Sillekens, E;
Alvarado Segovia, A;
Okonkwo, CM;
Thomsen, BC;
(2016)
An Experimental Comparison of Coded Modulation Strategies for 100 Gbit/s Transceivers.
Journal of Lightwave Technology
, 34
(24)
pp. 5689-5697.
10.1109/JLT.2016.2628101.
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Abstract
Coded modulation is a key technique to increase the spectral efficiency of coherent optical communication systems. Two popular strategies for coded modulation are turbo trellis-coded modulation (TTCM) and bit-interleaved coded modulation (BICM) based on low-density parity-check (LDPC) codes. Although BICM LDPC is suboptimal, its simplicity makes it very popular in practice. In this work, we compare the performance of TTCM and BICM LDPC using information-theoretic measures. Our information-theoretic results show that for the same overhead and modulation format only a very small penalty (less than 0.1 dB) is to be expected when an ideal BICM LDPC scheme is used. However, the results obtained for the coded modulation schemes implemented in this paper show that the TTCM outperforms BICM LDPC by a larger margin. For a 1000 km transmission at 100 Gb/s, the observed gain was 0.4 dB.
| Type: | Article |
|---|---|
| Title: | An Experimental Comparison of Coded Modulation Strategies for 100 Gbit/s Transceivers |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/JLT.2016.2628101 |
| Publisher version: | http://dx.doi.org/10.1109/JLT.2016.2628101 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/ |
| Keywords: | Decoding, Receivers, Forward error correction, Phase shift keying, Iterative decoding, turbo trellis-coded modulation, Achievable information rates, bit-wise receivers, coded modulation, generalized mutual information, information rates, mutual information, trellis-coded modulation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1531184 |
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