TY - GEN
T1 - Optimal Constellation Shaping in Optical Communication Systems
AU - Qu, Zhen
AU - Djordjevic, Ivan B
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/9/26
Y1 - 2018/9/26
N2 - In optical communications systems, Shannon limit can be closely approached by properly chosen constellation shaping schemes. Both probabilistic shaping (PS) and geometric shaping(GS) can be applied to M-ary quadrature amplitude modulation (QAM) to obtain the shaping gain. In this invited paper, mutual information (MI) is used as a metric to analyze the performances of regular/GS/PS-8/16QAM formats. In a linear amplified spontaneous emission (ASE) noise dominated system, our numerical results show that the MI performances of the GS-8/16QAM are better than that of regular 8/16QAM and PS-8/16QAM. Then we experimentally compare the performances of regular/GS/PS-16QAM formats over a 100km fiber transmission link. Our numerical and experimental results are very useful in selection of the optimal constellation shaping for a given optical communication system.
AB - In optical communications systems, Shannon limit can be closely approached by properly chosen constellation shaping schemes. Both probabilistic shaping (PS) and geometric shaping(GS) can be applied to M-ary quadrature amplitude modulation (QAM) to obtain the shaping gain. In this invited paper, mutual information (MI) is used as a metric to analyze the performances of regular/GS/PS-8/16QAM formats. In a linear amplified spontaneous emission (ASE) noise dominated system, our numerical results show that the MI performances of the GS-8/16QAM are better than that of regular 8/16QAM and PS-8/16QAM. Then we experimentally compare the performances of regular/GS/PS-16QAM formats over a 100km fiber transmission link. Our numerical and experimental results are very useful in selection of the optimal constellation shaping for a given optical communication system.
KW - geometric shaping
KW - mutual information
KW - probabilistic shaping
KW - quadrature amplitude modulation
UR - http://www.scopus.com/inward/record.url?scp=85055500287&partnerID=8YFLogxK
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U2 - 10.1109/ICTON.2018.8473961
DO - 10.1109/ICTON.2018.8473961
M3 - Conference contribution
AN - SCOPUS:85055500287
T3 - International Conference on Transparent Optical Networks
BT - 2018 20th International Conference on Transparent Optical Networks, ICTON 2018
PB - IEEE Computer Society
T2 - 20th International Conference on Transparent Optical Networks, ICTON 2018
Y2 - 1 July 2018 through 5 July 2018
ER -