Optimally Partitioned Precoding Assisted Hybrid Constellation Entropy Loading for SSB-DMT Systems

Chen, Xi; Chen, Yizhao; Tang, Ming; Cui, Jingxian; Fu, Songnian; Xia, Li; Liu, Deming

doi:10.1364/ofc.2019.m1h.4

Cited by 3 publications

(2 citation statements)

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“…Comparing to long-haul transmission systems where coherent technologies play important roles, data center interconnects require a massive number of transceivers to link diverse areas. Therefore, direct detection (DD) technologies based on pulse amplitude modulation (PAM) [1]- [4], discrete multi-tone (DMT) [5], [6] and Kramers-Kronig receiver (KK) [7]- [10] are attracting much interests due to their advantages on system cost and complexity. Stokes vector direct detection (SV-DD) is another novel DD scheme [11].…”

Section: Introductionmentioning

confidence: 99%

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Jin

et al. 2020

IEEE Photonics J.

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Polarization de-multiplexing becomes challenging in Stokes vector-direct detection (SV-DD) systems, especially when the rotation of state of polarization (RSOP) and fiber chromatic dispersion (CD) are induced. To address this issue, an adaptive blind RSOP equalizer based on Stokes space is proposed. After theoretical analysis, it is found that the distribution of transmitted signals in Stokes space keeps a paraboloid. Based on this analysis, an adaptive scheme is proposed to track the symmetry axis of paraboloid for the first time. It is worth noticing that not only CD but also high-order modulation formats could not change the paraboloid distribution. Therefore, our algorithm has strong robustness to CD and good suitability for SV-DD systems with different modulation formats. In our simulation, the conventional Stokes space-based method and the training sequences (TS) method are both evaluated for comparison. The results show that our scheme can track RSOP of 20 Mrad/s and 8 Mrad/s at hard-decision forward error correction threshold in 28 Gbaud 4-level quadrature amplitude modulation (4-QAM) and 16-QAM SV-DD systems after 100 km fiber transmission, respectively. No additional computational complexity is required compared to the conventional Stokes space-based method. Moreover, compared to the TS-based method, there is no need to know the actual channel information, contributing to good flexibility.

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Section: Introductionmentioning

confidence: 99%

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Jin

et al. 2020

IEEE Photonics J.

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“…Recently, a significant effort with advanced modulation formats in optical transmission system has been made to enhance the spectral efficiency, such as filter bank multi carrier (FBMC) modulation [9,10], discrete multi-tone (DMT) [11][12][13] [14], and carrier-less amplitude phase (CAP) [15]. Usually, these advanced modulation formats require high-resolution DAC and ADC, as well as complex digital signal processing (DSP).…”

Section: Introductionmentioning

confidence: 99%

224-Gbps single-photodiode PAM-4 transmission with extended transmitter bandwidth based on optical time-and-polarization interleaving

Fu¹,

Kong²,

Li³

et al. 2020

Opt. Express

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Intelligent 2-Dimensional Soft Decision Enabled by K-Means Clustering for VCSEL-Based 112-Gbps PAM-4 and PAM-8 Optical Interconnection

Sun

Liu

et al. 2019

J. Lightwave Technol.

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Optimally Partitioned Precoding Assisted Hybrid Constellation Entropy Loading for SSB-DMT Systems

Cited by 3 publications

References 0 publications

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

Adaptive Blind Stokes-Space Based Equalizer for RSOP in SV-DD Systems With High Chromatic Dispersion Tolerance

224-Gbps single-photodiode PAM-4 transmission with extended transmitter bandwidth based on optical time-and-polarization interleaving

Intelligent 2-Dimensional Soft Decision Enabled by K-Means Clustering for VCSEL-Based 112-Gbps PAM-4 and PAM-8 Optical Interconnection

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