jkania7 / mad-filter-gpu

CUDA based Median Absolute Deviation (MAD) Filter for RFI mitigation

MAD filter GPU : CUDA-based RFI mitigation algorithm using Median Absolute Deviation (MAD).

There are two versions of the code: madfilter_small and madfilter_large

To compile the code use the following command: nvcc -Xptxas="-v" -o madfilter_small madfilter_small.cu -arch=sm_??

Make sure you have help_small.sh in the same directory as the compiled binary to generate a help message

madfilter_small runs a MAD based filter on SIGPROC format filterbank data. Each GPU thread runs a filter on all frequency channels of a single time sample. The output is stored in a binary file with the same base name as the input file and _filtered appended to it. The output file does not have the original SIGPROC header so that needs to be added to the output to make it compatible with standard pulsar processing software. An example of generating a cleaned filterbank file is the following:

./madfilter_small 3000000 672 3 -m 256 find_the_pulse.fil; head -c 256 find_the_pulse.fil > header.txt; cat header.txt find_the_pulse.fil_filtered > find_the_pulse_filtered.fil