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A GPU-Based Wide-Band Radio Spectrometer

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arxiv 1411.0436 v1 pith:NUX2A5QU submitted 2014-11-03 astro-ph.IM

A GPU-Based Wide-Band Radio Spectrometer

Jayanth Chennamangalam , Simon Scott , Glenn Jones , Hong Chen , John Ford , Amanda Kepley , D. R. Lorimer , Jun Nie
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Richard Prestage D. Anish Roshi Mark Wagner Dan Werthimer
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keywords bandwidthspectrometerconfigureddual-polarizationonlineprocessingsingle-polarizationsupports
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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).

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