In benchmark_ofdm_tx.py, I heard that the middle number of subcarriers
the occupied_tones is alloacted to carry actual data, and the frequency
of each subcarrier depends on the interpolation rate.
does it mean that if I change the occupied tones, I can control the
of subcarriers that carry actual data while having same the total number
and if that’s true, how can I distinguish and analyze the subcarriers
carry data and which doesn’t carry data?