Present a improved block floating point algorithm which solves the overflow in long point FFT effectively and improves precision.
采用了一种改进的块浮点算法，有效避免了溢出问题并且提高了精度。
According to different situations the FFT algorithm is applied to. three types of fix-point, floating-point and block-floating-point complex FFT algorithms are presented.
根据不同的应用场合，分别实现了定点、浮点和块浮点三种数据格式的复数FFT算法。
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