Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System
This paper proposes and demonstrates a 31.25 Gbps two-dimensional eight level pulse amplitude modulation with trellis coded modulation (2D-PAM8-TCM) transmission in intensity modulation and direct detection based short reach system. In this system, the commercial directly modulated laser...
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| Format: | Article |
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IEEE
2017-01-01
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| Series: | IEEE Photonics Journal |
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| Online Access: | https://ieeexplore.ieee.org/document/7967656/ |
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| author | Yan Fu Meihua Bi Da Feng Xin Miao Hao He Weisheng Hu |
| author_facet | Yan Fu Meihua Bi Da Feng Xin Miao Hao He Weisheng Hu |
| author_sort | Yan Fu |
| collection | DOAJ |
| description | This paper proposes and demonstrates a 31.25 Gbps two-dimensional eight level pulse amplitude modulation with trellis coded modulation (2D-PAM8-TCM) transmission in intensity modulation and direct detection based short reach system. In this system, the commercial directly modulated laser and photodiode with trans-impedance amplifier (PIN-TIA) with a combined modulation bandwidth of ∼16 GHz are used as transmitter and receiver, respectively. For 2D-PAM8-TCM signals, except for regular 8-state convolutional encoder, both 16-state and 32-state encoders are provided. Considering the coding gain and the complexity of convolutional encoder, the 16-state one is recommended. Moreover, instead of Viterbi decoder, the M-algorithm is utilized at the receiver side to reduce decoder complexity. It is experimentally demonstrated that 2D-PAM8-TCM scheme can achieve 2.5 b per symbol and ∼0.5 dB sensitivity improvement (bit error rate @<inline-formula><tex-math notation="LaTeX">$3.8 \times {10^{ - 3}}$</tex-math> </inline-formula>) over a 20 km standard single mode fiber in comparison with conventional PAM4. Thanks to no additional digital signal processing in receiver side except M-algorithm, this scheme is simple and effective, which can be considered as an attractive technique for future short reach system. |
| format | Article |
| id | doaj-art-c840d24a6c4d423c811bc97d2ac6c955 |
| institution | Kabale University |
| issn | 1943-0655 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Photonics Journal |
| spelling | doaj-art-c840d24a6c4d423c811bc97d2ac6c9552025-08-20T03:31:21ZengIEEEIEEE Photonics Journal1943-06552017-01-01941810.1109/JPHOT.2017.27225407967656Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical SystemYan Fu0Meihua Bi1Da Feng2Xin Miao3Hao He4Weisheng Hu5State Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaState Key Laboratory of Advanced Optical Communication Systems and Networks, Shanghai Jiao Tong University, Shanghai, ChinaThis paper proposes and demonstrates a 31.25 Gbps two-dimensional eight level pulse amplitude modulation with trellis coded modulation (2D-PAM8-TCM) transmission in intensity modulation and direct detection based short reach system. In this system, the commercial directly modulated laser and photodiode with trans-impedance amplifier (PIN-TIA) with a combined modulation bandwidth of ∼16 GHz are used as transmitter and receiver, respectively. For 2D-PAM8-TCM signals, except for regular 8-state convolutional encoder, both 16-state and 32-state encoders are provided. Considering the coding gain and the complexity of convolutional encoder, the 16-state one is recommended. Moreover, instead of Viterbi decoder, the M-algorithm is utilized at the receiver side to reduce decoder complexity. It is experimentally demonstrated that 2D-PAM8-TCM scheme can achieve 2.5 b per symbol and ∼0.5 dB sensitivity improvement (bit error rate @<inline-formula><tex-math notation="LaTeX">$3.8 \times {10^{ - 3}}$</tex-math> </inline-formula>) over a 20 km standard single mode fiber in comparison with conventional PAM4. Thanks to no additional digital signal processing in receiver side except M-algorithm, this scheme is simple and effective, which can be considered as an attractive technique for future short reach system.https://ieeexplore.ieee.org/document/7967656/Trellis coded modulation (TCM)pulse amplitude modulation (PAM)M-algorithm. |
| spellingShingle | Yan Fu Meihua Bi Da Feng Xin Miao Hao He Weisheng Hu Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System IEEE Photonics Journal Trellis coded modulation (TCM) pulse amplitude modulation (PAM) M-algorithm. |
| title | Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System |
| title_full | Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System |
| title_fullStr | Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System |
| title_full_unstemmed | Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System |
| title_short | Spectral Efficiency Improved 2D-PAM8 Trellis Coded Modulation for Short Reach Optical System |
| title_sort | spectral efficiency improved 2d pam8 trellis coded modulation for short reach optical system |
| topic | Trellis coded modulation (TCM) pulse amplitude modulation (PAM) M-algorithm. |
| url | https://ieeexplore.ieee.org/document/7967656/ |
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