免缩放因子双步旋转 CORDIC 算法

摘要

CORDIC (Coordinate Rotation Digital Computer) can be an efficient vector rotation algorithm in the design of in-tegrated circuit .Many researches focus on the reduction of iteration times ,and to expand the scope of the convergence and reduce the cost of scaling factor compensation .This paper presents a double-step scaling-free CORDIC algorithm which uses two-step rota-tion strategies .The algorithm reduces the iteration times ,and extends the convergence range to the entire circumference .The experi-ments show that the algorithm has excellent performance in terms of calculation accuracy ,iteration times ,and the area consumption .%集成电路设计中经常使用 CORDIC 算法实现高效的向量旋转操作。当前对该算法的研究热点集中在减少该算法的迭代次数、扩展其收敛范围以及降低缩放因子补偿操作的代价等问题上。本文提出免缩放因子的双步旋转CORDIC 算法使用双步旋转策略，减少了免缩放因子 CORDIC 算法的迭代次数，将收敛区间扩展到了整个圆周区间。实验结果表明，该算法保持高计算精度的同时减少了迭代次数和面积消耗。