CORDIC算法研究与实现

Research and Implementation of the CORDIC Algorithm

提出一种基于CORDIC算法的数字鉴相方法。首先介绍CORDIC算法的基本鉴相原理,然后讨论算法的抗噪和抗正交两路失衡性能,对算法精度进行分析,最后给出算法在FPGA中的工程实现,仅使用移位和加法即可完成。为满足实时性要求,采用流水线结构。实验结果表明,相比于传统的查表方法,CORDIC算法实现了计算精度、运算速度和硬件资源利用等方面性能的兼顾。

This paper puts forward a digital phase discrimination technique based on the CORDIC algorithm on the basis of engineering.Firstly,the basic phase discrimination principle is presented.Then the anti-noise and anti-I Q imbalance capabilities are discussed,and the precision is analyzed.At last the FPGA engineering implementation is given only with shifters,adders and pipeline structure.The experiment results show that compared with the traditional LUT,the CORDIC algorithm can meet the requirements of the calculation precision,clock and usage of resources.