10 August 2019 Carrier-less amplitude-phase geometric probabilistic hybrid shaping 16QAM scheme applied to data center networks
Xia Sheng, Qi Zhang, Xiangjun Xin, Xishuo Wang, Qinghua Tian, Lijia Zhang, Ying Tao, Naijin Liu, Feng Tian, Xiaolong Pan, Bo Zhang
Author Affiliations +
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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KEYWORDS
Data centers

Modulation

Optical filters

Electronic filtering

Picosecond phenomena

Binary data

Digital signal processing

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