A kind of base-3FFT butterfly unit of small size

Base-3FFT butterfly unit of small size, does not use multiplier but uses limited fixed point adder to substitute, to reduce resource consumption. Base-3 butterfly unit for small size, comprises The module that multiplies each other, this module for realize with The operation of multiplying each other, it comprises that 3 registers, 1 decimal point control module, 6 fixed point adders and 7 shift units can realize. Base-3FFT butterfly unit of small size, contrast prior art, can, keeping, under the precision of single-precision floating point, reducing resource consumption in realization, dwindle cost, and have the effect compared with small size.