Nonbinary Quasi-Cyclic LDPC-Based Coded Modulation for Beyond 100-Gb/s Transmission

Murat Arabaci, Ivan B. Djordjevic, Ross Saunders, Roberto M. Marcoccia
2010 IEEE Photonics Technology Letters  
We propose using coded modulation based on nonbinary quasi-cyclic low-density parity-check (LDPC) codes for beyond 100-Gb/s optical transmission. The proposed scheme not only lowers the latency in the system but also offers much higher coding gains than its binary counterpart based on bit-interleaved coded modulation (BICM). We show that using component LDPC codes over high order finite fields and matching bandwidth-efficient modulations, our scheme can provide around 1-dB coding gain
more » ... t at the bit-error ratio of 10 6 compared to a corresponding BICM-based scheme.
doi:10.1109/lpt.2010.2040981 fatcat:ad5lmsam3bfcfgvta7s5tuxph4