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UID:pretalx-eu-summit-2026-FWGCHN@cfp.riscv-europe.org
DTSTART;TZID=CET:20260611T110000
DTEND;TZID=CET:20260611T111000
DESCRIPTION:The Fast Fourier Transform (FFT) is a fundamental algorithm in 
 embedded and edge signal processing applications\, including audio and spe
 ech processing\, radar systems\, and biomedical sensing\, where real-time 
 performance must be achieved under strict area and power constraints. Conv
 entional approaches typically rely on dedicated standalone accelerators\, 
 but these often impose significant area and power overheads that are impra
 ctical for resource-constrained embedded and edge platforms. To address th
 is\, tightly-coupled acceleration within the CPU pipeline offers a more ef
 ficient alternative by delivering substantial performance gains without re
 quiring an independent hardware block. This paper presents APEX\, a tightl
 y-coupled coprocessor integrated with the CV32A6 32-bit RISC-V processor\,
  designed to provide high-performance FFT acceleration for embedded RISC-V
  systems. For a fixed-point FFT of size N=512\, APEX achieves an 83.5% red
 uction in execution cycles and an 87.9% reduction in instruction count com
 pared to the software FFT implementation on the baseline CV32A6\, while pr
 eserving the baseline operating frequency and full RV32IM_Zicsr software c
 ompatibility with only minimal area overhead. These results demonstrate th
 at APEX is an efficient and practical solution for accelerating FFT-intens
 ive workloads in embedded and edge deployments built on open RISC-V archit
 ectures.
DTSTAMP:20260522T162404Z
LOCATION:Poster Island A
SUMMARY:APEX: Accelerating FFT on CVA6 with a Tightly Coupled CV-X-IF Co-pr
 ocessor - Abdul Wadood
URL:https://cfp.riscv-europe.org/eu-summit-2026/talk/FWGCHN/
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