CFFT是一个数据宽度和点数都可配置的基4 FFT core，由于旋转因子是用CORDIC算法实现的，因此经过FFT后信号的增益和标准的FFT算法不同。但对于OFDM调制、解调等应用并不重要。由于增益是确定的，因此在输出时乘以确定常数即可等价标准的FFT。该FFT core的输入是正序的，输出是按照基4反序的-CFFT is a data width and number can be configured based 4 FFT core, due to the rotation factor is realized with CORDIC algorithm, so after FFT algorithm gain and standard signal after the FFT different. But is not essential for OFDM modulation, demodulation and other applications. The gain is determined, constant can be determined by multiplying the equivalent standard FFT so on output. The FFT core input is positive, the output is in accordance with the base 4 in reverse order