8 October 2021 Constellation-shaped three-dimension 14QAM mapping scheme based on regular tetrahedron cells
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Abstract

An innovative constellation-shaped three-dimensional 14-quadrature amplitude modulation QAM (3D-14QAM) mapping scheme based on regular tetrahedron is proposed. The non-uniform 14QAM signals are designed by Huffman code and mapped onto the designed 3D constellation based on regular tetrahedron. The simulation demonstration is carried out successfully by VPI software in a 4  ×  100  Gb  /  s wavelength division multiplexing (WDM) polarization division multiplexed coherent optical communication system with a transmission distance of 300 km. For WDM system, the simulation results show that the proposed scheme is capable of achieving about 1.8 dB OSNR gain over the traditional 3D-16QAM scheme at the hard-decision forward error correction (HD-FEC) limit of 3.8  ×  10  −  3. In addition, the proposed 3D-14QAM can obtain 1.1 dB OSNR gain compared with the traditional 3D-16QAM for single-channel scenario at the HD-FEC. The outstanding performance indicates that the proposed scheme can provide a performance improvement for both single carrier system and WDM system. And benefited from the ability of suppress nonlinearity, the proposed scheme can obtain a larger gain in the WDM system than a single carrier system.

© 2021 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2021/$28.00 © 2021 SPIE
Hui Xu, Yongjun Wang, Xishuo Wang, Xinyu Liu, Qi Zhang, and Xiangjun Xin "Constellation-shaped three-dimension 14QAM mapping scheme based on regular tetrahedron cells," Optical Engineering 60(10), 106103 (8 October 2021). https://doi.org/10.1117/1.OE.60.10.106103
Received: 4 July 2021; Accepted: 27 September 2021; Published: 8 October 2021
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KEYWORDS
Wavelength division multiplexing

Picosecond phenomena

Telecommunications

Optical engineering

Polarization

Optical amplifiers

Quadrature amplitude modulation

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