A polyphase filter for GPUs and multi-core processors

Abstract

Software radio telescopes are a new development in radio astronomy. Rather than using expensive dishes, they form distributed sensor networks of tens of thousands of simple receivers. Signals are processed in software instead of custom-built hardware, taking advantage of the flexibility that software solutions offer. In turn, the data rates are high and the processing requirements challenging. GPUs and multi-core processors are promising devices to provide the required processing power. LOFAR1, the largest radio telescope, is a prime example of a software radio telescope.