SETI, the Search for ExtraTerrestrial Intelligence, is the search for radio signals emitted by alien civilizations living in the Galaxy. Narrow-band FFT-based approaches have been preferred in SETI, since their computation time only grows like N∗lnN, where N is the number of time samples. On the contrary, a wide-band approach based on the Kahrunen-Lo'eve Transform (KLT) algorithm would be preferable, but it would scale like N∗N. In this paper, we describe a hardware-software infrastructure based on FPGA boards and GPU-based PCs that circumvents this computation-time problem allowing for a real-time KLT.
A real-time KLT implementation for radio-SETI applications
Melis A.;Possenti A.;Perrodin D.;Trois A.;Barbaro M.;
2016-01-01
Abstract
SETI, the Search for ExtraTerrestrial Intelligence, is the search for radio signals emitted by alien civilizations living in the Galaxy. Narrow-band FFT-based approaches have been preferred in SETI, since their computation time only grows like N∗lnN, where N is the number of time samples. On the contrary, a wide-band approach based on the Kahrunen-Lo'eve Transform (KLT) algorithm would be preferable, but it would scale like N∗N. In this paper, we describe a hardware-software infrastructure based on FPGA boards and GPU-based PCs that circumvents this computation-time problem allowing for a real-time KLT.
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