基于FPGA的CORDIC算法实现  

Implementation of CORDIC Algorithm Based on FPGA

作　　者：蔡权利 高博[1] 龚敏[1] CAI Quanli;GAO Bo;GONG Ming(Micro-Electronics of College of Physical Science and Technology,Key Laboratory of Micro-Electronics Technology of Sichuan Province,Chengdu 610065,China)

机构地区：[1]四川大学物理科学与技术学院,微电子技术四川省重点实验室,成都610065

出　　处：《电子器件》2018年第5期1242-1246,1256,共6页Chinese Journal of Electron Devices

摘　　要：针对传统CORDIC算法延时大,消耗资源多的缺点,在平行CORDIC算法的基础上提出了一种优化的平行算法。该算法利用二进制转两极算法和微旋转角度编码对低部和高部的旋转方向进行预测,并在高部旋转中利用特定的正反旋转抵消策略来减少旋转次数。采用FPGA对提出的算法进行了硬件设计和验证,结果表明,算法延时,资源消耗和精度较传统算法来说有了明显改善。The delay and resources consumption of traditional cordic algorithm are large.For this reason,an optimized parallel algorithm based on parallel cordic algorithm is proposed,which predicts the rotation directions of the lower part and the high part by using the binary-to-bipolar algorithm and the micro-rotation angle coding,and reduces the rotation times by using positive(negative)rotations to compensate negative(positive)rotations in the high part rotation.The proposed algorithm is designed and validated by FPGA.The results indicate that the delay,the source consumption and the precision are improved obviously compared with traditional algorithms.

关 键 词：现场可编程门阵列 坐标旋转数字计算方法 平行算法 正反旋转抵消 

分 类 号：TN402[电子电信—微电子学与固体电子学]