title: Polarization-multiplexed rate-adaptive non-binary-quasi-cyclic-LDPC-coded multilevel modulation with coherent detection for optical transport networks.
abstract: In order to achieve high-speed transmission over optical transport networks (OTNs) and maximize its throughput, we propose using a rate-adaptive polarization-multiplexed coded multilevel modulation with coherent detection based on component non-binary quasi-cyclic (QC) LDPC codes. Compared to prior-art bit-interleaved LDPC-coded modulation (BI-LDPC-CM) scheme, the proposed non-binary LDPC-coded modulation (NB-LDPC-CM) scheme not only reduces latency due to symbol- instead of bit-level processing but also provides either impressive reduction in computational complexity or striking improvements in coding gain depending on the constellation size. As the paper presents, compared to its prior-art binary counterpart, the proposed NB-LDPC-CM scheme addresses the needs of future OTNs, which are achieving the target BER performance and providing maximum possible throughput both over the entire lifetime of the OTN, better.
authors.affiliation: Department of Electrical and Computer Engineering, University of Arizona, 1230 E Speedway Blvd., Tucson, AZ 85721, USA. arabaci@email.arizona.edu
authors.forename: Murat
authors.initials: M
authors.lastname: Arabaci
authors.forename: Ivan B
authors.initials: IB
authors.lastname: Djordjevic
authors.forename: Ross
authors.initials: R
authors.lastname: Saunders
authors.forename: Roberto M
authors.initials: RM
authors.lastname: Marcoccia