摘要
本文讨论旋转模式下CORDIC算法的符号预测和迭代计算问题,采用并行计算方法来加速CORDIC算法。文中提出分段符号预测和增加校正迭代的符号预测机制,使用分段迭代展开和三输入加法树来完成CORDIC算法的迭代计算,有效地减少了计算的级数和硬件开销,提高了计算性能。最后,在Altera的StratixII芯片上实现了并行CORDIC结构。
This paper discusses the sign prediction and iterative calculation of the CORDIC algorithm in the rotation mode, and uses a parallel computation technique to accelerate it. We propose the sign prediction mechanism of subsection sign prediction and adding the correcting rotation, and use a method of unfolded subsection iteration and a three-in adder tree to perform the iterative calculation of the CORDIC algorithm. These techniques effectively reduce the correcting rotations and the cost of hardware, and enhance the computing performance. Finally the parallel CORDIC architecture is implemented on the FPGA chip of StratixlI from Altera.
出处
《计算机工程与科学》
CSCD
2008年第8期75-78,共4页
Computer Engineering & Science
基金
国家自然科学基金资助项目(60633050)
