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

ID 683337
Date 6/11/2024
Document Table of Contents

14.3. 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.