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10 August 2019 Carrier-less amplitude-phase geometric probabilistic hybrid shaping 16QAM scheme applied to data center networks
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Abstract

A hybrid shaping scheme, carrier-less amplitude and phase modulation geometric-probabilistic hybrid shaping 16QAM (CAP-GPS-16QAM), is proposed for data center networks. The probabilistic shaping is achieved by applying the proposed probabilistic subset shaping to the constellation after geometric shaping (GS). An intensity modulation/direct detection experimental system of 5 GBaud is built to verify the proposal. The results show that the gains of the proposed scheme are 2.4, 2.6, and 3 dB compared with CAP-GS-16QAM, CAP-PAS-16QAM, and CAP-square-16QAM, respectively, at BER  =  10  −  3. Meanwhile, in terms of generalized mutual information, the proposal improves the performance by 0.078, 0.125, and 0.153 bits/symbol compared with CAP-GS-16QAM, CAP-PAS-16QAM, and CAP-square-16QAM, respectively.

© 2019 Society of Photo-Optical Instrumentation Engineers (SPIE) 0091-3286/2019/$28.00 © 2019 SPIE
Xia Sheng, Qi Zhang, Xiangjun Xin, Xishuo Wang, Qinghua Tian, Lijia Zhang, Ying Tao, Naijin Liu, Feng Tian, Xiaolong Pan, and Bo Zhang "Carrier-less amplitude-phase geometric probabilistic hybrid shaping 16QAM scheme applied to data center networks," Optical Engineering 58(8), 086105 (10 August 2019). https://doi.org/10.1117/1.OE.58.8.086105
Received: 15 April 2019; Accepted: 12 July 2019; Published: 10 August 2019
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