Complex sentence: SSB (single side band) tends to be used in applications where long range communication is needed, here the non-linear device is mixng frequencies but because the carrier has been supprressed it is not possible to restore the original audio with such a simple demodulator.
Split into simpler sentences: SSB (single-sideband) tends to be used in applications where long range communication is needed. Here, the non-linear device is mixing frequencies, but because the carrier has been suppressed, it is not possible to restore the original audio with such a simple demodulator.