【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。更多还原

【Abstract】 A modified CORDIC algorithm is presented,based on computing the trigonometric function of specific angle,which can be expressed as 2 kπ/ 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.更多还原