Low-Complexity 4D×D MIMO Equalizer Enabling 2.6-Tb/s/λ SDM Signal Reception over Dynamic Four-Coupled-Core Cabled Transmission Line

We propose a transceiver-impairment-tolerant 4D×D multiple-input/multiple-output equalizer with significantly reduced computational overhead and improved tracking performance for spatial-division-multiplexed receivers and demonstrated it in a 100-Gbaud transmission over a cabled four-coupled-core transmission line with MHz-class fluctuation.