Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping
The promising solution for short-reach optical communication, discrete multitone (DMT) system suffer from high peak-to-average power ratio (PAPR). It is easy for the DMT signal to enter the nonlinear region of the components in the systems, which distorts the signal and limits the modulation efficie...
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| Format: | Article |
| Language: | English |
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IEEE
2021-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/9319260/ |
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| author | Tianhao Tong Xi Chen Yizhao Chen Qizhen Sun Zexin Chen Deming Liu Ming Tang |
| author_facet | Tianhao Tong Xi Chen Yizhao Chen Qizhen Sun Zexin Chen Deming Liu Ming Tang |
| author_sort | Tianhao Tong |
| collection | DOAJ |
| description | The promising solution for short-reach optical communication, discrete multitone (DMT) system suffer from high peak-to-average power ratio (PAPR). It is easy for the DMT signal to enter the nonlinear region of the components in the systems, which distorts the signal and limits the modulation efficiency. It is well-known that the precoding technique can suppress the PAPR of DMT without loss of spectral efficiency. We found that, in the I/Q plane, the nonlinear distortion clusters in the constellation points with higher power due to the joint precoding and inverse fast Fourier transform. The principle of this phenomenon has been studied. To cope with the specially distributed nonlinear distortions induced by precoding, we adopted the probabilistic constellation shaping (PCS) technique to reduce the probability of constellation points with high power, resulting in the overall performance improvement. Joint precoding and PCS significantly improve the resistance to nonlinear distortions for DMT systems. Simulations and experiments of 16-QAM and 64-QAM DMT transmission systems were conducted to evaluate the performance. The experimental results show that at the NGMI threshold of 0.92, up to 4 dB enhancement of the receiver sensitivity has been achieved by the proposed scheme when 4-GBd 64-QAM signals are transmitted. |
| format | Article |
| id | doaj-art-25ce5f7eb75842e29889cfa96f49a720 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-25ce5f7eb75842e29889cfa96f49a7202025-08-20T03:32:46ZengIEEEIEEE Photonics Journal1943-06552021-01-0113111210.1109/JPHOT.2021.30506269319260Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation ShapingTianhao Tong0https://orcid.org/0000-0003-0172-4396Xi Chen1https://orcid.org/0000-0003-4758-2864Yizhao Chen2Qizhen Sun3https://orcid.org/0000-0002-2410-6470Zexin Chen4Deming Liu5https://orcid.org/0000-0001-5591-2929Ming Tang6https://orcid.org/0000-0001-8669-4186Wuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaWuhan National Lab for Optoelectronics (WNLO) & National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, ChinaThe promising solution for short-reach optical communication, discrete multitone (DMT) system suffer from high peak-to-average power ratio (PAPR). It is easy for the DMT signal to enter the nonlinear region of the components in the systems, which distorts the signal and limits the modulation efficiency. It is well-known that the precoding technique can suppress the PAPR of DMT without loss of spectral efficiency. We found that, in the I/Q plane, the nonlinear distortion clusters in the constellation points with higher power due to the joint precoding and inverse fast Fourier transform. The principle of this phenomenon has been studied. To cope with the specially distributed nonlinear distortions induced by precoding, we adopted the probabilistic constellation shaping (PCS) technique to reduce the probability of constellation points with high power, resulting in the overall performance improvement. Joint precoding and PCS significantly improve the resistance to nonlinear distortions for DMT systems. Simulations and experiments of 16-QAM and 64-QAM DMT transmission systems were conducted to evaluate the performance. The experimental results show that at the NGMI threshold of 0.92, up to 4 dB enhancement of the receiver sensitivity has been achieved by the proposed scheme when 4-GBd 64-QAM signals are transmitted.https://ieeexplore.ieee.org/document/9319260/DMTprecodingprobabilistic constellation shaping |
| spellingShingle | Tianhao Tong Xi Chen Yizhao Chen Qizhen Sun Zexin Chen Deming Liu Ming Tang Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping IEEE Photonics Journal DMT precoding probabilistic constellation shaping |
| title | Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping |
| title_full | Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping |
| title_fullStr | Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping |
| title_full_unstemmed | Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping |
| title_short | Performance-Enhanced DMT System With Joint Precoding and Probabilistic Constellation Shaping |
| title_sort | performance enhanced dmt system with joint precoding and probabilistic constellation shaping |
| topic | DMT precoding probabilistic constellation shaping |
| url | https://ieeexplore.ieee.org/document/9319260/ |
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