Adaptive IIR-notch filter for RFI suppression in a radio detection of cosmic rays

0550983 - FZÚ 2022 RIV US eng J - Journal Article
Szadkowski, Z.
Adaptive IIR-notch filter for RFI suppression in a radio detection of cosmic rays.
IEEE Transactions on Nuclear Science. Roč. 64, č. 6 (2017), s. 1292-1303. ISSN 0018-9499. E-ISSN 1558-1578
Research Infrastructure: AUGER-CZ - 90038
Keywords : Auger Radio Engineering Array * field-programmable gate array (FPGA) * Cyclone V
OECD category: Particles and field physics
Impact factor: 1.440, year: 2017
Method of publishing: Limited access
https://doi.org/10.1109/TNS.2017.2705640

Radio stations can observe radio signals caused by coherent emissions due to geomagnetic radiation and charge excess processes mainly in the frequency band from 30 to 80 MHz. This range is highly contaminated by human-made radio frequency interference (RFI). In order to improve the signal-to-noise ratio, RFI filters are used to suppress this contamination. Infinite impulse response (IIR)-notch filters operate with fixed parameters and suppress several narrow bands. IIR filters are generally potentially unstable due to feedbacks, however, they are much shorter and more power efficient than finite impulse response filters. We implemented an NIOS virtual processor calculating new set of IIR filter coefficients, which are reloaded dynamically on-the-fly.

Permanent Link: http://hdl.handle.net/11104/0326260