Arabaci Murat, Djordjevic Ivan B, Saunders Ross, Marcoccia Roberto M
Department of Electrical and Computer Engineering, University of Arizona, 1230 E Speedway Blvd., Tucson, AZ 85721, USA.
Opt Express. 2010 Feb 1;18(3):1820-32. doi: 10.1364/OE.18.001820.
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.
为了在光传输网络（OTN）上实现高速传输并最大化其吞吐量，我们建议使用基于分量非二进制准循环（QC）低密度奇偶校验（LDPC）码的速率自适应偏振复用编码多级调制与相干检测。与现有技术的比特交织LDPC编码调制（BI-LDPC-CM）方案相比，所提出的非二进制LDPC编码调制（NB-LDPC-CM）方案不仅由于符号级而非比特级处理而减少了延迟，而且根据星座图大小，要么显著降低计算复杂度，要么显著提高编码增益。如本文所述，与现有技术的二进制对应方案相比，所提出的NB-LDPC-CM方案满足了未来OTN的需求，即在OTN的整个生命周期内更好地实现目标误码率性能并提供最大可能的吞吐量。
