基于改进的CORDIC算法的FFT复乘及其FPGA实现

Improved cordic-based FFT plural-multiplication and its FPGA implementation

根据定点FFT中旋转因子所对应的CORDIC旋转方向可预先求解的特点,改进了CORDIC算法中旋转方向的计算方法,在节约乘法器资源的同时兼顾了速度与精度的要求,并基于改进的CORDIC算法,利用FPGA实现了这种FFT复乘模块。仿真结果表明该设计可行,具有一定的实际意义和应用前景。

This paper improved the algorithm of rotate direction in CORDIC according to the characteristic of CORDIC rotation direction of rotation factor can be solved in advance in fixed point FFT, meeting the requirements of high-speed and precision as well as resources-saving. And realized this FFF plural-multiplication module based on improved CORDIC algorithm by using FPGA, and the simulation result shows that it is feasible and has some practical meaning and applied foreground.