Four-Dimensional Trellis Coded Modulation for Flexible Optical Communications

被引:10
作者
Alreesh, Saleem [1 ,2 ]
Schmidt-Langhorst, Carsten [2 ]
Emmerich, Robert [2 ]
Berenguer, Pablo Wilke [2 ]
Schubert, Colja [2 ]
Fischer, Johannes Karl [2 ]
机构
[1] Tech Univ Berlin, Fachgebiet Nachrichtentech, D-10623 Berlin, Germany
[2] Heinrich Hertz Inst Nachrichtentech Berlin GmbH, Fraunhofer Inst Telecommun, Dept Photon Networks & Syst, D-10587 Berlin, Germany
关键词
Digital signal processing; forward error correction; optical fiber communication; partitioning algorithms; quadrature amplitude modulation; turbo codes;
D O I
10.1109/JLT.2016.2632305
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We experimentally investigate four-dimensional (4-D) Trellis coded modulation (TCM) based on polarization-division multiplexed (PDM) 16-ary quadrature amplitude modulation (QAM), PDM-32QAM, and PDM-64QAM formats. A multirate optical transponder is enabled by only a single-encoder/decoder structure. The scheme is resilient to cycle-slip events due to its 90 degrees phase rotation invariant property. In addition, the performance of 4-D turboTCM(TTCM) is investigated. The superior performance of TTCM over TCMis experimentally validated. Furthermore, the performance of 4-DTCM/TTCMis comparedwith standard PDM-mQAM formats combined with the soft-decision (SD) forward error correction (FEC) codes. It is shown that 4-DTCM-concatenated with a low-complexity hard-decision FEC could be an interesting candidate for complexity-performance tradeoff with SD-FEC.
引用
收藏
页码:152 / 158
页数:7
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