DSP Builder for Intel® FPGAs (Advanced Blockset): Handbook

ID 683337
Date 12/12/2022

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15.3. FFT Design Elements Library

Use the DSP Builder advanced blockset FFT Design Elements library blocks to support FFT designs. The library also includes several blocks that support for a radix-22 algorithm.

The radix-22 architecture is a serial version of the radix-4 architecture. It computes a radix-4 butterfly over four (not necessarily consecutive) inputs and produces four (not necessarily consecutive) outputs.

For more information about the radix-22 algorithm, refer to A New Approach to Pipeline FFT Processor – Shousheng He & Mats Torkleson, Department of Applied Electronics, Lund University, Sweden.