A Gray code mapping scheme for CAP probabilistically shaped 9QAM in an IM/DD system

Kai Lv; Qi Zhang; Xishuo Wang; Qinghua Tian; Feng Tian; Yongjun Wang; Xiangjun Xin; Xiaolong Pan

doi:10.1016/j.optcom.2018.12.042

A Gray code mapping scheme for CAP probabilistically shaped 9QAM in an IM/DD system

Kai Lv, Qi Zhang, Xishuo Wang, Qinghua Tian, Feng Tian, Yongjun Wang, Xiangjun Xin, Xiaolong Pan^*

^*Corresponding author for this work

Beijing University of Posts and Telecommunications

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

A Gray code mapping scheme is proposed to reduce coding penalty for probabilistically shaped 9QAM. The carrierless amplitude and phase modulation (CAP) probabilistically shaped 9QAM with the Gray code mapping scheme is experimentally investigated in a single carrier intensity modulation/direct detection (IM/DD) transmission system. The experiment results show that the proposed 9QAM with Gray coding has a gain of 0.034 bits/symbol and 0.111 bits/symbol over 9QAM without Gray coding and star-8QAM at a received optical power of -5.5 dBm, respectively. All of the three modulation formats have the same spectral efficiency (SE) equal to 3 bits/symbol.

Original language	English
Pages (from-to)	174-177
Number of pages	4
Journal	Optics Communications
Volume	437
DOIs	https://doi.org/10.1016/j.optcom.2018.12.042
Publication status	Published - 15 Apr 2019
Externally published	Yes

Keywords

Carrierless amplitude and phase modulation
Gray code mapping
Intensity modulation/direct detection
Probabilistically shaped 9QAM

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10.1016/j.optcom.2018.12.042

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title = "A Gray code mapping scheme for CAP probabilistically shaped 9QAM in an IM/DD system",

abstract = "A Gray code mapping scheme is proposed to reduce coding penalty for probabilistically shaped 9QAM. The carrierless amplitude and phase modulation (CAP) probabilistically shaped 9QAM with the Gray code mapping scheme is experimentally investigated in a single carrier intensity modulation/direct detection (IM/DD) transmission system. The experiment results show that the proposed 9QAM with Gray coding has a gain of 0.034 bits/symbol and 0.111 bits/symbol over 9QAM without Gray coding and star-8QAM at a received optical power of -5.5 dBm, respectively. All of the three modulation formats have the same spectral efficiency (SE) equal to 3 bits/symbol.",

keywords = "Carrierless amplitude and phase modulation, Gray code mapping, Intensity modulation/direct detection, Probabilistically shaped 9QAM",

author = "Kai Lv and Qi Zhang and Xishuo Wang and Qinghua Tian and Feng Tian and Yongjun Wang and Xiangjun Xin and Xiaolong Pan",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier B.V.",

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doi = "10.1016/j.optcom.2018.12.042",

language = "English",

volume = "437",

pages = "174--177",

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T1 - A Gray code mapping scheme for CAP probabilistically shaped 9QAM in an IM/DD system

AU - Lv, Kai

AU - Zhang, Qi

AU - Wang, Xishuo

AU - Tian, Qinghua

AU - Tian, Feng

AU - Wang, Yongjun

AU - Xin, Xiangjun

AU - Pan, Xiaolong

PY - 2019/4/15

Y1 - 2019/4/15

N2 - A Gray code mapping scheme is proposed to reduce coding penalty for probabilistically shaped 9QAM. The carrierless amplitude and phase modulation (CAP) probabilistically shaped 9QAM with the Gray code mapping scheme is experimentally investigated in a single carrier intensity modulation/direct detection (IM/DD) transmission system. The experiment results show that the proposed 9QAM with Gray coding has a gain of 0.034 bits/symbol and 0.111 bits/symbol over 9QAM without Gray coding and star-8QAM at a received optical power of -5.5 dBm, respectively. All of the three modulation formats have the same spectral efficiency (SE) equal to 3 bits/symbol.

AB - A Gray code mapping scheme is proposed to reduce coding penalty for probabilistically shaped 9QAM. The carrierless amplitude and phase modulation (CAP) probabilistically shaped 9QAM with the Gray code mapping scheme is experimentally investigated in a single carrier intensity modulation/direct detection (IM/DD) transmission system. The experiment results show that the proposed 9QAM with Gray coding has a gain of 0.034 bits/symbol and 0.111 bits/symbol over 9QAM without Gray coding and star-8QAM at a received optical power of -5.5 dBm, respectively. All of the three modulation formats have the same spectral efficiency (SE) equal to 3 bits/symbol.

KW - Carrierless amplitude and phase modulation

KW - Gray code mapping

KW - Intensity modulation/direct detection

KW - Probabilistically shaped 9QAM

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DO - 10.1016/j.optcom.2018.12.042

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SP - 174

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JO - Optics Communications

JF - Optics Communications

ER -

A Gray code mapping scheme for CAP probabilistically shaped 9QAM in an IM/DD system

Abstract

Keywords

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