A GPU-Based Wide-Band Radio Spectrometer
Jayanth Chennamangalam, Simon Scott, Glenn Jones, Hong Chen, John, Ford, Amanda Kepley, D. R. Lorimer, Jun Nie, Richard Prestage, D. Anish, Roshi, Mark Wagner, and Dan Werthimer
TL;DR
This paper presents a flexible, high-bandwidth radio spectrometer built on off-the-shelf GPUs, capable of reconfiguration for different signal processing modes and bandwidths, enhancing real-time astronomical data analysis.
Contribution
The paper introduces a reconfigurable wide-band spectrometer using consumer-grade GPUs, supporting multiple configurations and significantly increasing bandwidth capabilities for astronomical observations.
Findings
Supports up to 1.1 GHz dual-polarization bandwidth as PFB
Supports up to 2.2 GHz single-polarization bandwidth as PFB
Supports up to 1.4 GHz dual-polarization bandwidth as FFT
Abstract
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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