流水线双模CORDIC算法的FPGA实现

CORDIC算法将复杂的算术运算转化为简单的加法和移位操作,然后逐次逼近结果.这种方法很好地兼顾了精度、速度和硬件复杂度,它与VLSI技术的结合对DSP算法的硬件实现具有极大的意义,因而在数字信号处理领域得到了广泛应用.本文首先简要介绍了CORDIC算法的原理,然后详细描述了双模CORDIC算法的模式控制和范围扩展,并且基于FPGA实现了流水线双模CORDIC算法,给出了综合结果,最后下载到FPGA开发板中验证通过.这些结果表明,本算法具有良好的性能,并且已经应用到OFDM系统的频率偏移校正中.

Implementation of pipelined dual-mode CORDIC based on FPGA

By converting complex arithmetic into simple operations such as adding and shift then gradually approach the exact result,CORDIC algorithm keeps balance between precision,speed and hardware complexity,and whose combination with VLSI performs a great role in the hardware implementation of DSP algorithm,enhance CORDIC has been widely used in the field of digital signal processing.We studied the principle of CORDIC algorithm,and described the mode control and range extension,then the pipelined dual-mode CORDIC algorithm is implemented based on FPGA,results of synthesis is achieved.Eventually the results are downloaded into FPGA development board,which verify the favourable performance of the algorithm which can be used to the frequency offset correction in OFDM system.