Fast fourier transform apparatus

摘要

A fast fourier transform apparatus is disclosed having a simple processing structure and improved processing speed. The fast fourier transform apparatus includes a memory and an operation processing portion that classifies to-be-processed data stored in the memory into data processing groups, according to a priority value given to the plurality of radix operators based on the amount of bit processing per unit. The memory is controlled so that the to-be-processed data is processed by the radix-operators in accordance with the order of the classified data processing. An order of the classified data processing groups processed by the radix operators is recovered by re-arranging the data processing groups according to a reversing method which corresponds to the operation processing order. The radix operations and data recovery is performed by reversing the digits just one time, thereby simplifying the procedure of the operation.