Discrete multi-tone transmission with optimized QAM constellations for Short-reach optical communications

Authors: Amiralizadeh, SiamakYekani, AminRusch, Leslie
Abstract: We investigate performance of optimized M-ary quadrature amplitude modulation (M-QAM) constellations in short-reach single-polarization (SP) and dual-polarization (DP) discrete multitone (DMT) with direct detection. The constellations are obtained by using an iterative gradient-search algorithm. For the nonsquare constellations, we find bit-to-symbol mappings with a blind search method. Our experiments show that the data rate can be improved in both SP and DP DMT systems by using optimized constellations instead of square M-QAM. Net data transmission rates of 165 and 152 Gb/s are respectively achieved for back-to-back and 2.2 km in a direct-detection DP DMT system assuming forward error correction threshold of 3.8×10-3.
Document Type: Article de recherche
Issue Date: 30 May 2016
Open Access Date: 23 September 2016
Document version: AM
Permalink: http://hdl.handle.net/20.500.11794/10248
This document was published in: Journal of Lightwave Technology, Vol. 34 (15), 3515–3522 (2016)
https://doi.org/10.1109/JLT.2016.2574598
Institute of Electrical and Electronics Engineers
Alternative version: 10.1109/JLT.2016.2574598
Collection:Articles publiés dans des revues avec comité de lecture

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