Optical interconnect system and method for data center

An optical interconnect system for a data center, comprising:

• a nonlinear differential precoding module, wherein the nonlinear differential precoding module performs nonlinear differential precoding on an inputted original signal, to obtain a precoded signal with an increased quantity of levels;
• a generalized Tomlinson-Harashima precoding (GTHP) module, wherein THP in the GTHP module is a single-tap simplified model, and the GTHP module pre-equalizes the precoded signal with an increased quantity of levels, to obtain a pre-equalized signal with scattered distribution;
• a faster than Nyquist (FTN) module, wherein the FTN module performs high-frequency truncation filtering on the pre-equalized signal with scattered distribution, to obtain a discrete signal;
• a signal transmission module, wherein the signal transmission module transmits the discrete signal from a transmitting end to a receiving end;
• a feed-forward equalizer (FFE), wherein the FFE performs strong equalization on the discrete signal to obtain a level slice signal, and decodes the level slice signal according to a GTHP decoding table, to obtain a decoded signal;
• and
• a simplified 2D constellation distortion (S2DCD) module, wherein the S2DCD module processes the decoded signal to reshape a constellation, and obtains a restored signal according to a time interleaving method, wherein the S2DCD module discards a noise parameter for which calculation requires participation of a feedback decision signal, and reserves an amplitude modulation parameter,
• wherein the nonlinear differential precoding module, the GTHP module, and the FTN module are disposed at the transmitting end, and the FFE and the S2DCD module are disposed at the receiving end.