Figure 1: Simplified flowchart of the tranceiver scheme.
From: Capacity estimates for optical transmission based on the nonlinear Fourier transform

Shown are: the NFT-based synthesis operation at the transmitter and NFT-based demodulation at the receiver (both transmitter and receiver can also include an FT operation depending on the explicit processing algorithm). For a more detailed block-diagram and a thorough description of the NIS-based optical communication system, see (refs 22, 23).