The Graphics Processing Unit (GPU) has become an integral part of astronomical instrumentation, enabling high-performance online data reduction and accelerated online signal processing. In this paper, we describe a wide-band reconfigurable spectrometer built using an off-the-shelf GPU card. This spectrometer, when configured as a polyphase filter bank (PFB), supports a dual-polarization bandwidth of up to 1.1 GHz (or a single-polarization bandwidth of up to 2.2 GHz) on the latest generation of GPUs. On the other hand, when configured as a direct FFT, the spectrometer supports a dual-polarization bandwidth of up to 1.4 GHz (or a single-polarization bandwidth of up to 2.8 GHz).
@article{arxiv.1411.0436,
title = {A GPU-Based Wide-Band Radio Spectrometer},
author = {Jayanth Chennamangalam and Simon Scott and Glenn Jones and Hong Chen and John Ford and Amanda Kepley and D. R. Lorimer and Jun Nie and Richard Prestage and D. Anish Roshi and Mark Wagner and Dan Werthimer},
journal= {arXiv preprint arXiv:1411.0436},
year = {2015}
}
Comments
5 pages, 3 figures, Accepted for publication in PASA