摘要
快速傅立叶变换、兼容GPS/Galileo系统接收机中上下变频以及DDS中都需要变换因子,这些变换因子要求计算2 kπ/2 N形式角度的三角函数值,提出了一种调整的CORDIC算法,通过仿真该算法在计算这些特殊角度的三角函数值时,不仅节省系统存储空间资源,而且计算效率可以提高50%,是一种行之有效的方法。
A modified CORDIC algorithm is presented, based on computing the trigonometric function of specific angle, which can be expressed as 2kπ/2^N and used in FFT, upconvert/downconvert and DDS. Simulation results show that the storage unit can be saved and computation efficiency can be increased by about 50% compared with the traditional CORDIC algorithm. Therefore the algorithm is feasible and available.
出处
《计算机工程》
CAS
CSCD
北大核心
2007年第3期271-272,共2页
Computer Engineering
基金
中欧伽利略计划基金资助项目(CGTR)
