A Design of Polyphase Filter Bank for Radio Astronomy Based on CUDA

A Polyphase filter bank is designed with the GPU and the latest NVIDIA CUDA parallel architecture for radio astronomy and its performance is tested and analyzed. Both GPU's powerful floating-point calculations and high performance parallel execution capabilities are adopted in this design and they accelerate PFB and FFT algorithms, therefore improve the efficiency of the filter bank. Experiment results show that the polyphase filter bank designed in this paper has certain flexibility and extensibility; it can implement high-speed filtering and high-speed channelization and improve computing efficiency and parallel data processing capability for astronomical digital backend algorithms.