Operating Points for Low-Density Parity-Check Codes in On-off Keyed Fiber-Optic Transmission Systems
Benjamin P.C. Smith, Frank R. Kschischang · 2009
We consider the rate/distance tradeoff for LDPC-coded OOK systems under soft-decision iterative decoding. Below 6000 km, EXIT-chart optimized irregular LDPC codes outperform systems that use a nonlinearity-reducing constrained inner code.