butterfly operation meaning in Chinese

蝶形操作

First , employing ordinary butterfly operations formula in fft , lifting matrixes has been got and fft transform that maps plural integer to plural integer has been achieved
首先，通过fft中的一般蝶形运算公式，构造提升矩阵，实现fft的复整数到复整数的变换。
This algorithm is based on the 16 - fft about square root decomposition , and using the phase revolution unit replaces multiplication , and uses the serial butterfly operation unit . at last , gives the correspond realization measure in fpga
本文根据一种基于平方根分解的16点fft算法，采用相位旋转因子取代乘法器，并利用串行流水蝴蝶运算单元给出了一种新的实现算法，并介绍了其在fpga中相应的实现方法。
Then , according to characteristic of four kinds of butterfly operation in real number signal integer fft transform keeping modulus conjugating with symmetry , different lifting matrixes has been got and real number signal integer fft transform keeping modulus conjugating with symmetry can been achieved
然后，根据实信号保持共轭对称性的fft整数变换中的四类蝶形运算特点分别构造不同的提升矩阵，从而实现实信号保持共轭对称性的fft整数变换。