2018
DOI: 10.1109/jlt.2018.2791615
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25.4-Tb/s Transmission Over Transpacific Distances Using Truncated Probabilistically Shaped PDM-64QAM

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Cited by 24 publications
(4 citation statements)
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“…where 𝐻 is the signal 4D entropy, R is the code rate or NGMI, M is the constellation size before constellation truncation [44], and 𝑃 is the pilot overhead. The log-likelihood ratios of the demodulated signals were calculated by a bit-metric decoder [45] to carry out decoding or evaluate NGMI.…”
Section: A Experimental Setupmentioning
confidence: 99%
“…where 𝐻 is the signal 4D entropy, R is the code rate or NGMI, M is the constellation size before constellation truncation [44], and 𝑃 is the pilot overhead. The log-likelihood ratios of the demodulated signals were calculated by a bit-metric decoder [45] to carry out decoding or evaluate NGMI.…”
Section: A Experimental Setupmentioning
confidence: 99%
“…The higher shaping depth of the PS signals can bring larger shaping gain, but too large shaping depth will not be able to adapt well to the DSP algorithms at the receiving end. The truncated PS , was utilized to obtain a more suitable shaping depth and reduce the difficulty of some DSP algorithms, such as the constant modulus algorithm (CMA) equalization.…”
Section: Research Progress On Long-distance Transmissionmentioning
confidence: 99%
“…In recent years, probabilistic shaping (PS) has become a hotspot in high data rate transmission [9,10]. By changing the probability of each constellation point to make a Gaussian-like constellation, PS could provide additional shaping gain to eliminate the gap between the Shannon capacity and system source entropy (SE).…”
Section: Introductionmentioning
confidence: 99%