Install libgnuradio-fft3.7.11 by entering the following commands in the terminal:
sudo apt update sudo apt install libgnuradio-fft3.7.11
Description:
gnuradio fast Fourier transform functions
Library for Fourier transform techniques used in gnuradio. Uses single precision FFT from libfftw3-single3. Part of the main gnuradio build.
Homepage: http://gnuradio.org/
Version: 3.7.11-10
Section: universe/libs