Optimized Blind Transition Detection for Pruned Transition-Based DFE in Directly Modulated Optical Transceivers

Blind transition detection methods for pruned transition-based DFE in a <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$53 \text{Gb} / \mathrm{s} \text{PAM}-4$</tex> directly modulated system are evaluated. Hard-decision, gradient-based, and ASSET approaches are evaluated, with ASSET achieving BER <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\sim 10^{-5}$</tex> under 500 m multimode transmission.