1029
Xia Dong, Cha Hao, Zhou Mo, Huang Ying.Coordinates conversion of software radar based on improved CORDIC algorithm[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(8): 1026-1029
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