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An FPGA based trigger and RFI filter for radio detection of cosmic rays

An FPGA based trigger and RFI filter for radio detection of cosmic rays. Zbigniew Szadkowski 1 , Hartmut Gemmeke 2 , Andreas Haungs 3 , Karl-Heinz Kampert 4 , Christoph Rühle 2 , and Adrian Schmidt 2. Problems:

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An FPGA based trigger and RFI filter for radio detection of cosmic rays

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  1. An FPGA based trigger and RFI filter for radio detection of cosmic rays Zbigniew Szadkowski1, Hartmut Gemmeke2, Andreas Haungs3, Karl-Heinz Kampert4, Christoph Rühle2, and Adrian Schmidt2 • Problems: • Detect radio emission of cosmic raysin the presence of RFI confine to 30 to 80 MHz and  find a trigger suppressing RFI & man made noise • Use only low power, but 4 channels • Reduce noise as far as possible Real Time Conference, Lisbon, 2010

  2. Fig. Block diagram of the embedded electronics Digital solution of our problems? Trigger and convolutions in a FPGA • Resulting problems: • Nyquist  sampling rate >160 MHz • Synchronisation by GPS and beacon (1 ns timing) • Implement FFT and iFFT for each polarization • Avoid leakage by overlapping blocks  still higher frequency 210 MHz necessary • Low power (solar powered system) minimized hardware Real Time Conference, Lisbon, 2010

  3. Come to our poster PDAQ-18 and see how we solved the problems Thanks The necessary hardware really exists Real Time Conference, Lisbon, 2010

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