基于近似计算的精度动态可调FFT处理器

马丽萍, 张骁煜, 白雨鑫, 陈鑫, 张颖

An Accuracy Dynamically Configurable FFT Processor Based on Approximate Computing

MA Liping, ZHANG Xiaoyu, BAI Yuxin, CHEN Xin, ZHANG Ying

表1 512点FFT近似蝶形配置

Tab.1 Approximate butterfly configuration of 512 FFT

蝶形节点9的j值 各蝶形节点j值的选取 (蝶形节点1~9排列) 0 (4, 3, 3, 3, 2, 2, 1, 1, 0) 1 (4, 3, 3, 3, 2, 2, 1, 1, 1) 2 (4, 3, 3, 3, 2, 2, 2, 2, 2) 3 (4, 3, 3, 3, 3, 3, 3, 3, 3) 4 (4, 4, 4, 4, 4, 4, 4, 4, 4) 5 (5, 5, 5, 5, 5, 5, 5, 5, 5) 6 (6, 6, 6, 6, 6, 6, 6, 6, 6) 7 (7, 7, 7, 7, 7, 7, 7, 7, 7)