Vivek V Menon

Accelerating Real-Time Processing of the ATST Adaptive Optics System Using Coarse-Grained Parallel Hardware Architectures

TitleAccelerating Real-Time Processing of the ATST Adaptive Optics System Using Coarse-Grained Parallel Hardware Architectures
Publication TypeConference Paper
Year of Publication2011
AuthorsV. Venugopalan, K. Richards, S. Barden, T. Rimmele, S. Gregory, and L. Johnson
Conference NameInternational Conference on Engineering of Reconfigurable Systems and Algorithms (ERSA)
Date PublishedJuly
Abstract

The real-time processing of the four meter Advanced Technology Solar Telescope (ATST) adaptive optics (AO) system with approximately 1750 sub-apertures and 1900 actuators requires massive parallel processing to complete the task. The parallel processing is harnessed with the addition of hardware accelerators such as Field Programmable Gate Array (FPGA) and Graphics Processing Unit (GPU). We investigate the hybrid data processing architecture of the Shack-Hartmann correlation and wavefront reconstruction using FPGAs and GPUs. The ATST AO algorithm is implemented, benchmarked on the FPGA-GPU system and compared with the existing legacy Digital Signal Processing (DSP) based hardware system. The cost-effective FPGA platform provides better throughput for the AO processing as compared to the GPU architecture.

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