Abstract
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 improvement at the bit-error ratio of 10 -6 compared to a corresponding BICM-based scheme.
Original language | English (US) |
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Article number | 5404879 |
Pages (from-to) | 434-436 |
Number of pages | 3 |
Journal | IEEE Photonics Technology Letters |
Volume | 22 |
Issue number | 6 |
DOIs | |
State | Published - Mar 15 2010 |
Keywords
- Forward-error correction
- Low-density paritycheck (ldpc) codes
- Optical communication
- Quasi-cyclic codes
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering