TWO EFFICIENT, NEW TECHNIQUES FOR DETECTING DISPERSED RADIO PULSES WITH INTERFEROMETERS: THE CHIRPOLATOR AND THE CHIMAGEATOR
- Sydney Institute for Astronomy (SIfA), School of Physics A28, University of Sydney, Sydney NSW 2006 (Australia)
Searching for dispersed radio pulses in interferometric data is of great scientific interest, but poses a formidable computational burden. Here, we present two efficient, new antenna-coherent solutions: The Chirpolator and The Chimageator. We describe the equations governing both techniques and propose a number of novel optimizations. We compare the implementation costs of our techniques with classical methods using three criteria: the operation rates (1) before and (2) after the integrate-and-dump stage, and (3) the data rate directly after the integrate-and-dump stage. When compared with classical methods, our techniques excel in the regime of sparse arrays, where they both require substantially lower data rates, and The Chirpolator requires a much lower post-integrator operation rate. In general, our techniques require more pre-integrator operations than the classical ones. We argue that the data and operation rates required by our techniques are better matched to future supercomputer architectures, where the arithmetic capability is outstripping the bandwidth capability. Our techniques are, therefore, viable candidates for deploying on future interferometers such as the Square Kilometer Array.
- OSTI ID:
- 21560327
- Journal Information:
- Astrophysical Journal, Supplement Series, Vol. 196, Issue 2; Other Information: DOI: 10.1088/0067-0049/196/2/16; ISSN 0067-0049
- Country of Publication:
- United States
- Language:
- English
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